The Aermacchi AM.3 was the result of a joint venture between Aermacchi and Aeritalia (then Aerfer Industrie Aerospaziali Meridionali) in response to an Italian Army requirement for an aircraft to replace the Cessna L-19, and was initially designated the MB-335.

The AM.3 used the wing design of the Aermacchi AL-60 utility aircraft, strengthened to incorporate two hardpoints. The fuselage was a new design.

The first prototype, constructed by Aermacchi, flew on 12 May 1967, and it was displayed at the Paris air show in June that year. The second prototype, constructed by AERFER, flew on 22 August 1968, but the aircraft lost the Italian Army contract to the SIAI Marchetti SM.1019. Nevertheless, Aeritalia continued development.

The third prototype used a more powerful Piaggio-built Lycoming GSO-480-B1B6 in place of the original Continental GTSIO-520-C, and this variant was designated AM.3C

Pilot and observer are accommodated in tandem positions, and the craft features dual controls. Aft space is utilitarian, providing space for two stretchers or seat space for additional passengers. Additional configurations include freight transport.

Armament configurations are diverse, as well. Two standard underwing pylons were able to carry 170 kg (375 lb) of stores each. Typical armament includes machine guns, rockets, bombs and missiles. Reconnaissance packs could be fitted to, or inside of, the fuselage. Additional pylons were often added by customers.

In September 1970, the South African Air Force ordered 40 AM.3Cs, designating the aircraft the AM.3CM Bosbok (Bush-buck). The first aircraft was taken on charge in March 1973, with deliveries continuing until December 1975, equipping 41 Squadron and 42 Squadron.

The Bosbok saw extensive action during the South African military operations in Angola between 1975 and 1989, during which it wore an olive-drab/dark earth camouflage instead of the light-grey paint scheme in which it was delivered.

The SAAF's Bosboks had four underwing hardpoints from which a variety of ordnance could be hung, including machine-gun pods, light bombs, and smoke-rocket pods. Each of the two inner hardpoints was stressed for a 170 kg (375 lb) load, with the two outer points being stressed for a 91 kg (200 lb) load.

Roles performed by the Bosbok in SAAF service include:

• Forward air control
• Radio relay (referred to as "Telstar duty" by the SAAF)
• Target marking (using smoke-rockets)
• Reconnaissance/observation (including artillery spotting)
• Casevac
• Liaison

The Bosbok really excelled in the dangerous role of target-marking, in which it used this technique - the aircraft would approach the target at tree-top height, pull up to around 92 m (300 ft) when nearly overhead the target, line up the nose on the target, and release the rockets, before quickly turning away and diving back to tree-top level to avoid ground fire.

Using this method, a Bosbok was once credited with destroying an entire 37 mm anti-aircraft gun position with a lucky direct hit from one of its smoke marker rockets.

Following the end of South Africa's involvement in the Angolan War in 1989 and the subsequent downsizing of the SAAF, the Bosbok was retired from service in 1992.

It was originally manufactured by Valmet of Finland as the L-90 TP Redigo, a development of their earlier training aircraft for the Finnish Air Force. The L-90 was the last military aircraft designed and produced in Finland.

The aircraft is of conventional configuration, with retractable tricycle gear and a low wing. The student and instructor sit side-by-side. As is typical with many military trainers, it can also carry light armament for weapons training, or potentially, for use in a close-support role. The Finnish Air Force only used the L-90 as a liaison aircraft.

The Aermacchi or Macchi MB-326 is a light military jet trainer designed and produced by the Italian aircraft manufacter Aermacchi. It is one of the most commercially successful aircraft of its type, being bought by more than 10 countries and produced under licence in Australia, Brazil and South Africa.

The MB-326 was developed during a period in which "all-through" jet training was considered by many air forces to be the most cost-effective model for training of military pilots. Accordingly, Aermacchi designed it as a single type of aircraft that could readily be perform both elementary and advanced training right through to a near combat-ready standard. Proposed during the 1950s, the Italian Air Force (AMI) quickly became interested in the MB-326, and an initial contract to produce three prototypes was issued following a competition. Several design refinements were made prior to the AMI giving its official approval of the project during 1956. On 10 December 1957, the first prototype performed its maiden flight. On 15 December 1958, the Italian government issued Aermacchi was an order for 15 pre-series aircraft; further orders soon followed.

During February 1962, the MB-326 formally entered service with the AMI. Operational experience with the type demonstrated that the simplicity and economy of scale of operating just one type for all training purposes was usually outweighed by the purchase and operating costs of a large all-jet training fleet. Many operators soon switched to operating the MB-326 in conjunction with a cheaper piston-engined type for basic training purposes. Over time, the MB-326 found its primary role as a lead-in trainer to prepare pilots for transition to very high performance fighter aircraft. It set many category records, including an altitude record of 56,807 ft (17,315 m) on 18 March 1966. While the majority of operators were military, some civil organisations also flew the type; Italy's national flag carrier Alitalia conducted pilot training using a handful of MB-326s.

