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The Fairchild 91 (a.k.a. A-942) was a single-engine eight-passenger flying boat airliner developed in the United States in the mid-1930s. Fairchild designed the aircraft in response to a Pan American Airways request for a small flying boat to operate on their river routes along the Amazon and Yangtze. The result was a conventional high-wing cantilever monoplane with its radial engine mounted above the wing in a streamlined nacelle. Before construction of the prototype was complete, however, Pan American no longer required the aircraft to operate in China, and Fairchild optimised the design for the Brazilian tropics. After the first two aircraft were delivered, Pan American cancelled the remaining four aircraft of its order, as they no longer needed any for China, and the two aircraft were capable of handling the Amazon River. The sole A-942-B was specially built for the American Museum of Natural History and was used by naturalist Richard Archbold on his second expedition to Papua New Guinea in 1936–1937. The prototype was sold to the Spanish Republican Air Force, but the ship carrying it was captured by the Spanish Nationalists and was used by them until 1941. The A-942 bought by industrialist Garfield Wood was sold to the British American Ambulance Corps before being transferred to the RAF, who operated it in Egypt for air-sea rescue. One example was sold to the Imperial Japanese Naval Air Service for evaluation, but it was wrecked shortly after delivery, so a second example was purchased to replace it. Variants Fairchild 91 Baby Clipper Initial version built to Pan Am specifications for use on rivers, powered by a 750 hp (560 kW) Pratt & Whitney S2EG Hornet. Six built. Fairchild A-942-A Alternative designation for the Fairchild 91 Fairchild 91B Jungle Clipper Specially equipped for NYC Museum of Natural History, powered by a 760 hp (570 kW) Wright SGR-1820F-52 Cyclone. One built, NR777. Fairchild A-942-B Alternative designation for the Fairchild 91B. Fairchild XSOK-1 Proposed U.S. Navy scout; none built.[3] Fairchild LXF Two A-942Bs supplied to the Imperial Japanese Navy Air Service for evaluation.

The Australian Lightwing SP-2000 Speed is an Australian light-sport aircraft, designed and produced by Australian Lightwing of Ballina, New South Wales. The aircraft is supplied as a kit for amateur construction or as a complete ready-to-fly-aircraft. The aircraft features a cantilever low-wing, a two-seats-in-side-by-side configuration enclosed cockpit, fixed tricycle landing gear or conventional landing gear and a single engine in tractor configuration. The aircraft fuselage is made from welded steel tubing covered in non-structural fibreglass. Its 8.7 m (28.5 ft) span wing is built from 6061-T6 aluminum covered in doped aircraft fabric and fibreglass. Standard engines available are the 100 hp (75 kW) Rotax 912ULS or the 120 hp (89 kW) Jabiru 3300 four-stroke powerplants. Cockpit access is via gull-winged doors on both sides. Wheel pants are usually fitted. The SP-2000 has been accepted by the US Federal Aviation Administration as a light-sport aircraft as the Outback 2. SP-2000 TD (Tail dragger variant)

The Gyroflug SC 01 Speed Canard is an unconventional sports plane produced in Germany in the 1980s and 1990s. Inspired by the Rutan VariEze, the Speed Canard was an all-new design created without input from Rutan. Like the VariEze, the Speed Canard is a canard-configured mid-wing monoplane with wingtip fins that incorporate rudders. The two-seat tandem cockpit and canopy design were derived from Grob Twin Astir sailplane, and the nosewheel of the tricycle undercarriage is retractable. Construction throughout is of composite materials, and when the design attained German certification in 1983, it became the first composite canard design to achieve certification anywhere in the world. An interesting feature of the control system is that the twin rudders operate independently, allowing both rudders to be deflected outwards simultaneously, cancelling each other's yaw, but acting as airbrakes. In 1987, the development of a four-seat version was announced as the E 401, but was abandoned soon thereafter. In late 1988 Gyroflug partnered with Litton Industries using Gyroflug Speed Canard as for Litton's Advanced Tactical Surveillance System.

The Tachikawa Ki-9 (九五式一型練習機, Kyūgo-shiki ichigata renshuki) was an intermediate training aircraft of the Imperial Japanese Army Air Force built by Tachikawa Aircraft Company Ltd in the 1930s. It was known to the Allies under the nickname of "Spruce" during World War II. This aircraft was mistakenly identified as a Tatchikawa by the British. The Ki-9 was a two-seat, unequal wingspan biplane design. Tachikawa originally planned to use the same basic airframe for both basic training and intermediate training, differentiating the two models by the use of different engines. The prototype Ki-9 flew on 7 January 1935, powered by a 261 kW (350 hp) nine-cylinder Hitachi Ha-13a radial engine. The second prototype was identical, and the third prototype was powered by a 112 hp (80 kW) Nakajima NZ seven-cylinder radial engine. The third prototype exhibited stability problems due to a center of gravity issue, and, as a result, the primary trainer model was abandoned and the Ki-9 was developed only for the intermediate trainer. Tachikawa subsequently developed the Ki-17 for the primary trainer role. The first production aircraft were delivered in 1935. The Ki-9 was introduced to service as the Army Type 95-1 Medium Grade Trainer Model A under the former aircraft naming nomenclature system. The first version had a complex, split-axle landing gear with fairings over the top of the wheels. In 1939, this was modified and simplified, the fuselage slightly shortened, and the total weight reduced. The resulting Army Type 95-1 Model B or Ki-9-kai had improved maneuverability and flight characteristics. This version was quickly superseded by the Army Type 95-1 Model C, or Ki-9-otsu, in full production. Both versions were used widely for blind-flying training with a folding hood over the rear cockpit, and several were modified with a glazed canopy over the rear cockpit for use as a staff officer transport plane. Some were pressed into service for use as "special attack" (kamikaze in American terminology) aircraft in the closing days of the war, fitted with either a 100 kg anti-ship bomb, an oil drum filled with explosives, or fuel in the rear cockpit. Production by Tachikawa totaled 2,395 aircraft, ending in 1942. At least another 220 Ki-9s were constructed by Tokyo Gasu Denki (also known as Gasuden) from 1943 to 1945. The Ki-9 was also flown in wartime by Japanese satellite countries and postwar by the fledgling government of Indonesia and captured units by the Republic of China. Variants Ki-9 (Army Type 95-1 Medium Grade Trainer Model A): Initial version two-seat intermediate trainer aircraft. Ki-9-ko (Army Type 95-1 Medium Grade Trainer Model B): Improved version. Ki-9-otsu (Army Type 95-1 Medium Grade Trainer Model C): Standard production version.

The Pilatus PC-8D Twin Porter was a Swiss ten-seat light transport built by Pilatus Aircraft. The type did not go into production and only one was built. Work on the Twin Porter started in 1966, it was a modified Pilatus PC-6 high-wing monoplane with the nose-mounted engine removed and two 290 hp Lycoming IO-540-GIB engines mounted on the wing leading edges.The prototype first flew on 28 November 1967. Only one aircraft was built as flight testing was halted in 1969.

The Lasco Lascondor (also frequently known by the misspelling "Lasconder") was a 1930s Australian 8-seat passenger and mail carrier aircraft built by the Larkin Aircraft Supply Company (Lasco) at Coode Island, Victoria. It is claimed to be the first multi-engined aircraft designed and built in the Southern Hemisphere. Development of the Lascondor began in June 1928, concurrently with the company's Lascoter; the two aircraft had 90% commonality of structural parts. Like the Lascoter the Lascondor was a high-wing monoplane with a tubular steel structure, featuring a tailwheel undercarriage and a fully enclosed cabin for the passengers and the pilot. A major change was the Lascondor's three Armstrong Siddeley Mongoose engines instead of the Lascoter's single more powerful Siddeley Puma engine. The Lascondor also had greater fuel capacity and a slightly longer fuselage with a redesigned cabin to accommodate an extra row of seats. In addition, while the Lascoter had two sets of flying controls in the cockpit the Lascondor had only one to allow for another passenger seat, giving an overall capacity of seven passengers and one pilot. The only available photo of the Lascondor.

The Mitsubishi Ki-46 was a twin-engine reconnaissance aircraft that was used by the Imperial Japanese Army in World War II. Its Army Shiki designation was Type 100 Command Reconnaissance Aircraft (一〇〇式司令部偵察機); the Allied brevity code name was "Dinah". On 12 December 1937, the Imperial Japanese Army Air Force issued a specification to Mitsubishi for a long-range strategic reconnaissance aircraft to replace the Mitsubishi Ki-15. The specification demanded an endurance of six hours and sufficient speed to evade interception by any fighter in existence or development, but otherwise did not constrain the design by a team led by Tomio Kubo and Jojo Hattori. The resulting design was a twin-engined, low-winged monoplane with a retractable tailwheel undercarriage. It had a small diameter oval fuselage which accommodated a crew of two, with the pilot and observer situated in individual cockpits separated by a large fuel tank. Further fuel tanks were situated in the thin wings both inboard and outboard of the engines, giving a total fuel capacity of 1,490 L (328 imperial gallons). The engines, two Mitsubishi Ha-26s, were housed in close fitting cowlings developed by the Aeronautical Research Institute of the Tokyo Imperial University to reduce drag and improve pilot view. The first prototype aircraft, with the designation Ki-46, flew in November 1939 from the Mitsubishi factory at Kakamigahara, Gifu, north of Nagoya.[3] Tests showed that the Ki-46 was underpowered, and slower than required, only reaching 540 km/h (336 mph) rather than the specified 600 km/h (373 mph). Otherwise, the aircraft tests were successful. As the type was still faster than the Army's latest fighter, the Nakajima Ki-43, as well as the Navy's new A6M2, an initial production batch was ordered as the Army Type 100 Command Reconnaissance Plane Model 1 (Ki-41-I). To solve the performance problems, Mitsubishi fitted Ha-102 engines, which were Ha-26s fitted with a two-speed supercharger, while increasing fuel capacity and reducing empty weight. This version, designated Ki-46-II, first flew in March 1941. It met the speed requirements of the original specification, and was ordered into full-scale production, with deliveries starting in July. Although at first the Ki-46 proved almost immune from interception, the Imperial Japanese Army Air Force realised that improved Allied fighters such as the Supermarine Spitfire and P-38 Lightning could challenge this superiority, and in July 1942, it instructed Mitsubishi to produce a further improved version, the Ki-46-III. This had more powerful, fuel-injected Mitsubishi Ha-112 engines, and a redesigned nose, with a fuel tank ahead of the pilot and a new canopy, smoothly faired from the extreme nose of the aircraft, eliminating the "step" of the earlier versions. The single defensive machine gun of the earlier aircraft was omitted not long into the production run. The new version first flew in December 1942, demonstrating significantly higher speed 630 km/h (391 mph) at 6,000 m (19,700 ft). The performance of the Ki-46-III even proved superior to that of the aircraft intended to replace it (the Tachikawa Ki-70), which as a result did not enter production.[8] During operational testing in March 1944, it was discovered that replacing the engines' single exhaust collector ring with individual pipes provided extra thrust and an increase in top speed to 642 km/h (399 mph). In an attempt to yet further improve the altitude performance of the Ki-46, two prototypes were fitted with exhaust driven turbosupercharged Ha-112-II-Ru engines. This version first flew in February 1944, but only two prototypes were built. Mitsubishi factories made a total of 1,742 examples of all versions (34 x Ki-46-I, 1093 x Ki-46-II, 613 x Ki-46-III, 4 x Ki-46-IV) from 1941 to 1944. For details of operational history and 18 variants, click here.