The Aermacchi MB-326 was a low-wing monoplane with an all-metal structure composed of light alloys. It was one of the first jet trainers to be developed with the aim of catering to both for ab initio and advanced instruction. As originally developed, the MB-326 functioned as a refined but simple aircraft capable of covering the considerably wide range of performance characteristics required to cover both ab initio training and advanced instruction alike; other major characteristics of the type included the capacity to deliver a high rate of utilization in conjunction with minimised servicing and maintenance requirements. According to Flight International, the type was suitable for the teaching of the majority of advanced flying techniques. In addition to being relatively easy to fly, a high degree of safety was also intentionally built into it, including adoption of new Martin-Baker-built ejection seats.

The MB-326 was powered by a single Rolls-Royce Viper non-afterburning turbojet engine, initial production aircraft were powered by the Viper 11 model, capable of generating up to 2,500 lb of thrust. The engine possessed multiple favourable attributes, including its general simplicity and robustness, relatively low revolutions per minute (RPM) and turbine entry temperature (TET), rapid acceleration, ease of installation, and its somewhat forgiving nature to mishandling in the air by students. Air was provided to the engine via a pair of low-profile intakes set into the wing roots. The Viper was produced under licence by Italian aviation company Piaggio following an agreement established with its original manufacturer, the British engine firm Bristol Siddeley, during 1959.

Australia

The Royal Australian Air Force (RAAF) used the MB-326H as a jet trainer. A total of 97 were ordered: 12 were delivered by Macchi, 18 assembled from kits in Australia, and another 67 were built by the Commonwealth Aircraft Corporation and Hawker Aircraft with the designation CA-30. They were essentially similar to the MB-326G but with improved avionics. The RAAF's aerobatic team, The Roulettes, flew the MB-326H from December 1970 until 1989. RAAF pilot training until 1975 consisted of 60 hours pre-selection on CAC Winjeels (from 1975 onwards the PAC CT/4 Airtrainer, aka Plastic Parrot), 150 hours medium and another 75 hours advanced training on MB-326H, before finally progressing to the Mirage IIIOD.

Although widely liked for its excellent handling and well-suited to its task, the service career of the MB-326 was cut short because of structural fatigue problems. The Australian fleet, for example, had a life of type extension program in the 1980s and were then re-winged in the early 1990s after a fatigue-related crash. Even so, the MB-326 was supplemented by new Pilatus PC-9 trainers to reduce flying hours, and the last examples had been withdrawn by 2001 when they were replaced by the Hawk 127.

For more details of development, design and operational history, and the many variants, click here.

The Aero L-29 Delfín (English: Dolphin, NATO reporting name: Maya) is a military jet trainer developed and manufactured by Czechoslovakian aviation manufacturer Aero Vodochody. It is the country's first locally designed and constructed jet aircraft, as well as likely being the biggest aircraft industrial programme to take place in any of the Council for Mutual Economic Assistance (COMECON) countries except the Soviet Union.

In response to a sizable requirement for a common jet-propelled trainer to be adopted across the diverse nations of the Eastern Bloc, Aero decided to embark upon their own design project with a view to suitably satisfying this demand. On 5 April 1959, an initial prototype, designated as the XL-29, performed its maiden flight. The L-29 was selected to become the standard trainer for the air forces of Warsaw Pact nations, for which it was delivered from the 1960s onwards. During the early 1970s, the type was succeeded in the principal trainer role by another Aero-built aircraft, the L-39 Albatros, heavily contributing to a decline in demand for the earlier L-29 and the end of its production during 1974.

During the course of the programme, in excess of 3,000 L-29 Delfin trainers were produced. Of these, around 2,000 were reported to have been delivered to the Soviet Union, where it was used as the standard trainer for the Soviet Air Force. Of the others, which included both armed and unarmed models, many aircraft were delivered to the various COMECON countries while others were exported to various overseas nations, including Egypt, Syria, Indonesia, Nigeria and Uganda. Reportedly, the L-29 has been used in active combat during several instances, perhaps the most high-profile being the use of Nigerian aircraft during the Nigerian Civil War of the late 1960s and of Egyptian L-29s against Israeli tanks during the brief Yom Kippur War of 1973.

The Aero L-29 Delfín was a jet-powered trainer aircraft, known for its straightforward and simplistic design and construction. In terms of its basic configuration, it used a mid-wing matched with a T-tail arrangement; the wings were unswept and accommodated air intakes for the engines within the wing roots. The undercarriage was reinforced and capable of withstanding considerable stresses. According to Fredriksen, the L-29 was relatively underpowered, yet exhibited several favourable characteristics in its flight performance, such as its ease of handling. The primary flying controls are manually operated; both the flaps and airbrakes were actuated via hydraulic systems.