Powered by four turboprop engines each driving a pair of contra-rotating propellers, the design was the first wide-body transport aircraft and remains the world's largest turboprop-powered aircraft to date. The An-22 first appeared publicly outside the Soviet Union at the 1965 Paris Air Show. Thereafter, the model saw extensive use in major military and humanitarian airlifts for the Soviet Union, and is still in service with the Russian Air Force. In the late 1950s, the Soviet Union required a large military transport aircraft to supplement the Antonov An-8 and An-12s then entering service. Originally known as the An-20, the model is a conventional multi-engined high-wing design. In the early 1960s, the Antonov bureau produced a wooden mock up at its Kyiv, Ukraine, workshops of what was designated the Model 100. The prototype, now designated the An-22, was rolled out on 18 August 1964 and first flew on 27 February 1965. The prototype was given the name Antaeus (sometimes misspelled Antheus) and, after four-months of test flying, was displayed at the 1965 Paris Air Show. All aircraft were built at the Tashkent State Aircraft Factory and the first military delivery was made to the Air Transport Wing at Ivanovo Airbase in 1969. The aircraft was designed as a strategic airlifter, designed specifically to expand the Soviet Airborne Troops' capability to land with their then-new BMD-1 armoured vehicles. The An-22 cargo hold can accommodate four BMD-1s compared to only one in the An-12. It has the capability to takeoff from austere, unpaved, and short airstrips, allowing airborne troops to perform air-landing operations. This is achieved by four pairs of contra-rotating propellers, similar to those on the Tupolev Tu-114. The propellers and exhaust from the engines produce a slipstream over the wings and large double-slotted flaps. The landing gear is ruggedized for rough airstrips. In early versions tire pressures could be adjusted in flight for optimum landing performance. That feature was removed in later models. A total of 69 units were built. For more information on the development, operational history and variants, click here.

The Boeing 720 is a retired American narrow-body airliner produced by Boeing Commercial Airplanes. Announced in July 1957 as a 707 derivative for shorter flights from shorter runways, the 720 first flew on November 23, 1959. Its type certificate was issued on June 30, 1960, and it entered service with United Airlines on July 5, 1960. A total of 154 Boeing 720s and 720Bs were built; production ended in 1967. As a derivative, the 720 had low development costs, allowing profitability despite relatively few sales. Compared to the 707-120, it has a length reduced by 8.33 feet (2.54 m), a modified wing and a lightened airframe for a lower maximum takeoff weight. Originally designed to be powered by four Pratt & Whitney JT3C turbojets, the initial 720 could cover a 2,800-nautical-mile [nmi] (5,200 km; 3,200 mi) range with 131 passengers in two classes. The reconfigured 720B, powered by JT3D turbofans, first flew on October 6, 1960, and entered service in March 1961. It could seat 156 passengers in one class over a 3,200-nautical-mile [nmi] (5,900 km; 3,700 mi) range. Some 720s were later converted to the 720B specification. It was succeeded by the Boeing 727 trijet. Shorter range 707 Boeing announced its plans to develop a new version of the 707 in July 1957. It was developed from the 707-120 to provide for short- to medium-range flights from shorter runways. The model was originally designated 707-020 before being changed to 720 at the input of United Airlines. Compared to the 707-120, it has four fewer frames in front of the wing and one fewer aft: a total length reduction of 8 feet 4 inches (2.54 m). The new model was designed to a lower maximum takeoff weight with a modified wing and a lightened airframe. The wing modifications included Krueger flaps outboard of the outboard engines, lowering take-off and landing speeds—thus shortening runway length requirements—and a thickened inboard leading edge section, with a slightly greater sweep. This modification increased the top speed over the 707-120. It had four Pratt & Whitney JT3C-7 turbojet engines producing 12,500 lbf (55.6 kN) each. At one point in the development phase, it was known as the 707-020, then 717-020, although this was the Boeing model designation of the KC-135 and remained unused for a commercial airliner until it was applied to the MD-95, following Boeing's merger with McDonnell Douglas in 1997. Because the aircraft systems were similar to the Boeing 707, no prototype Boeing 720 was built; any different systems were tested on the Boeing 367-80. The first 720 took its maiden flight on November 23, 1959. The type certificate for the 720 was issued on June 30, 1960. It first entered service with United Airlines on July 5, 1960; 65 of the original version were built. The 720B version of the 720 had JT3D turbofan engines, producing 17,000 lbf (75.6 kN) each. The JT3D engines had lower fuel consumption and higher thrust. The maximum takeoff weight for the 720B was increased to 234,000 lb (106,000 kg). The 720B first took to the skies on October 6, 1960, and received certification and entered service with American Airlines in March 1961;[7] 89 720Bs were built in addition to conversions of American's 10 existing 720s. As a modification of an existing model, the 720 had minimal research and development costs, which allowed it to be successful despite few sales. The company built 154 Boeing 720s and 720Bs from 1959 to 1967. The 720's wing modification was later added on the 707-120B and on 707-120s retrofitted to the B standard. Design The Boeing 720 is a four-engined low-wing cantilever monoplane. Although it was similar to the Boeing 707, compared with the 707-120, it was 8 ft 4 in (2.54 m) shorter in length, and had a lighter structure through use of lighter forged metal parts and thinner fuselage skins and structures. Fuselage The rearmost of the 707's over-wing emergency exits was deleted on each side, which reduced passenger capacity, while two over-wing exits were an option for higher-density configurations. Wings The 720 uses an improved wing based on the 707 wing. The wingspan remained the same as the 707-120. For the 720, the wing was changed between the fuselage and inner engines by adding a wing root glove. This glove reduced the drag of the wing by decambering the root, which reduced the "middle effect", thereby increasing the effective local wing sweep. The wing root glove reportedly increased the drag divergence Mach number of the wing by Mach 0.02. Engines Though initially fitted with turbojet engines, the dominant engine for the Boeing 720 was the Pratt & Whitney JT3D, a turbofan variant of the JT3C with lower fuel consumption and higher thrust. JT3D-engined 720s had a "B" suffix; some of American's 720Bs were conversions of JT3C-powered 720s. Like the 707, the 720/720B used engine-driven turbocompressors to supply high-pressure air for cabin pressurization. The engines could not supply sufficient bleed air for this purpose without a serious loss of thrust. The small air inlets and associated humps are visible just above the main engine inlets on the two inner engine pods of all 720s and 720Bs; the lack of the turbocompressor inlet on the outer starboard pod (number 4 engine) helps spotters distinguish 720/720Bs from most 707s, which had three turbocompressors. For Operational History, click here. Variants 720 First production variant with four Pratt & Whitney JT3C turbojet engines Several high-density seat configurations delivered to Eastern Airlines included four over-wing escape hatches and brake cooling fans to effect quick turns on short-haul sectors.[citation needed] These aircraft, designated "720-025", were certificated to carry up to 170 passengers, provided that certain safety requirements were met. 720B Improved variant with four Pratt & Whitney JT3D turbofan engines; American Airlines converted its 720s to 720B standard.

The Composite Helicopters International KC 518 Adventourer is a composite fuselage, 5-6 place turbine kit helicopter. The KC 518 is a composite fuselage helicopter kit for amateur construction. The airframe uses a carbon fiber and kevlar composite fuselage with a shrouded tail rotor. An auxiliary fuel system can be installed. Variants Other versions with the same fuselage are KC630 with Rolls-Royce RR300 engine in 2017 (priced at US$970,000), KC640 with the RR250 in 2018, and KC650 with the Honeywell LTS101, expected to be certified by 2019. The rights to the KC630 were acquired by Innova Helicopters in 2017.

The Hiller YH-32 Hornet (company designation HJ-1) is an American ultralight helicopter built by Hiller Aircraft in the early 1950s. It was a small and unique design because it was powered by two Hiller 8RJ2B ramjet engines mounted on the rotor blade tips which weigh 13 lb (5.9 kg) each and deliver an equivalent of 45 hp (34 kW) for a total of 90 hp (67 kW). Versions of the HJ-1 Hornet were built for the United States Army and the United States Navy in the early 1950s. The Hiller Museum identifies the YH-32A, named the Sally Rand, as the first helicopter gunship. The Hiller HOE-1 became the first production ramjet helicopter, and the Army and Navy flew a small number of these aircraft for a short time to test and evaluate the technology. The Hiller HJ-1 Hornet was an early attempt to build a jet-powered helicopter using ramjets, with work beginning in 1948. Before that there had been experiments with the XH-26 Jet Jeep tip rotor pulse jets.The HJ-1 ramjet tipped rotor propels the rotor and the aircraft. Unlike a conventional helicopter, this mechanically simple design avoids the need for a tail rotor. Unfortunately, the tip speeds on helicopter rotor blades are subsonic, and ramjets are inefficient at subsonic speeds due to low compression ratio of the inlets. Therefore, the Hornet suffered from high fuel consumption and poor range. Also, the vehicle suffered from low translational speeds, and the ramjet tips were extremely noisy. In the event of power loss, autorotation was found to be difficult due to the drag from the ramjet nacelles. The vehicle exhibited powerful lifting capacity, and there was some hope for military uses, but the high noise, poor range, and high night-time visibility of the ramjet flames failed to attract sales. The first Hiller Hornets were not ready for delivery until late 1954, due to Hiller certificating the aircraft to Civil Aviation Authority standards rather than military specifications. Variants HJ-1 Company designation, one prototype. YH-32 United States Army, Similar to HJ-1 with two small v-shaped stabilizers, 14 built (2 prototypes and 12 production aircraft). YH-32A Two YH-32s modified for trials as an armed helicopter. XHOE-1 Three HJ-1s for evaluation by the United States Navy in 1951. Number built 18.

The Northrop Alpha is an American single-engine, all-metal, seven-seat, low-wing monoplane fast mail/passenger transport aircraft used in the 1930s. Design work was done at the Avion Corporation, which in 1929, became the Northrop Aircraft Corporation based in Burbank, California. Drawing on his experience with the Lockheed Vega, John K. Northrop designed an advanced mail/passenger transport aircraft. In addition to all-metal construction, the new Alpha benefitted from two revolutionary aerodynamic advancements: wing fillets researched at the Guggenheim Aeronautical Laboratory at the California Institute of Technology, and a multicellular stressed-skin wing of Northrop's own design which was later successfully used on the Douglas DC-2 and Douglas DC-3. In addition, the Alpha was the first commercial aircraft to use rubber deicer boots on wing and empennage leading edges which, in conjunction with state-of-the-art radio navigation equipment, gave it day or night, all-weather capability. The aircraft first flew in 1930, with a total of 17 built. The Alpha was further developed into a dedicated fast transport, the Northrop Gamma. The Alpha entered service with Transcontinental & Western Air (TWA) making its inaugural flight on April 20, 1931. The trip from San Francisco to New York required 13 stops and took just over 23 hours. TWA operated 14 aircraft until 1935, flying routes with stops in San Francisco, California; Winslow, Arizona; Albuquerque, New Mexico; Amarillo, Texas; Wichita, Kansas; Kansas City, Missouri; St. Louis, Missouri; Terre Haute, Indiana; Indianapolis, Indiana; Columbus, Ohio; Pittsburgh, Pennsylvania; Philadelphia, Pennsylvania; and New York. Three Alphas were operated by the US military as C-19 VIP transports until 1939. TWA's were initially operated as a passenger service but the Alpha's were later modified at the Stearman factory in Wichita into the cargo-carrying 4A model with a new type certificate. Stearman and Northrop had the same parent company at the time. The third Alpha built, NC11Y, was reacquired by TWA in 1975, and is preserved at the Smithsonian National Air and Space Museum. The Alpha also entered service in the Chinese Nationalist Air Force and placed in the 8th bomber group but were converted into scout bombers during the Second Sino-Japanese War. Variants Alpha 2 (Specifications below) six-passenger version Alpha 3 two-passenger plus cargo version, several Alpha 2s were converted to this configuration Alpha 4 cargo version with 2 ft (0.6 m) increased wingspan and large metal fairings encapsulating the main gear for drag reduction. All were converted from Alpha 3s Alpha 4A cargo version, all converted from Alpha 4s YC-19 & Y1C-19 military VIP transport, seating reduced to four passengers, serial numbers 31–516 to 31-518, YC-19 had a Pratt & Whitney R-1340-7, while the Y1C-19s had the R-1340-11 engine

The Lockheed Model 9 Orion is a single-engined passenger aircraft built in 1931 for commercial airlines. It was faster than any American military aircraft of that time. Designed by Richard A. von Hake, it was the last wood aircraft produced by the Lockheed Aircraft Corporation. The Orion was the last design using many identical elements from the Lockheed designs preceding it. It primarily used all the elements of the Altair, but included a forward top cockpit similar to the Vega, plus the NACA cowling introduced in the Air Express. Lockheed used the same basic fuselage mold and wing for all these wooden designs (the Explorer wing was unique), hence the close similarities between them. The Orion featured an enclosed cabin with seating for six passengers. The Orion received its Approved Type Certificate on 6 May 1931. Gerard F. Vultee was Lockheed's chief engineer in 1928 through 1931 and was involved in the designs of all the Lockheed variants of that time and specifically designed Charles Lindbergh's Sirius. Although designed with the passenger market in mind, its speed made it a natural for air races. The first Bendix race of 1931 had a showing of two Orions, three Altairs and one Vega in a race that had only nine aircraft competing. On 11 July 1935, Laura H. Ingalls flew a Lockheed Orion, powered by a Pratt & Whitney Wasp engine, from Floyd Bennett Field to Burbank, California, establishing an East-West record for women. Two months later she flew it back to set a West-East record. The first Orion entered service with Bowen Air Lines at Fort Worth, Texas, in May 1931. Northwest Airways, later renamed to Northwest Airlines, operated the plane from 1933 to 1935. American Airways, itself also renamed to American Airlines in 1934, operated several 9D Orions. Many safe miles were flown in airline service and the headlines won by a few expert speed pilots proved the advanced design and reliability of the Orion. Those that went into airline use as a passenger transport had their lifespan limited, however. In 1934, the Civil Aeronautics Authority issued a ruling prohibiting further use of single-engined passenger aircraft from operating on all major networks. It also became mandatory to have a copilot and therefore a two-seat cockpit arrangement on all such flights. The requirements of the ruling brought an end to the "Orion" as a passenger-carrying airlines airplane. They were then used for cargo or mail carrying or sold for private use and charter. Because the aircraft had a complicated wood construction and needed to be sent back to Lockheed in Burbank California to be repaired, they were often disposed of after any type of significant accident. At least 12 of the used "Orions" were purchased for service in the Spanish Civil War and destroyed in use. In 1935, a single Model 9 Orion was modified by Lockheed as a news camera plane for the Detroit News. To work in the role, a pod was built into the front leading edge of the right wing about eight feet out from the fuselage. This pod had a glass dome on the front and mounted a camera. To aim the camera the pilot was provided with a primitive grid similar to a gunsight on his windshield. The Orion Explorer was a modified 9E. It had a damaged wing replaced with the wing of the Explorer 7 after a crash, and was fitted with a 600 hp (447 kW) Pratt & Whitney Wasp S3H1 engine. Fixed landing gear and later floats were also fitted. It was used by Wiley Post and Will Rogers for a round-the-world flight attempt, but both men died when the aircraft crashed in Alaska on 15 August 1935. Variants Orion 9 14 built, 410 hp (306 kW) Pratt & Whitney Wasp A or 420 hp (310 kW) Pratt & Whitney Wasp C Orion 9A Special one aircraft with 450 hp (336 kW) Pratt & Whitney Wasp SC engine Orion 9B two aircraft supplied to Swissair, 575 hp (429 kW) Wright R-1820-E engine Orion 9C redesignated Altair DL-2A Orion 9D 13 built[1] Orion 9E three aircraft with 450 hp (336 kW) Pratt & Whitney Wasp SC-1 engine Orion 9F one executive aircraft with a 645 hp (481 kW) Wright R-1820-F2 engine Orion 9F-1 one executive aircraft with a 650 hp (485 kW) Wright R-1820-F2 engine UC-85 one Orion 9D to USAAF in June 1942 Orion-Explorer modified Orion 9E, 600 hp (447 kW) Pratt & Whitney Wasp S3H1 engine Number built 35 or 36

The Northrop F-15 Reporter (later RF-61) was an American unarmed photographic reconnaissance aircraft. Based on the Northrop P-61 Black Widow night fighter, it was the last piston-powered photo-reconnaissance aircraft designed and produced for the United States Air Force. Though produced in limited quantities, and with a relatively short service life, the F-15's aerial photographs of the Korean Peninsula would prove vital in 1950, when North Korea invaded the south. The F-15 Reporter was created when the guns were removed from the experimental XP-61E, the last fighter variant of the P-61 Black Widow. With less than six months flying time, the first XP-61E was taken back to the Northrop modification shop where it was converted into an unarmed photographic reconnaissance aircraft. All the guns were removed, and a new nose was fitted, capable of holding an assortment of aerial cameras. The aircraft, redesignated XF-15, flew for the first time on 3 July 1945, with Northrop test pilot L. A. "Slim" Parrett at the controls. A P-61C-1-NO (serial number 42-8335) was also modified to XF-15 standards as the XF-15A. Apart from the turbosupercharged R-2800-C engines, it was identical to the XF-15 and flew for the first time on 17 October 1945. For unknown reasons Northrop subcontracted the nose for the F-15A to the Hughes Tool Company of Culver City, California. The F-15A used the existing P-61C wings (without fighter brakes), engines and tail sections but with an entirely new, more streamlined fuselage housing a crew of two under a continuous bubble-canopy. As a result of continuing development trouble with the Howard Hughes-designed XF-11, the staff of the Army Air Force Headquarters determined an immediate need for 320 F-15 Reporters. Even before the first flight of the XF-15 an initial contract for 175 aircraft was signed in June 1945. Following testing it was determined that the F-15 Reporter possessed similar performance and flight characteristics to the troublesome XF-11, despite the Reporter being powered by less powerful engines, and using mostly pre-existing parts. This spelled the end to further development of the XF-11. The first production F-15A was accepted in September 1946. However, the contract was abruptly canceled in 1947, possibly because the performance of the aircraft was rapidly being overshadowed by jets, with the last of only 36 examples being accepted by the United States Army Air Forces in April of that year. The last F-15 to be produced (serial number 45-59335) was produced as an F-15A-5-NO, which differed from the Block-1 version mainly in having a new internal camera installation in the nose. It seems that this change had been contemplated for the last 20 F-15s as well, since some records indicate that these were all eventually re-designated as F-15A-5-NO. The F-15 had a revised center pod with pilot and camera operator seated in tandem under a single bubble canopy. The first XP-61E, from which the first XF-15 was converted, had the canopy hinged to the side, while all subsequent XF-15 and production F-15 employed a sliding canopy. The aircraft's six cameras were placed in an elongated nose, replacing the XP-61Es four guns. Production F-15A were powered by the same turbosupercharged R-2800-73 engines as the P-61C. The aircraft had a takeoff weight of 32,145 lb (14,580 kg) and a top speed of 440 mph (382 kn, 708 km/h) at 33,000 ft (10,058 m). In the end, only 36 of the 175 ordered F-15As were built, and all were constructed from aircraft originally contracted to be built as P-61C. Variants XF-15 The first prototype, converted from the first XP-61E. XF-15A The second prototype, converted from a P-61C (number 43-8335). F-15A Reporter Photoreconnaissance variant with a new center pod with pilot and camera operator seated in tandem under a single bubble canopy, and six cameras taking place of radar in the nose. Powered by the same turbosupercharged R-2800-73 engines as the P-61C. The aircraft had a takeoff weight of 32,145 lb (14,580 kg) and a top speed of 440 mph (382 kn, 708 km/h). Only 36 of the 175 ordered F-15As were built before the end of the war. After formation of the United States Air Force in 1947, F-15A was redesignated RF-61C. F-15As were responsible for most of the aerial maps of North Korea used at the start of the Korean War. RF-61C Reporter (Specifications below) USAF designation for the F-15C from 1948 onwards. Number built 36

The Curtiss-Wright AT-9 Jeep is an American twin-engined advanced trainer aircraft used by the United States during World War II to bridge the gap between single-engined trainers and twin-engined combat aircraft. The AT-9 had a low-wing cantilever monoplane configuration, retractable landing gear and was powered by two Lycoming R-680-9 radial engines. Curtiss-Wright anticipated the requirement for this type of "high-performance" aircraft and designed the Curtiss-Wright CW-25, a twin-engined trainer, which possessed the takeoff and landing characteristics of a light bomber. Using the same basic design as the larger Cessna AT-17 Bobcat, the new CW-25 was designed to simulate the demands of multi-engined operations. The design featured a small layout, grouping two Lycoming R-680-9 radial engines forward and using a retractable tailwheel landing gear to achieve the performance necessary to meet the requirements of an advanced trainer. The single CW-25 prototype acquired for evaluation had a welded steel-tube fuselage structure with the wings, fuselage and tail unit fabric-covered. The first prototype Model 25 flew in 1941 and the production version entered service as the AT-9 in 1942. Named the "Fledgling" by Curtiss-Wright, it commonly became known as the "Jeep" in the United States Army Air Forces (USAAF). The prototype CW-25 had a fabric-covered steel tube fuselage and fabric-covered wings and tail units, but production AT-9s were of stressed metal skin construction. The AT-9 was purposely designed to be less stable and proved to be difficult to fly or land, which made it particularly suitable for teaching new pilots to cope with the demanding flight characteristics of a new generation of high-performance, multi-engined aircraft such as the Martin B-26 Marauder and Lockheed P-38 Lightning. A total of 491 AT-9s were built before production ended and a new production run of 300 of the generally similar AT-9A commenced. Because of its difficult flying characteristics, the AT-9 was not offered for sale to civilians after the war, although many non-flying examples were given to ground schools for training purposes. Variants CW-25 Prototype with fabric covered fuselage and tail surfaces AT-9 Production aircraft with stressed-skin covering and two Lycoming R-680-9 radial engines, 491 built. AT-9A AT-9 with Lycoming R-680-11 radial engines and revised hydraulic system, 300 built before production ended in February 1943. Number built 792 (including prototype and AT-9A variant)

The ANF Les Mureaux 110 and its derivatives were a family of all-metal military reconnaissance aircraft developed and produced by the French aircraft manufacturer ANF Les Mureaux. It was designed in response to a requirement issued by the French air ministry. Introduced to service during the 1930s, in excess of two hundred aircraft were procured for the French Air Force to equip not just its frontline units but also to replace aircraft such as the Potez 25s from reserve units. Multiple variants were operated by the service, perhaps most noteworthy was the conversion of 40 aircraft to serve as dedicated night fighters. The family was in widespread usage at the start of the Second World War, and thus saw intense combat during the Battle of France. All remaining aircraft were scrapped in the aftermath of the armistice with Germany. The ANF Les Mureaux 110 originated with a French air ministry requirement for an aircraft to replace the Breguet 19 in Armée de l'Air service in the "R2" two-seat reconnaissance role. ANF Les Mureaux opted to produce a clean-sheet response to this requirement. It was during this design work that the firm developed a new technique for metal construction, it was promptly incorporated into the new long distance observation aircraft, which was later designated 111. Two slightly different variants, the 110 and 111 were presented to the air force for evaluation, and were ordered into production soon thereafter. The first mass-production version was the 113 in 1933, of which 49 examples were purchased. This was supplanted in production by the 115 in 1935 and the 117 later than year. Both these series were given light bombing capability as well. For details of design, operational history and 10 variants, click here.

The Pietenpol Air Camper is a simple parasol wing homebuilt aircraft designed by Bernard H. Pietenpol. The first prototype that became the Air Camper was built and flown by Pietenpol in 1928. The Air Camper was designed to be built of spruce and plywood. One of Pietenpol's goals was to create a plane that was affordable and easy to construct for home builders. Building an Air Camper requires basic woodworking skills and tools. Builders also need to fabricate some metal fittings to attach the wooden parts. Some welding is required. The plans for the Pietenpol Aircamper were originally published in a four-part serial in the "Flying and Glider" Manual of 1932-33. The original model was flown using an Ace four cylinder water-cooled engine. The Model A Ford engine later became the standard powerplant used; the design was first flown with one in May 1929. In the 1960s Bernard Pietenpol began to favor converted engines from Chevrolet Corvair automobiles. The Corvair flat six was higher horsepower, smoother, and significantly lighter, compared to the Model A, and was similar to those already available for general aviation use. The length of a Pietenpol varies with the engine choices, as lighter engines needed to be mounted further forward for weight and balance reasons. Over the years over 30 different engines have flown in the Pietenpol Air Camper. Many modern Pietenpol builders prefer Continental A65, C85 or C90 air-cooled flat fours. Several examples of the Aircamper have been built in Europe and in 2012 were still flying. In the 1920s and 1930s, kits were available for the design, but there were none available again until 2015 when the Pietenpol Aircraft Company introduced a kit version of the Air Camper, with components supplied by Aircraft Spruce & Specialty. The kit includes all parts except the engine, dope, fabric covering, and hardware. For details of variants, click here.