For more details of the development, design and oprational history of the L-29, click here.

It was designed during the 1960s as a replacement for the Aero L-29 Delfín as a principal training aircraft. It was the first trainer aircraft to be equipped with a turbofan powerplant. The type was exported to a wide range of countries as a military trainer.

The L-39 Albatros later served as the basis for the updated L-59 Super Albatros, as well as the L-139 (prototype L-39 with Garrett TFE731 engine). A further development of the design, designated as the L-159 ALCA, entered production in 1997. To date, more than 2,800 L-39s have served with over 30 air forces around the world. The Albatros is the most widely used jet trainer in the world; in addition to performing basic and advanced pilot training, it has also flown combat missions in a light-attack role. The design never received a NATO reporting name.

At the Farnborough Airshow in July 2014, Aero Vodochody announced the launch of the L-39NG, an upgraded and modernised version of the L-39.

For details of design, development, operational history and variants, click here.

The Aichi E13A (Allied reporting name: "Jake") was a long-range reconnaissance seaplane used by the Imperial Japanese Navy (IJN) from 1941 to 1945. Numerically the most important floatplane of the IJN, it could carry a crew of three and a bombload of 250 kg (550 lb). The Navy designation was "Navy Type Zero Reconnaissance Seaplane".

In China, it operated from seaplane tenders and cruisers. Later, it was used as a scout for the Attack on Pearl Harbor, and was encountered in combat by the United States Navy during the Battles of Coral Sea and Midway. It was in service throughout the conflict, for coastal patrols, strikes against navigation, liaison, officer transports, castaway rescues, and other missions, along with some kamikaze missions in the last days of war. It also served on the super battleships Yamato and Musashi as catapult launched reconnaissance aircraft.

One Aichi E13A was operated by Nazi Germany alongside two Arado Ar 196s out of the base at Penang. The three aircraft formed the East Asia Naval Special Service to assist the German Monsun Gruppe as well as local Japanese naval operations.

Eight examples were operated by the French Navy Air Force during the First Indochina War from 1945 until 1947 while others were believed to be operated by the Naval Air Arm of the Royal Thai Navy before the war. One example (MSN 4326) was surrendered to New Zealand forces after the end of hostilities and was flown briefly by RNZAF personnel, but was not repaired after a float was damaged and subsequently sank at its moorings in Jacquinot Bay.

Variants

E13A1
Prototypes and first production model, later designated Model 11.[4]

E13A1-K
Trainer version with dual controls

E13A1a
Redesigned floats, improved radio equipment

E13A1a-S
Night-flying conversion

E13A1b
As E13A1a, with Air-Surface radar

E13A1b-S
Night-flying conversion of above

E13A1c
Anti-surface vessel version equipped with two downward-firing belly-mounted 20 mm Type 99 Mark II cannons in addition to bombs or depth charges.

The Airspeed AS.51 Horsa was a British troop-carrying glider used during the Second World War. It was developed and manufactured by Airspeed Limited, alongside various subcontractors; the type was named after Horsa, the legendary 5th-century conqueror of southern Britain.

Having been greatly impressed by the effective use of airborne operations by Germany during the early stages of the Second World War, such as during the Battle of France, the Allied powers sought to establish capable counterpart forces of their own. The British War Office, determining that the role of gliders would be an essential component of such airborne forces, proceeded to examine available options. An evaluation of the General Aircraft Hotspur found it to lack the necessary size, thus Specification X.26/40 was issued. It was from this specification that Airspeed Limited designed the Horsa, a large glider capable of accommodating up to 30 fully equipped troops, which was designated as the AS 51.

The Horsa was used in large numbers (3,799) by the British Army Air Corps and the Royal Air Force (RAF); both services used it to conduct various air assault operations through the conflict. The type was used to perform an unsuccessful attack on the German Heavy Water Plant at Rjukan in Norway, known as Operation Freshman, and during the invasion of Sicily, known as Operation Husky. Large numbers of Horsa were subsequently used during the opening stages of the Battle of Normandy, being used in the British Operation Tonga and American operations. It was also deployed in quantity during Operation Dragoon, Operation Market Garden, and Operation Varsity. Further use of the Horsa was made by various other armed forces, including the United States Army Air Forces.

For details of development, design, production, operational history and variants, click here.

The Airspeed AS.10 Oxford is a twin-engine monoplane aircraft developed and manufactured by Airspeed. It saw widespread use for training British Commonwealth aircrews in navigation, radio-operating, bombing and gunnery roles throughout the Second World War.