The Falco F8L is an Italian-designed lightweight 2-seater aerobatic aircraft. The aircraft was designed by the renowned Italian designer Stelio Frati in 1955, with the prototype, powered by a 90 hp (67 kW) Continental C-90 engine, flying for the first time on 15 June 1955.[4] The prototype was soon re-engined with a 135 hp (101 kW) Lycoming O-290-D2B, forming the basis for the initial production batch.[4] It was originally built in Italy by Aviamilano then Aeromere and later Laverda. The aircraft is single-engined, propeller driven and designed for private and general aviation use. The Falco was sold in kit or plans form for amateur construction by the Sequoia Aircraft Company of Richmond, Virginia from the 1980s until its closure in 2014. Laverda-built Falco IV from Denmark attending a UK air rally in 1984 The aircraft is widely considered to be one of the best handling, strongest, and most aesthetically pleasing designs ever made available to home builders. Pilots sometimes refer to the Falco as "the Ferrari of the air." Performance includes a 175 knot cruise speed and full aerobatic capability, with an inverted fuel tank an optional item. The Falco F8L is constructed of spruce and typically Finnish birch plywood. The structure is built from laminated spruce bulkheads and the birch plywood is used for the skin. The plywood is often softened with hot steam, formed over the various structures and glued in place. The aircraft is rated for 6g positive and 3g negative. Reviewers Roy Beisswenger and Marino Boric described the design in a 2015 review as "a complex all-wooden construction in spruce and plywood and is therefore time-consuming to build. But the results in terms of weight and speed are remarkable., so much so that the Falco is considered a classic, with outstanding performance and handling." Variants F.8L Series I Initial production model powered by 101 kW (135 hp) Lycoming engine. Ten built by Aviamilano starting in 1956. F.8L Series II Improved model built by Aviamilano, with 112 kW (150 hp) engine. Twenty built. F.8L Series III (Also known as F.8L America) Modified version of Series II built by Aeromere in conformance with US airworthiness requirements. 35 built by Aeromere. Super Falco Series IV (Specifications below) Similar to America, but with more powerful engine (160 hp (120 kW) Lycoming O-320-B3) and constant speed propeller. Built by Laverda.Twenty built. Sequoia Falco Similar to the production aircraft but re-designed for homebuilding from kits or plans,[5] by Alfred Scott of Sequoia Aircraft Company and David Thurston of Lake Buccaneer fame.

he Hirth Hi 27 Acrostar was designed by Arnold Wagner to win aerobatic competitions, in part by having handling independent of orientation, upright or inverted. A single engine, single seat low-wing monoplane, it was built in West Germany by Wolf Hirth GmbH in the early 1970s, and dominated Championships for a brief period. The Hirth Hi 27 Acrostar is a competition aerobatic aircraft designed by the Swiss aerobatic champion, Arnold Wagner. Wagner and three others, two of them German ex-champions, sponsored the construction. The Wolf Hirth team was led by Prof. Richard Eppler of the Stuttgart Technische Hochschule, starting work in the Summer of 1969. The first flight of what was known as the Acrostar Mk II was on 16 April 1970. The Acrostar is a conventionally arranged low wing single engine aircraft. The wing is straight tapered, the leading edge slightly swept and the trailing edge unswept. The aerofoil section, designed by Eppler, is quite thick with a thickness-to-chord ratio of 20%. It is a symmetric section and mounted at zero incidence. There is also zero dihedral. Full span control surfaces are fitted, flaps inboard and proportionally moving ailerons outboard. The ailerons are balanced not by the usual horn or hinge line extensions but by small surfaces which project beyond the wingtips. Unusually, both ailerons and flaps are coupled to the elevator position; this camber changing control system, together with the highly symmetric wing, produces the same control characteristics for normal and inverted manoeuvres. The basic idea in this arrangement was to keep the centerline of the fuselage horizontal in both normal and inverted horizontal flight. The result, beside this, is good controllability in low speed ballistic flight, around zero G. Another unusual control feature, allowing for independent trimming in pitch and yaw, are the independent trim tabs on the flaps. The plywood covered wing is built around a single glass fibre spar using foam reinforced ribs. Aft of the engine, the fuselage is a wooden semi-monocoque. The single seat cockpit is enclosed with a rearward sliding canopy. The fin and balanced rudder are straight tapered and square tipped, as is the rearward set horizontal tail. The prototype had elevator trim tabs but these were removed in favour of the flap trims noted above. Extra fin area is provided by a long strake on the lower fuselage, extending aft to the tailwheel. The Acrostar is powered by a 220 hp (165 kW) Franklin 6A-350-C1 six cylinder horizontally opposed piston engine. This is mounted in a steel frame which is integral with the fixed cantilever main undercarriage and its optionally streamlined, tapering legs and faired wheels. This arrangement places the main landing gear further forward than usual, providing a drag moment to oppose that of the fin in vertical flight. The tailwheel is steerable. For details of operational history, click here.

The Aerocomp VM-1 Esqual is a Swedish ultralight aircraft, produced by Arsi AB (formerly Aerocomp AB) of Alingsås. The aircraft is supplied as a kit for amateur construction or as a complete ready-to-fly-aircraft. The aircraft was originally designed in Spain by Vol Mediterrani to comply with the Fédération Aéronautique Internationale microlight rules and production was later moved to Sweden. It features a cantilever low-wing, a two-seats-in-side-by-side configuration enclosed cockpit, tricycle landing gear or conventional landing gear and a single engine in tractor configuration. Early versions used conventional landing gear but the current manufacturer is producing the nosewheel version. A retractable gear version is under development. The aircraft is made from high density PVC foam and epoxy resin composites. Standard engines available are the 100 hp (75 kW) Rotax 912S, 85 hp (63 kW) Jabiru 2200, 120 hp (89 kW) Jabiru 3300 and the 95 hp (71 kW) ULPower UL260i four-stroke powerplants. The landing gear is made from 7175-T6 aluminum alloy and employs a freely-castering nosewheel and main wheels brakes for steering. The wing features electrically actuated flaps. Manual trim is standard with electric trim optional.

The M&D Flugzeugbau AVo 68 Samburo is a two-seat motor glider, first designed and manufactured in Austria. The aircraft is of typical motorglider configuration, with a tractor propeller and long, tapering wings. As originally designed, it also had a sailplane-like undercarriage consisting of a single mainwheel and a steerable tailwheel; however, later versions have a fixed taildragger undercarriage with two spatted mainwheels. The pilot and passenger sit side by side. With numerous design changes - including modern Rotax engines, state-of-the-art avionics, and aerotow capabilities, it is still in production by the M&D Flugzeugbau company in Germany. Variants AVo 60 Samburo The initial prototype powered by a 60 PS (44 kW) Limbach engine. AVo 68 Samburo Production aircraft powered by 68 PS (50 kW) Limbach engines.

The Buhl LA-1 Bull Pup was a light sports airplane developed in the United States in 1930. It was a mid-wing wire-braced monoplane with fixed tailskid undercarriage and an open cockpit for the pilot. Buhl developed the Bull Pup as a cheap aircraft through which the company hoped to remain in business as the onset of the Great Depression was felt. However, as the economic situation worsened, it became evident that there was no demand for even such a basic aircraft; when production ceased in 1932, all aircraft still in stock were sold off at half price as the company folded. Approximately 100 units were completed. Variants LA-1 Bull Pup LA-1A Bull Pup – version for competition flying with 28 ft wingspan LA-1B Bull Pup – version for high-altitude flying with 32 ft wingspan LA-1S Bull Pup – floatplane version

The MacFam Cavalier is a homebuilt aircraft designed by Stan McLeod, developed through a progressing series of models, all using all-wooden construction. The model range includes the SA102, SA102.5, SA103, SA104 and the SA105. The Cavalier was a new design based on the French wooden homebuilt GY-20 Minicab designed by Yves Gardan in 1949. The plans were translated from French to English and modified by Stan McLeod. The plans were marketed by K&S Aircraft of Calgary, Alberta and later MacFam. The Cavalier is a two-seat side-by-side configuration homebuilt that uses all-wood construction. The landing gear may be configured as fixed, or retractable, in tricycle or conventional layout. The wing uses a single box spar covered in 3/32" plywood leading edge skins. The entire wing is fabric covered. The early Cavalier SA102 series can accept any four cylinder aircraft engine ranging in weight up to 235 lb (107 kg) and 85 to 135 hp (63 to 101 kW), including the Continental O-200, Lycoming O-235 and Franklin 4AC. Later series can use larger engines. SA102 options included wing tip tanks and a third jump seat. Variants SA102 1963 Interchangeable tricycle gear to conventional gear configuration with sliding canopy.[6] SA102.5 1968 model SA103 Conventional gear version of Super Cavalier SA104 Tricycle gear version of Super Cavalier SA105 Super Cavalier (Specifications below) 1968 model retractable tricycle gear model. Engineered for larger 200hp engines.

The Tarragon is a Latvian ultralight aircraft that is produced by Pelegrin LTD since 2012. Tarragon aircraft is tailor-made to each customer, is supplied complete and ready-to-fly. Named for the herb, the Tarragon was developed from the Millennium Master after the manufacturer of that design went bankrupt. The Tarragon ULM sports aircraft has been developed by Pelegrin LTD in conjunction with CFM Air. The Tarragon was designed to comply with the Fédération Aéronautique Internationale microlight rules. It features a cantilever low-wing, an enclosed cockpit with two-seats-in-tandem under a bubble canopy, retractable tricycle landing gear and a single engine in tractor configuration. The Tarragon's airframe is fully made from pre-preg carbon fibre composites. Its 7.94 m (26.0 ft) span wing mounts flaps. Standard engines available are the 100 hp (75 kW) EPA Power SA-R917TNi ULM, the 100 hp (75 kW) Rotax 912ULS and Rotax 912iS, the turbocharged 115 hp (86 kW) Rotax 914, the 135 hp (101 kW) Rotax 915 iS and the 130 hp (97 kW) EPA Power SA917Ti Turbo Injection four-stroke powerplants. In mid-2014 the Latvian ultralight certification was pending. In 2020 it set an unofficial world speed record for ultralight airplanes at 402 km/h (217 kn; 250 mph).

The Tachikawa KKY, full name Tachikawa Army Small and Light Ambulance Aircraft, was designed to rescue injured or sick patients from places without established airfields. Following two earlier prototypes, twenty-one production examples were built between 1936 and 1940 and served in the Second Sino-Japanese War. In August 1932, the Japanese Army placed an order for a small ambulance aircraft, capable of using rough airstrips and holding two stretcher cases and a medical attendant, with what was then the Aeroplane Factory of Ishikawajima Shipbuilding Company. Though the prototype was completed in December 1933, its development was protracted, and it was not ready for production until 1936. By then, the Ishikawajima Company had become the Tachikawa Aeroplane Co. It was a single bay cabin biplane with wings attached to the upper and lower longerons and braced on each side with near-parallel interplane struts. The wings had wooden structures and were fabric-covered. The KKY was powered by a 120–130 hp (89–97 kW) Cirrus Hermes IV four cylinder air-cooled, inverted inline engine and the later KKY-2 by a 150 hp (110 kW) Gasuden Jimpu seven cylinder radial engine. The fuselage had a welded steel tube structure, flat-sided behind the engine, with a windowed cabin that included the pilot's seat just ahead of the wing leading edge with the patients and attendant under the wing. The tail, with an aluminium structure and fabric-covered, was conventional with a tailplane on top of the fuselage and braced to it from below. The vertical tail had a strongly-blunted triangular profile. As its purpose was to rescue patients from rough airfields or unmade airstrips, the ambulance needed a robust undercarriage. This had split axles mounted on a short, central, V-strut from the fuselage underside. Both short, faired shock absorber legs and their rearward drag struts were mounted on the lower fuselage longerons. Wheels with wide, low-pressure tires were available for missions to unmade strips. Twenty-one Aikoku-go (privately funded) production KKYs were built between 1936 and 1940. They were active in the Second Sino-Japanese War, which began in 1937 and became part of World War II, when China entered on the Allies' side shortly after the attack on Pearl Harbor.

The Tomark Skyper GT9 is a Slovakian ultralight and light-sport aircraft, designed and produced by Tomark of Prešov, introduced in 2014. The aircraft is supplied complete and ready-to-fly. The Skyper GT9 was designed to comply with the Fédération Aéronautique Internationale microlight rules and US light-sport aircraft rules and complies with the Czech UL2-1 and ELSA as well as German LTF-UL rules. It was designed for the flight training and touring roles. It features a strut-braced high-wing, an enclosed cabin with two-seats-in-side-by-side configuration accessed by doors, fixed tricycle landing gear and a single engine in tractor configuration. The aircraft is made from aluminum sheet and has a round fuselage profile. Its 9.0 m (29.5 ft) span wing has an area of 10 m2 (110 sq ft) and mounts flaps. Standard engines available are the 100 hp (75 kW) Rotax 912ULS and 912iS four-stroke powerplants. The design is offered in a European UL version with a 472.5 kg (1,042 lb) gross weight and a US LSA version with a gross weight of 600 kg (1,300 lb). As of March 2017, the design does not appear on the Federal Aviation Administration's list of approved special light-sport aircraft. Reviewer Marino Boric described the design in a 2015 review as "ideal for cross country travel".

The Arsenal VB 10 was a French fighter-interceptor aircraft developed during and shortly after World War II. It was a low-wing monoplane with retractable tailwheel undercarriage and of largely orthodox configuration. The ultimate product of a design that began with the Arsenal VG 10 prior to the war, the VB 10 added a second engine behind the cockpit which drove a second propeller, coaxial with and contra-rotating to the propeller driven by the engine in the nose. In January 1937 Arsenal were given a contract to develop a twin-engined heavy interceptor built from wood, powered by two 590 hp Hispano-Suiza 12X engines mounted in tandem inside the fuselage, driving co-axial propellers in the nose. Work on the VG 10 was abandoned in June 1937 in favour of the VG 20, which was essentially similar but powered by two 900 hp Hispano-Suiza 12Y engines. The VG 20 was abandoned in turn in January 1938, but the design work and studies were used for the design of the all-metal VB 10. For research in the development of the VG 10 and VG 20, Arsenal designed and built the VG 30 powered by a single 690 hp Hispano-Suiza 12X engine, which in turn led to the high-performance fighter prototypes of the VG 30 series. Although the aircraft was first designed, and ordered, in 1940, little progress was made during France's occupation, and the prototype did not fly until after VE day. By then, it was already apparent that the future of the fighter lay with jet power, but development of the VB 10 continued as a safety net for France's nascent jet fighter programmes. In December 1945, a contract for 200 machines was placed by the French government, the first of which flew on 3 November 1947. By the time the fourth had been delivered in September 1948, the entire order was cancelled, with the French Air Force relying on surplus British and American fighters to tide it over until domestically produced jet fighters appeared shortly thereafter.

The McDonnell FH Phantom is a twinjet, straight-wing, carrier-based fighter aircraft designed and first flown during late World War II for the United States Navy. As a first-generation jet fighter, the Phantom was the first purely jet-powered aircraft to land on an American aircraft carrier and the first jet deployed by the United States Marine Corps. Although only 62 FH-1s were built it helped prove the viability of carrier-based jet fighters. As McDonnell's first successful fighter, it led to the development of the follow-on F2H Banshee, which was one of the two most important naval jet fighters of the Korean War; combined, the two established McDonnell as an important supplier of navy aircraft. McDonnell chose to bring the name back with the third-generation, Mach 2-capable McDonnell Douglas F-4 Phantom II, the most versatile and widely used Western combat aircraft of the Vietnam War era. The FH Phantom was originally designated the FD Phantom, but this was changed as the aircraft entered production. In early 1943, aviation officials at the United States Navy were impressed with McDonnell's audacious XP-67 Bat project. McDonnell was invited by the navy to cooperate in the development of a shipboard jet fighter, using an engine from the turbojets under development by Westinghouse Electric Corporation. Three prototypes were ordered on 30 August 1943 and the designation XFD-1 was assigned. Under the 1922 United States Navy aircraft designation system, the letter "D" before the dash designated the aircraft's manufacturer. The Douglas Aircraft Company had previously been assigned this letter, but the USN elected to reassign it to McDonnell because Douglas had not provided any fighters for navy service in years. McDonnell engineers evaluated a number of engine combinations, varying from eight 9.5 in (24 cm) diameter engines down to two engines of 19 inches (48 cm) diameter. The final design used the two 19 in (48 cm) engines after it was found to be the lightest and simplest configuration. The engines were buried in the wing root to keep intake and exhaust ducts short, offering greater aerodynamic efficiency than underwing nacelles, and the engines were angled slightly outwards to protect the fuselage from the hot exhaust blast. Placement of the engines in the middle of the airframe, behind the center of gravity, required the cockpit with its bubble-style canopy to be placed ahead of the wing, also granting the pilot excellent visibility in all directions. The long nose allowed designers to use tricycle gear, thereby elevating the engine exhaust path and reducing the risk that the hot blast would damage the aircraft carrier deck. The construction methods and aerodynamic design of the Phantom were fairly conventional for the time; the aircraft had unswept wings, a conventional empennage, and an aluminum monocoque structure with flush riveted aluminum skin. Folding wings were used to reduce the width of the aircraft in storage configuration. Provisions for four .50-caliber (12.7 mm) machine guns were made in the nose, while racks for eight 5 in (130 mm) High Velocity Aircraft Rockets could be fitted under the wings, although these were seldom used in service. Adapting a jet to carrier use was a much greater challenge than producing a land-based fighter because of slower landing and takeoff speeds required on a small carrier deck. The Phantom used split flaps on both the folding and fixed wing sections to enhance low-speed landing performance, but no other high-lift devices were used. Provisions were also made for Rocket Assisted Take Off (RATO) bottles to improve takeoff performance. For more details of development. operational history and variants, click here.

The Messerschmitt Me 323 Gigant ("Giant") was a German military transport aircraft of World War II. It was a powered variant of the Me 321 military glider and was the largest land-based transport aircraft to fly during the war. In total, 213 were made, with 15 being converted from the Me 321. The Me 323 was the result of a 1940 German requirement for a large assault glider in preparation for Operation Sea Lion, the projected invasion of Great Britain. The DFS 230 light glider had already proven its worth in the Battle of Fort Eben-Emael in Belgium (the first ever assault by gliderborne troops), and would later be used in the invasion of Crete in 1941. However, in order to mount an invasion across the English Channel, the Germans would need to be able to airlift vehicles and other heavy equipment as part of an initial assault wave. Although Operation Sea Lion was cancelled, the requirement for a heavy air transport capability remained, with the focus shifting to the forthcoming Operation Barbarossa, the invasion of the Soviet Union. Early in 1941, as a result of feedback from Transport Command pilots in Russia, the decision was taken to produce a motorized variant of the Me 321, to be designated Me 323. French Gnome et Rhône GR14N radial engines, rated at 1,180 PS (1,164 hp, 868 kW) for take-off as used in the Bloch MB.175 aircraft were chosen for use. This would reduce the burden on Germany's strained industry. Like the Me 321, the Me 323 had massive, semicantilever, high-mounted wings, which were braced from the fuselage out to the middle of the wing. To reduce weight and save aluminium, much of the wing was made of plywood and fabric, while the fuselage was of metal-tube construction with wooden spars and covered with doped fabric, with heavy bracing in the floor to support the payload. The "D" series had a crew of five - two pilots, two flight engineers, and a radio operator. Two gunners could also be carried. The flight engineers occupied two small cabins, one in each wing between the inboard and centre engines. The engineers were intended to monitor engine synchronisation and allow the pilot to fly without worrying about engine status, although the pilot could override the engineers' decisions on engine and propeller control. For more details of development, design, operational history and 18 variants, click here.

The Jeffair Barracuda is a high-performance sporting monoplane that was developed in the United States in the 1970s and is marketed for homebuilding. Designed and built by Geoffrey Siers, the prototype won the prize for "Most Outstanding New Design" at the EAA Fly-in in 1976. It was a low-wing cantilever monoplane of wooden construction with retractable tricycle undercarriage and side-by-side seating for two. Around 150 sets of plans had sold by 1977. Geoffrey Siers was a former RAF pilot and engineer for Boeing in 1967. He set out to design an aircraft that was fast, aerobatic, two place, and had range to fly long cross-country flights. The aircraft was refined after a full size cockpit mockup was made. The lightweight construction of the plywood-covered wooden de Havilland Mosquito was the inspiration for the materials choice. The retractable landing gear came from a Piper PA-24 Comanche. The wings were a three-piece design. Test flights were performed in 1975. The aircraft takes off at 70 mph (113 km/h) and climbs at 2000 feet per minute (10.2 m/s). Full flap stalls were recorded as low as 54 mph (87 km/h).

The Metal Aircraft Flamingo was a monoplane produced in Cincinnati, Ohio by the Metal Aircraft Corporation in the 1930s. The Metal Aircraft Corporation purchased the design from the Halpin Development Co. and unveiled it at the 1929 National Air Races with Elinor Smith. Following an accident at Bowman Field in May 1928, the prototype Flamingo was redesigned with a different nose, windscreen, and tail. The interior was insulated with Balsam-Wool Blanket. The Flamingo was first flown from Lunken Airport on 8 April 1928 by Thomas E. Halpin. At one point, the aircraft carried an African-American porter in a red suit named Benny Smith. Following a teaser, marketing for the new airplane began in March 1929 and dealers were being solicited by the following month. One G-2-W, named El Rio Caroní, is best remembered for its role in the discovery of Angel Falls by Jimmy Angel in 1935. Although well known to the local indigenous population, the falls had been glimpsed only by European explorers until Jimmy Angel crash-landed while attempting to land above the falls on Auyán-tepui during gold exploration. The Metal Aircraft Corporation Flamingo that crashed above the falls was recovered by helicopter in the 1960s by the Venezuelan government and is on display at the entrance of the Ciudad Bolívar airport, in Venezuela. A replica was put in its place for visitors of the crash site. Other operators included the Mason & Dixon airline. Another operator of the aircraft was United States Airways which flew a route from Denver to Kansas City in the early 1930s. Stops were made Goodland, Salina, and Topeka, Kansas. Number built 21 Variants Halpin Flamingo six-passenger 410hp P&W G-1 five-passenger 450hp P&W G-2 six-passenger G-2-H six-passenger 525hp P&W G-2-W (Specifications below) eight-passenger 410hp P&W G-MT-6 five-passenger 410 or 525 P&W

The Kalinin K-5 was an airliner produced in the Soviet Union in the 1930s, built in larger quantities than any other Soviet airliner of its time, with some 260 aircraft constructed. It was a conventional, high-wing, strut-braced monoplane with a fully enclosed cabin and cockpit, and followed the general pattern developed by Kalinin in his earlier designs, though on a larger scale. Kalinin had first considered an airliner for 10-12 passengers as early as 1926, but it was not until Ukrvozdukhput expressed interest in such a machine late the following year that work on the design began in earnest. The prototype was ready by mid-autumn 1929, and first flew on October 18 with Mikhail Artemevich Snegirev at the controls. Safety trials for the State Commission commenced on 30 May 1930, and were passed successfully. Ongoing problems with the aircraft's Gnome et Rhône-built Bristol Jupiter engine resulted in the second prototype being powered by a Pratt & Whitney Hornet instead. This machine undertook further testing and a number of promotional flights before series production of the K-5 commenced. Early production examples were used on trial services between Kharkiv and Moscow, Mineralnye Vody, and Baku. Problems with the Bessonov M-15 engines became quickly apparent, with frequent failures and operational lifespans measured in only dozens of hours. K-5 operations were suspended by the Inspectorate of Civil Aviation until the issues were resolved. Kalinin turned to the Shvetsov M-22 as an alternative powerplant. While reliability increased, this engine installation also created more drag than the M-15 had, and performance decreased accordingly. State Acceptance trials carried out in May–June 1932 confirmed the reliability of the engine with 550 takeoffs and landings and 2,000 steep turns, but found that the payload capacity was now unacceptably low. By this time, however, the M-15 had become reliable enough for restrictions to be lifted and K-5 production resumed, and eventually about 100 K-5s were fitted with this engine. The reliability of the revised M-15 design was vindicated by a gruelling flight through the Caucasus on 25 June 1933. Eventually, the Mikulin M-17F provided the definitive powerplant for the K-5, offering an increase in power and performance over the M-15, but decreasing the aircraft's payload and range due to its greater weight. The new engine also required strengthening of the wing design; the first K-5 fitted with this engine suffered structural damage during flight tests due to the increase in engine power. The K-5 was widely used by Aeroflot, displacing German-built Junkers F 13s and Dornier Komets in regular service. The first scheduled route flown by K-5s was Moscow-Kharkov, followed by services between Moscow and Sverdlovsk, Tashkent, and Arkhangelsk. They remained in service until 1940, becoming the backbone of Aeroflot's domestic operations. The K-5 was also used by the Soviet Air Force as a transport aircraft, operating in this capacity until 1943.

The Isaacs Spitfire is a single seat homebuilt sporting aircraft design created by John O. Isaacs, a former Supermarine employee and retired schoolmaster and designer of the Isaacs Fury, as a 6/10th scale replica of a Supermarine Spitfire. Its first flight was on 5 May 1975. As per the original Spitfire, the Isaacs Spitfire was a cantilever low-wing monoplane of semi-elliptical planform. The twin spar wing was built in one piece, mainly of spruce with birch plywood skin. The fuselage was of identical construction. The landing gear is fixed and included a tailwheel. Plans are available for sale to home constructors.

The Griffon Lionheart is an American single-engined, six-seat biplane designed and produced in kit form for home building by Griffon Aerospace of Harvest, Alabama. The Lionheart is based on the Beechcraft Staggerwing biplane of the 1930s but unlike the steel tube, wood and fabric construction of the Staggerwing it has a composite structure. The Staggerwing has strut-braced wings but the Lionheart has cantilever wings with a total area about 20% less than the wings of the Staggerwing. It is powered by a 450 hp (336 kW) Pratt & Whitney R-985 Wasp Junior radial engine with a three-bladed propeller. It has a retractable conventional landing gear with a tailwheel. The enclosed cabin is slightly longer than the Staggerwing's cabin to allow room for the pilot and five passengers, and it has a split airstair access door on the port side. The Lionheart first flew on 27 July 1997 and was first displayed in public at EAA AirVenture Oshkosh a few days later. Five kits were sold by April 1998, and two of the kits were completed by 2001, with another almost complete. As of August 2011, three Lionhearts are registered in the United States, with another example on display in an aviation museum at Tullahoma Regional Airport in Tullahoma, Tennessee. Kits are no longer being produced.

The Fulton FA-2 Airphibian is an American roadable aircraft manufactured in 1946. Designed by Robert Edison Fulton Jr., it was an aluminum-bodied car, built with independent suspension, aircraft-sized wheels, and a six-cylinder 165 hp engine. The fabric wings were easily attached to the fuselage, converting the car into a plane. Four prototypes were built. In December 1950, the Civil Aeronautics Administration (CAA) (later to become the FAA) certified one of the prototypes and gave it an 1A11 Aircraft Specification, N74104. Lou Achitoff, was the CAA test pilot. The N74154 is the aircraft that is today in the main building of the National Air and Space Museum in Washington, DC, having previously been on display in the Steven F. Udvar-Hazy Center. The craft made its debut in November 1946 at Danbury, Connecticut. Financial concerns forced Fulton to sell to a company that never developed it. Only four aircraft had been completed. The Airphibian took the approach of converting from an aircraft to a roadable vehicle by a conversion process that left aircraft sections behind during road use. The process consisted of removing a three-bladed propeller and placing it on a hook on the side of the fuselage, cranking down support casters, and disengaging lock levers connecting the flight unit to the road unit. The wing and aft fuselage are detached for road use. In the mid-1990s, one of the surviving Airphibians was restored by Fulton III, along with David Dumas and Deborah Hanson. Later, it was put on display for several years at the Canada Aviation Museum in Ottawa, Ontario, Canada in their main display hall, but in 2009 it moved to the Steven F. Udvar-Hazy Center (annex of the National Air and Space Museum).[6] Since 2022 it has been on display in the National Air and Space Museum in Washington, DC.

The FMA 20 El Boyero ("Shepherd") was a light utility aircraft produced in Argentina in the 1940s. It was a conventional high-wing strut-braced monoplane with a fixed tailskid undercarriage, seating two side by side in an enclosed cabin. The Fábrica Argentina de Aviones (FMA) began design work on the El Boyero in 1939, to meet the needs of Argentine flying clubs for a training aircraft. Two prototypes were built, with the first, powered by a 50 hp (37 kW) Continental A50 flat four engine, flying on 2 November 1940, and the second early the following year. The El Boyero was a single-engine tractor high-wing monoplane, with a fixed tailwheel undercarriage. Its fuselage had a steel tube structure with fabric covering, while the aircraft's wing, which was braced to the fuselage with steel tube struts, had spars of spruce, with ribs of aluminium alloy. Pilot and instructor sat side-by-side in an enclosed cabin, and were provided with dual controls. As FMA was busy building military aircraft production rights were sold to the private firm Sfreddo y Paolini [es] but they were unable to start production due to a shortage of materials and equipment as a result of the Second World War. After the end of the war, production rights were re-assigned to Petrolini Hermanos. This company received an order for 160 aircraft from the Argentine government, and commenced deliveries in January 1949. The aircraft, powered by 65 hp (48 kW) Continental A65-8 or 75 hp (56 kW) Continental A-75 engines, were distributed to Argentina's aeroclubs and to the military, which used it as a spotter and liaison aircraft. Petrolini experienced great difficulties sourcing sufficient materials to complete the order, and in 1951 ceased production, having completed 130 aircraft.

The XCG-16 was a military transport/assault glider ordered by the United States Army Air Forces (USAAF), from General Airborne Transport Co., for competition against the Waco CG-13A at Wright Field. The XCG-16’s preferred tow aircraft was the Lockheed Model 18 Lodestar. Design of the CG-16 evolved from the lifting fuselage theories of Vincent Burnelli laid out in U.S. Patent No. 1,758,498, issued on 13 May 1930, which advocated the use of "lifting fuselages" providing a high proportion of the total lift. To enter a competition at Wright Field for a new assault glider for the USAAF, Hawley Bowlus and Albert Criz designed a Burnelli style lifting fuselage assault glider as the Bowlus-Criz MC-1. To prove the concept and aerodynamic qualities Bowlus designed a 1:2 scale prototype, which flew successfully. The flight tests of the 1:2 scale MC-1 maintained confidence in the full-sized glider. A contract for three MC-1 gliders, two flyable and one for static testing, was given to the Airborne and General aircraft company, which had been formed by Bowlus and Criz. This company soon transformed into the General Airborne Transport company, which built the full sized MC-1 gliders with the military designation XCG-16. Flight tests of the full sized MC-1, registered to the Albert Criz company on 19 July 1943 as NX21757, commenced at March Field, California, on 11 September 1943, but tragedy struck on a demonstration flight with Richard Chichester du Pont, special assistant to Gen. Hap Arnold; Col. Ernest Gabel, another glider specialist on the staff of the Chief of Staff of the Air Force, and C. C. Chandler, thrice soaring champion aboard. Inadequately secured ballast came loose when the glider flew through the Lockheed C-60 tow plane's propwash, causing a catastrophic rearward shift in the center of gravity. The now uncontrollable MC-1A released from tow and entered an unrecoverable flat spin. Three of the crew and passengers jumped out, but only two survived the parachute jump. In spite of all the design problems and the MC-1 crash, a contract was approved on 13 November 1943 for two test flight articles and one static test article of the MC-1 glider designated as the USAAF XCG-16. Only one XCG-16, (44-76193), was manufactured and tested, demonstrating good flying qualities, but major issues with military equipment and procedures precluded the CG-16 from a production contract, as it did not meet military expectations as a combat glider. The contract for all remaining work on the CG-16 was cancelled on 30 November 1944. Variants Bowlus-Criz MC-1 half-scale A flying 1:2 scale model of the MC-1/XCG-16. Successful flight trials proved the aerodynamic qualities of the MC-1. After completion of CG-16 related flying the 1:2 scale MC-1 was converted to a flying wing by Don Mitchell, one of Hawley Bowlus' friends and a colleague at Bowlus Sailplanes. Airborne and General MC-1 The full-scale civilian prototype of the CG-16, destroyed on its second flight during a demonstration flight. General Airborne Transport XCG-16 Three prototypes of the military XCG-16 were ordered, but only one was completed as 44-76193. Trials revealed major deficiencies in the ability of the CG-16 to fulfill the intended mission, despite good flying qualities.

The Piaggio P.108 Bombardiere was an Italian four-engine heavy bomber that saw service with the Regia Aeronautica during World War II. The prototype first flew on 24 November 1939 and it entered service in 1941. It was one of a handful of Italian combat aircraft that could match the best manufactured by the Allies. Four versions of the P.108 were designed, but only one, the P.108B bomber, was produced in any quantity before the armistice. The other variants included the P.108A anti-ship aircraft with a 102 mm (4 in) gun, the P.108C, an airliner with an extended wingspan and re-modelled fuselage capable of carrying 32 passengers, and the P.108T transport version designed specifically for military use. Only one P.108A and 24 P.108Bs were built. The combined total number of all versions (and prototypes) was at least 39, almost certainly more than 44. Most of the P.108Cs were subsequently modified for use as military transport aircraft and could accommodate up to sixty passengers.[5] Nine P.108 Ts were used by Luftwaffe transport units until the end of the war. Number built 36 + 1 prototype (P.108B bombers); 12 + 1 prototype (P.108T transport) For details of design and development of the variants, click here.

The Fiat CR.42 Falco (Falcon, plural: Falchi) is a single-seat sesquiplane fighter developed and produced by Italian aircraft manufacturer Fiat Aviazione. It served primarily in the Italian Regia Aeronautica in the 1930s and during the Second World War. The CR.42 was a development of Fiat’s earlier CR.32 fighter, powered by the more powerful supercharged Fiat A.74R1C.38 air-cooled radial engine and with improvements. It proved to be relatively agile in flight, attributed to its very low wing loading and a sometimes decisive tactical advantage. RAF Intelligence praised its exceptional manoeuvrability, further noting that "the plane was immensely strong", though it was technically outclassed by faster, more heavily armed monoplanes. While primarily used as a fighter, variants such as the CR.42CN night-fighter model, the CR.42AS ground-attack aircraft, and the CR.42B Biposto twin-seat trainer aircraft had other roles. During May 1939, the CR.42 entered service with the Regia Aeronautica; it was the last of the Fiat biplane fighters to enter front line service. By 10 June 1940, when Italy entered the Second World War, roughly 300 had been delivered; these defended metropolitan areas and important military installations at first. By the end of 1940, the Falco had been involved in combat on various fronts, including the Battle of France, the Battle of Britain, Malta, North Africa, and Greece. By the end of the war, Italian CR.42s had been used on further fronts, including Iraq, the Eastern Front and the Italian mainland. Following the signing of the Italian armistice with the Allies on 8 September 1943, the type was relegated to use as a trainer by the Italian Co-Belligerent Air Force, while some Italian CR.42s were seized by the Germans and used by the Luftwaffe for ground-attack operations. The CR.42 was produced and entered service in smaller numbers with the air forces of other nations, including Belgium, Sweden and Hungary. By the end of production, in excess of 1,800 CR.42s had been constructed, making it the most numerous Italian aircraft to be used during the Second World War. It has been claimed that the fighter had performed at its best during its service with the Hungarian Air Force, specifically during its deployment against Soviet forces on the Eastern Front of the war, where it reportedly achieved a kill to loss ratio of 12 to 1. Number built 1,817–1,819; First flight 23 May 1938; Retired 1948 For more details of development, design, operational history and 13 variants, click here.

The Messerschmitt Me 410 Hornisse (Hornet) is a heavy fighter and Schnellbomber ("Fast Bomber" in English) designed and produced by the German aircraft manufacturer Messerschmitt. It was flown by the Luftwaffe during the latter half of the Second World War. Work began on producing a successor to the Bf 110 in 1937, however, the resulting Me 210 proved to be unsatisfactory, leading to production being halted in April 1942. Various options were considered, including the ambitious Me 310 derivative. Officials favoured an incremental improvement which was represented by the Me 410. Although visually similar to the preceding Me 210, and was sharing sufficient design similarities that incomplete Me 210s could be converted into Me 410s, there were key differences between the two aircraft. Chiefly, the Me 410 was powered by larger Daimler-Benz DB 603 engines, had a lengthened fuselage, and automatic leading edge slats. During late 1942, the Reichsluftfahrtministerium (RLM) were sufficiently convinced by the programme to proceed with quantity production of the type, the first Me 410s being delivered during January 1943. Various models were produced, including the Me 410A-1 light bomber, the A-1/U1 aerial reconnaissance aircraft, the A-1/U2 bomber destroyer, and the A-2/U4 night fighter. Upon their entry to service, the type was promptly flown on night time bombing missions in the British Isles, where the night fighters of the Royal Air Force (RAF) typically struggled to intercept it.[2] The Me 410 was also used as a bomber destroyer against the daylight bomber formations of the United States Army Air Forces (USAAF); it was moderately successful against unescorted bombers through 1943, but proved to be no match in a dogfight with the lighter Allied single-engine fighters, such as the North American P-51 Mustang and Supermarine Spitfire. Following the Normandy landings, Me 410s were amongst the numerous Axis aircraft sent against the incoming Allied forces. From mid-1944, all Me 410s were withdrawn from Defence of the Reich duties and production was phased out in favour of heavily armed single-engine fighters as dedicated bomber destroyers. The final role of the Me 410 was aerial reconnaissance. Only two Me 410s have survived in preservation into the twenty-first century. Number built 1,189; First flight 14 March 1942; Retired 1945 Fpr details of development, design, operational history and variants, click here.

The Davenport BD-2 Nuggit (sic) is an American biplane developed for homebuilt construction. The B-2 Nuggit is a single place biplane with conventional landing gear. The cockpit is covered with a sliding bubble canopy. The fuselage is welded steel construction with aircraft fabric covering. A round cowling covers the engine to appear like a radial engine installation. The wing uses a wooden spar with aluminum wing ribs.

The Falconar SAL Mustang, also called the 2/3 Mustang and the SAL P-51D Mustang is a Canadian amateur-built aircraft, originally produced by Falconar Avia and introduced in 1969. The aircraft is a 2⁄3 scale replica of the North American P-51 Mustang and is supplied as a kit or as plans for amateur construction. Since the winding up of business by Falconar Avia in 2019, the plans are now sold by Manna Aviation. In 1963 Falconar partnered with designer Marcel Jurca to produce the Jurca Gnatsum. By 1967, Falconar recommended a large number of changes to the design, which resulted in Jurca leaving the project. The modified aircraft was developed as the SAL Mustang and first flown in 1971 after significant cost overruns. Falconar Aircraft Ltd was sold to George F. Chivers and other investors, and operated as Sturgeon Air Ltd (SAL) with Falconar as an employee until 1973.[4] The SAL Mustang features a cantilever low-wing, a single-seat, or optionally a two-seats-in-tandem, enclosed cockpit under a bubble canopy, retractable conventional landing gear, including a manually retractable tailwheel and a single engine in tractor configuration. The aircraft is made from wood covered with fibreglass cloth and doped aircraft fabric. Some parts, like the belly air scoop are made from fibreglass. Its 24.8 ft (7.6 m) span wing has an area of 110 sq ft (10 m2) and mounts flaps that may be electrically or manually operated. The cockpit is 24 in (61 cm) wide and the bubble canopy is jettisonable. The aircraft's recommended engine power range is 200 to 350 hp (149 to 261 kW). Engines that have been used include the 200 hp (149 kW) Lycoming IO-360 horizontally opposed engine, the 200 hp (149 kW) Ranger L-440 inverted inline, the 180 to 235 hp (134 to 175 kW) Avia M 337 inverted inline, 230 hp (172 kW) Continental O-470 horizontally opposed, the 200 hp (149 kW) Ford 230 cu in (3.77 L) V6 automotive conversion, as well as other automotive V-6 or V-8 powerplants. Construction time from the supplied kit is estimated as 2500 hours. The paper plans supplied total an area of 450 sq ft (42 m2), weigh 13 lb (5.9 kg) and include a construction manual. An alternative set of plans allows constructing a tandem two-seat version. The plans are very detailed and complete and one builder rated them as "the best I have seen on any homebuilt airplane". The prototype was introduced at the 1971 EAA airshow painted in the same gold and red colors as the Canadian Golden Hawks airshow team. In July 2012 the manufacturer indicated that 18 examples had been completed and flown in the 43 years that the plans and kits had been available.

The Mooney M-18 "Mite" is a low-wing, single-seat monoplane with retractable, tricycle landing gear. The Mite was designed by Al Mooney and was intended as a personal airplane marketed to fighter pilots returning from World War II. The M-18 design goal was extremely low operating costs. The Mite is constructed mainly of fabric-covered wood, with a single spruce and plywood "D" wing spar. The wing aft of the spar is fabric-covered. The airfoil selected for the design was the NACA 64A215. The M-18 represented the first time a NACA 6-series airfoil had been used on a civil aircraft after World War II. The aircraft featured a unique "safe-trim" system. This mechanical device links the wing flaps to the tail trim system and automatically adjusts the horizontal stabilizer angle when the flaps are deflected, reducing or eliminating pitch changes when the flaps are lowered. The Mooney Aircraft Corporation built a total of 283 Mites in Wichita, Kansas, and Kerrville, Texas, between 1947 and 1954. The first seven were powered by belt driven, modified 25 hp (19 kW) Crosley automobile engines, but these proved to be troublesome. Production shifted to the M-18L powered by the four-cylinder, 65 hp (48 kW) Lycoming O-145 powerplant. The original Crosley-powered Mites were recalled and retrofitted with the Lycoming engines at no charge. The later M-18C used the Continental A65 65 hp (48 kW) aircraft engine. The market for the single-seat M-18 was limited, so Mooney later developed the four-seat M-20 to appeal to aircraft owners with families. In the early 1970s, Mooney offered plans for four different home-built versions of the M-18. Factory production of the Mite ended in 1954. Leading up to this, the company was losing $1000 on each plane, which accelerated the development of the M20. Another factor was that Continental had ceased production of the engine used in the Mite due to a lack of demand. A total of 283 Mites were constructed.

The Kamov Ka-26 (NATO reporting name Hoodlum) is a Soviet light utility helicopter with co-axial rotors. It looks like it has twin turbine engines in nacelles on each side of the body, but they are radial engines with turbofans for cooling. The Ka-26 entered production in 1969 and 816 were built. A variant with a single turboshaft engine is the Ka-126. A twin-turboshaft–powered version is the Ka-226. (All the Ka-26/126/128/226 variants are code-named by NATO as "Hoodlum"). The fuselage of the Ka-26 consists of a fixed, bubble-shaped cockpit containing the pilot and co-pilot, plus a removable, variable box available in medevac, passenger-carrying and crop duster versions. The helicopter can fly with or without the box attached for flexibility. It is powered by two 325 hp (239 kW) Vedeneyev M-14V-26 radial engines mounted in outboard nacelles. The Ka-26 is small enough to land on a large truck bed. The reciprocating engines are more responsive than turboshaft engines, but require more maintenance. It runs mostly at 95% power in crop dusting with usually excess payload, leaving little reserve power for emergencies. Due to frequent overloads, the interconnect shaft joining the two engines is prone to breakage and requires frequent inspection. The standard instrumentation of the Ka-26, like larger naval Kamovs, may be overkill for civilian or crop dusting use. The 18-dials cockpit panel masks a part of the right-downwards view, needed to avoid telephone and power lines at low altitudes. The instrument panel may be simplified to retain the six main dials. As there is a low rotor clearance at the aircraft front, it is approached from the rear when the rotors are turning. Due to the limitations of the Ka-26, USSR and Romania agreed under the Comecon trade to build a single-turboshaft engine version, the Kamov Ka-126, with better aerodynamics and range. The Ka-26 is eminently useful for civil agricultural use, especially crop dusting. The coaxial main rotor configuration, which makes the Ka-26 small and agile, also results in a delicate airflow pattern under the helicopter, providing a thorough, yet mild distribution of chemicals onto plants. The Ka-26 is often used to spray grape farms in Hungary, where conventional "main rotor and tail rotor" layout helicopters would damage or up-root the vine-stocks with their powerful airflow. Hungarian Kamov operators claim that coaxial rotors of the Ka-26 creates an airflow which allows well-atomized pesticides to linger longer in the air, causing more of the residue to settle underneath, rather than on top of, the leaves. This results in a more efficient distribution of pesticides, as most pests and parasites do not live on the top side of foliage. Additionally, the coaxial vortex system is symmetrical, allowing the distribution of the pesticide to be more uniform, without the side currents induced by the tail rotor, making it easier to avoid contaminating adjacent non-crop areas. In some Warsaw Pact armies, the Ka-26 was used only in the light paratroop or airborne role, but not the civilian agricultural role[citation needed]. In the military role, its slow (150 km/h) cruise speed compared with the Mi-2 (220 km/h) limits effective general-purpose military use, although its shorter length (7.75 m) compared with the Mil Mi-2 (11.9 m) and smaller rotor diameter (13 m vs. 14.6 m) are advantageous for military operations in an urban area. Its operational range is also greater than the Mil-2. On 30 June 2020, Moldovan police and prosecutors closed down an illegal factory producing unlicensed copies of the Ka-26. The factory had a production line with ten air frames in various stages of completion that were intended for sale to clients in former Soviet countries. Variants Ka-26 Hoodlum-A One- or two-crew utility light helicopter, powered by two 325-hp (239-kW) VMK (Vedeneyev) M-14V-26 radial engines. 850 built. Ka-26SS NOTAR technology testbed for the Ka-118 fitted with tail jet beams. Ka-126 Hoodlum-B One- or two-crew utility light helicopter, powered by one 720-shp (537-kW) OMKB "Mars" (Glushenkov) TVD-100 turboshaft engine. First flown in 1986, built and developed by Industria Aeronautică Română in Romania. 2 prototypes and 15 series helicopter built. V-60 A prototype light armed escort helicopter based on the Ka-126. Ka-128 One prototype, powered by a 722-shp (538-kW) Turbomeca Arriel 1D1 turboshaft engine. Kamov Ka-226 Six- or seven-seat utility helicopter, powered by two 450-shp (335-kW) Rolls-Royce (Allison) 250-C20R/2 turboshaft engines.

The Westland Welkin was a British twin-engine heavy fighter from the Westland Aircraft Company, designed to fight at extremely high altitudes, in the stratosphere; the word welkin meaning "the vault of heaven" or the upper atmosphere. First conceived in 1940, the plane was built in response to the arrival of modified Junkers Ju 86P bombers flying reconnaissance missions, which suggested the Luftwaffe might attempt to re-open the bombing of England from high altitude. Construction was from 1942 to 1943. The threat never materialised; consequently, Westland produced only a small number of Welkins and few of these flew. Westland put forward their P.14, essentially an adaptation of Westland's Whirlwind fighter layout (and a more experimental twin, the P.13) to meet Air Ministry Specification F.4 of 1940 for a high altitude fighter. The most obvious feature was the enormous high aspect ratio wing, with a span on the production aircraft of 70 feet (21 m). The compact but troublesome Rolls-Royce Peregrine engines of the Whirlwind were replaced by the more powerful two-stage Rolls-Royce Merlin Mk.76/77. The most significant feature was a pressurised cockpit, which took the majority of effort in the design. After extensive development a new cockpit was developed that was built out of heavy-gauge duraluminium bolted directly to the front of the main spar. The cockpit hood used an internal layer of thick perspex to hold the pressure, and an outer thin layer to form a smooth line. Heated air was blown between the two to keep the canopy clear of frost. In January 1941, the Ministry of Aircraft Production authorised the building of two P.14 prototypes DG558 & DG562. The F.4/40 specification was revised into F.7/41 that year. The Welkin design was now in competition with the Vickers Type 432 with Merlin 61 engines. The pressurisation system was driven by a Rotol supercharger attached to the left-hand engine (this was the difference between the Merlin 76 and 77), providing a constant pressure of 3.5 psi (24 kPa) over the exterior pressure. This resulted in an apparent cabin altitude of 24,000 feet (7,300 m) when the aircraft was operating at its design altitude of 45,000 ft (14,000 m). This cabin altitude was still too high for normal breathing, so the pilot had to wear an oxygen mask during flight. A rubber gasket filled with the pressurized air sealed the canopy when the system was turned on, and a valve ensured the pressure was controlled automatically. Moreover, the pilot also had to wear a high altitude suit as he might have been required to bail out at altitude. The Welkin required a sophisticated electrical system. This was to minimise the number of seals and points of entry in the cockpit for the controls and instrumentation. It took an electrician experienced in the features of the Welkin four hours to undertake a pre-flight check of this system. The wings were so large that the high lift Fowler flaps of the Whirlwind were not needed, and were replaced by a simple split flap. The extra wing area also required more stability, so the tail was lengthened to provide a longer moment arm. The armament − four Hispano 20 mm cannon − was the same as the Whirlwind's, but the Welkin carried the guns in a tray in its belly, which facilitated loading. In that position, muzzle flash was also less likely to dazzle the pilot. The Welkin was seriously handicapped by compressibility problems caused by its long, high aspect-ratio wing which needed to be thick at the root (thickness-to-chord ratio of about 19%) for strength reasons. Compressibility caused the flight envelope (flyable speed range) between high-incidence stall and shock-stall to become very small at high altitudes – any decrease in airspeed causing a "normal" stall, any increase causing a shock-stall due to the aircraft's limiting critical Mach number. This reduction of the speed envelope is a problem common to all subsonic high-altitude designs and also occurred with the later Lockheed U-2. When W.E.W. Petter came to design his next high-altitude aircraft, the English Electric Canberra jet bomber, the required wing area was distinguished by noticeably short wings, with thickness-to-chord ratio (t/c) at the root of 12%, a t/c ratio which delays compressibility effects to an aircraft speed of about Mach 0.85. Information on the Welkin was only released at the end of the war. A two-seat radar-equipped night fighter version known as the Welkin NF.Mk.II for specification F.9/43 was developed but only one was eventually produced as the variant was not ordered into production. By the time the Welkin Mk.I was complete and in production, it was apparent that the Luftwaffe was no longer conducting high altitude missions, due largely to successful interceptions by specially modified Supermarine Spitfires. Only 77 complete Welkins were produced, plus a further 26 as engine-less airframes.[10] Although two Welkins served with the Fighter Interception Unit based at RAF Wittering from May to November 1944, where they were used to gain experience and formulate tactics for high altitude fighter operations, the Welkin was never used operationally by the RAF. Variants P.14: Two prototypes built to meet Air Ministry Specification F.7/41. Welkin Mk.I : Single-seat twin-engine high altitude fighter aircraft, 75 built, further 26 aircraft were completed without engines. Welkin Mk.II : Two-seat night fighter prototype, one converted from Mark I.

The Buhl AirSedan was a family of American civil cabin sesquiplane aircraft developed and manufactured by the Buhl Aircraft Company in the late 1920s. One example completed the first transcontinental non-stop roundtrip flight, made in 1929 by the CA-6 Spokane Sun-God, and the first Pope to have flown did so in a Buhl Airsedan. The Airsedan series were designed by Etienne Dormoy following the departure of Alfred V. Verville from Buhl, with whom he had worked previously. Dormoy had worked with Deperdussin before World War I, flew combat operations during the war before returning to work with SPAD, travelled to the US to coordinate production of SPADs with Curtiss until the project was cancelled with the end of the war. He then worked with Packard on automobiles for a year in 1919 before working as a civilian with the United States Army Air Corps with Verville, who convinced him to work at Buhl. As a Frenchman, he was familiar with the advantages of the sesquiplane concept as it was a popular configuration in France, such as with the Breguet 26T airliner, but rare in the US. The fuselage framework, lower wing and empennage were welded chromium-molybdenum alloy steel tubes faired with wooden battens, with the lower wing integral with the fuselage structure. The upper wings were built around spruce spars, with built up ribs made from spruce and plywood. The entire airframe was covered with doped aircraft-grade fabric. To reduce control forces, projecting aerodynamic balance horns on rudder and elevators, while inset aerodynamic horns were used on the ailerons, which were fitted to the upper wing only. To provide trim control, the rudder was ground adjustable while the elevators could be adjustable in flight. Depending on the models, three different designs of lower wings were used - either constant chord with reversed N struts on the CA-5, a triangular wing with a vee strut on the CA-3, CA-6 and CA-8, or a constant chord wing with two rigged struts, on Canadian built CA-6Ms. All were conventional sesquiplanes with fully enclosed cockpits, fitted with dual controls in front of a passenger cabin. The number in the designation generally referred to the number of occupants as originally designed, with a larger number of seats corresponding to a larger airframe. The first variant built was the CA-5, while later variants had a much slimmer fuselage, a greatly improved windscreen design and a modified cockpit. The CA-5 had the undercarriage legs connected to the fuselage, and part way out from the fuselage, on the lower wing. The CA-3 had the undercarriage mounted solely to the fuselage, while the CA-6 and CA-8 had additional bracing struts from the top of the fuselage to the lower wing which allowed the undercarriage track to be widened. Buhl asserted that its undercarriage design reduced camber changes during landing, and the tendency to yaw due to bumpy ground. The CA-6 was certified to use Edo J-5300 floats. Canadian production. After Buhl had ceased operations in 1932 due to declining sales as the Great Depression deepened, the drawings and jigs were purchased by the Ontario Provincial Air Service (OPAS) in Canada who then built four CA-6M's for use as fire spotting aircraft at their facility in Sault Ste. Marie between 1935 and 1937. These differed from the original aircraft in having Canadian Vickers floats, a new fin and rudder and larger lower wings. Due to the excessive weight of the Canadian-Vickers built floats, the first Ontario Provincial Air Service-built CA-6M refused to leave the water until given a more powerful 440 hp (330 kW) Pratt & Whitney Wasp engine. For details of opertational history and 20 variants, click here.

The Vickers Warwick was a British twin-engined bomber aircraft developed and operated during the Second World War that was primarily used in other roles. In line with the naming convention followed by other RAF heavy bombers of the era, it was named after a British city or town, in this case Warwick. The Warwick was the largest British twin-engined aircraft to see use during the Second World War. The Warwick was designed and manufactured by Vickers-Armstrongs during the late 1930s. It was intended to serve as a larger counterpart to the Vickers Wellington bomber. The two aircraft share similar construction and design principles but development of the Warwick was delayed by a lack of suitable engines. Its first flight was on 13 August 1939 but delays to its intended powerplant and by the time adequate engines were available, it was obsolete. The Warwick entered production during 1942 and squadron service with the Royal Air Force (RAF). Barely a dozen aircraft were built as bombers. The type was used by RAF Transport Command as a transport, and by RAF Coastal Command as an air-sea rescue and maritime reconnaissance aircraft. The Warwick was also operated by the Polish Air Forces in exile in Great Britain and the South African Air Force. A civil operator, the British Overseas Airways Corporation (BOAC), also operated a handful of transport Warwicks. In October 1932, the British industrial conglomerate Vickers-Armstrongs tendered for the Air Ministry Specification B.9/32, which called for the development of a twin-engined medium bomber. During late 1934, when the company was already developing their Type 271 to meet Specification B.9/32, Vickers received a draft requirement for a larger bomber. The draft specification developed into Air Ministry Specification B.1/35, which sought a twin-engined heavy strategic bomber. It was intended to make use of more powerful engines, of 1,000 hp (750 kW), that were being developed, to enable the bomber to be faster and carry a heavier bomb load than the earlier B.3/34. Among the requirements of Specification B.1/35 was a speed of no less than 195 mph (314 km/h) while flying at 15,000 ft (4,600 m), a range of 1,500 mi (2,400 km) while carrying 2,000 lb (910 kg) of bombs, and the engines were to be furnished with variable-pitch propellers. It was designed in parallel with the smaller Wellington, both aircraft having been derived from the Vickers Type 271 design, developed for Specification B.9/32. By the end of July 1935, the Air Ministry was considering eight designs. These included Vicker's proposal, the Type 284, powered by a pair of Bristol Hercules engines, which exceeded the specifications. Vickers received an order for a prototype on 7 October 1935, while the Air Ministry also ordered prototypes from Armstrong Whitworth (the AW.39, a development of the Armstrong Whitworth Whitley) and Handley Page (the HP.55). These alternative designs were cancelled before being built, as Handley Page and Armstrong Whitworth switched to work on newer specifications released for medium (P.13/36) and heavy (B.12/36) bombers. For more details of development and design, operational history and 12 variants, click here. Total number built was 846.

The Fleetwings Sea Bird (or Seabird) was an American-built amphibious aircraft of the 1930s. The Sea Bird was an amphibious utility aircraft designed under contract in 1934–1935 by James C. Reddig for Fleetwings, Inc., of Bristol, Pennsylvania. While the aircraft's basic configuration had a precedent in the design of the Loening "Monoduck" developed by the Grover Loening Aircraft Company as a personal aircraft for Mr. Loening (for whom Reddig worked from 1925 to 1933), the Sea Bird was unusual because of its construction from spot-welded stainless steel. It was a high-wing, wire-braced monoplane with its engine housed in a nacelle mounted above the wings on struts. The pilot and passengers sat in a fully enclosed cabin. Fleetwings initially planned to manufacture 50 production units, but at a price approaching $25,000 during the Depression, there proved to be no sustainable market. The Sea Bird found use with private pilot owners and saw service with the oil support industry in Louisiana, including operation by J. Ray McDermott & Co. Variants F-4 Sea Bird - 4-seat prototype (1 built) F-5 Sea Bird - 5-seat production aircraft (5 built)

The Anderson Greenwood AND-51-A (AG-14) is a two-seat utility aircraft developed in the United States shortly after World War II. It is an all-metal, shoulder-wing monoplane of pod-and-boom configuration, equipped with a pusher propeller, side-by-side seating and fixed tricycle undercarriage. Anderson Greenwood's sole aircraft design was actually a collaborative effort of three engineers: Ben Anderson, Marvin Greenwood & Lomis Slaughter Jr. The name of the last member of the design team was not included in the product name as it was thought it would not boost sales. The prototype first flew in October 1947, but plans to mass-produce the aircraft were interrupted by the Korean War. Eventually, only five more examples were built before Anderson Greenwood abandoned the project in favor of producing aircraft components for other manufacturers. There are still 3 active aircraft on the American register. The aircraft's design placed the wing behind the cabin and allowed easy entry via automobile-like doors on each side of the cabin. The propeller is well protected and provides safety on the ground in comparison to tractor configuration aircraft. The airfoil employed is a NACA 4418 giving high lift and a stable stall characteristics. The flaps are two-position and mechanically operated by a flap handle on the cabin floor between the seats. The engine starter is foot-actuated and the nose-wheel steering is connected to the control wheel. A unique feature of the aircraft is that the rudder is only on the left fin. The photo below shows the right fin as a fixed unit. The aircraft was certified on 20 September 1950 in the normal category. The certification includes a prohibition on aerobatics and spins. One reviewer termed it as “positively spin resistant.”

The Bell 505 Jet Ranger X (JRX) is an American/Canadian light helicopter developed by Bell Helicopter and produced by Bell Textron Canada. The Bell 505 was unveiled at the 2013 Paris Airshow in June 2013 as the Bell SLS (Short Light Single). The Bell 505 designation was officially announced in February 2014. Its first flight occurred on November 11, 2014. The helicopter was certified by Transport Canada in December 2016. The helicopter was unveiled at the 2013 Paris Airshow on June 17, 2013 as the Bell SLS (Short Light Single). The model designation was later announced at HAI Heli-Expo 2014 in Anaheim, California on February 25, 2014. The Bell 505 is a "clean sheet" design, but uses some dynamic components, such as the rotor system, of the Bell 206L-4. The airframe is constructed of metal and composites, and has a 22-square-foot (2.04 m²) flat floor and an 18-cubic-foot (0.51 m³) luggage bay. The Safran Arrius 2R is the type's engine with a dual-channel FADEC and a 3,000-hour Time-between-overhaul. The 505 cockpit is equipped with the Garmin G1000H glass avionics suite. Various options such as a cargo hook are available. The 505 was certified by the Federal Aviation Administration in June 2017 and received high altitude certification (22,500 feet density altitude) in June 2019. Bell delivered the 100th 505 Jet Ranger X in June 2018, and the 200th in August 2019.