The Oxford was developed by Airspeed during the 1930s in response to a requirement for a capable trainer aircraft that conformed with Specification T.23/36, which had been issued by the British Air Ministry. Its basic design is derived from the company's earlier AS.6 Envoy, a commercial passenger aircraft. After its maiden flight by Percy Colman on 19 June 1937, it was quickly put into production as part of a rapid expansion of the Royal Air Force (RAF) in anticipation of a large-scale conflict.

As a consequence of the outbreak of war, many thousands of Oxfords were ordered by Britain and its allies, including Australia, Canada, France, New Zealand, Poland, and the United States. Following the end of the conflict, the Oxford continued to achieve export sales for some time, equipping the newly formed air forces of Egypt, India, Israel, and Yugoslavia. It was considered to be a capable trainer aircraft throughout the conflict, as well as being used as a general-purpose type. A number of Oxfords are preserved today on static display worldwide.

The Oxford was a low-wing twin-engine cantilever monoplane, featuring a semi-monocoque constructed fuselage, a conventional landing gear configuration and a wooden tail unit. It was capable of reproducing the flight characteristics of many contemporary front-line aircraft then in military service. It was specifically developed to be suitable for a range of training missions, including navigation, flying instruction, night flying, instrument flying, wireless, direction-finding, gunnery, and vertical photography. The Oxford was specifically planned and developed to incorporate various modern innovations and equipment fittings, including a full array of instruments and controls within the cockpit, which assisted in its principal trainer role. In addition, the Oxford could also be used in various secondary roles, such as an air ambulance and maritime patrol aircraft.

From November 1940, the Royal Australian Air Force received 391 Oxford I and IIs from RAF contracts for use in Australia. Most of the survivors were sold in the early 1950s. A total of 8,852 Oxfords were produced.

For more details of development, design, opertional history, operators and variants, click here.

The Amiot 143 (sometimes written as 143M or 143 M.5) was a 1930s French 5-seat Multiplace de Combat (M.5) designed to meet 1928 specifications for a monoplane capable of day and night bombing, long-range reconnaissance and bomber escort.

Amiot received an order for two prototype Amiot 140s, to be evaluated against the competing Bleriot 137, Breguet 410 and SPCA 30. The Amiot 140 was a high-winged cantilever monoplane of all-metal construction, with a fixed tail wheel undercarriage. The pilot sat in an open cockpit, with positions for gunners in the nose and dorsal positions. A glazed gondola under the forward fuselage carried a bombardier/gunner, ensuring that the gunners had a clear field of fire all around the aircraft. The Amiot was intended to be powered by two 515 kW (691 hp) Lorraine 18G Orion water-cooled W engines but these were unavailable and the first prototype was fitted with Hispano-Suiza 12Nbr engines to allow flight testing, making its maiden flight on 12 April 1931. The second prototype was completed in February 1932 but the continued non-availability of its intended engines, either the original Lorraine-Dietrichs or turbocharged Hispano-Suizas, meant that it never flew. Despite this, on 23 November 1933 an order was placed for 40 Amiot 140s, to be powered by 662 kW (888 hp) Lorraine 12Q Eider engines.

The French Air Ministry had meanwhile revised its requirements, concentrating on the bombing role and asking for better performance. Amiot redesigned the aircraft to meet these requirements and incorporate lessons learned during testing of the Amiot 140. The gondola under the fuselage was enlarged, allowing easier operation of the aircraft's guns and a radio-operator was added, bringing the crew to five. Manually operated gun turrets were provided in the nose and dorsal positions. Orders were placed for two prototypes, differing only in the engines fitted, with the Amiot 142 having Hispano-Suiza 12Y engines and the Amiot 143 having Gnome-Rhone 14K radial engines. The 143 flew first, on 1 August 1934, while the 142 didn't fly until January 1935. As it was decided to allocate the Hispano-Suiza engines to fighters, the Amiot 143 was selected, and the existing order for 40 Amiot 140s was converted to 143s.

The Amiot 143 had the same high-wing and fixed undercarriage as the Amiot 140, with the wing thick enough to allow crew access to the engines by a tunnel between the wing spars. The pilot sat in an enclosed cockpit, level with the leading edge of the wing and the navigator-bombardier, who was also provided with flying controls, sat in the extensively glazed gondola beneath the pilot. The radio operator sat towards the rear of the gondola and in early aircraft operated two 7.7 mm (0.303 in) Lewis guns. Nose and dorsal turrets, each carrying a Lewis gun, completed the defensive armament, while the gondola also housed an internal bomb-bay. After 40 aircraft had been completed, the design was revised, with the aircraft being fitted with a longer nose (increasing overall length from 17.94 to 18.24 m (58.9 to 59.8 ft), a revised fuel system and with the Lewis guns in the nose, dorsal turrets and ventral position each being replaced by single 7.5 mm (0.295 in) MAC 1934 machine guns, with a fourth gun for the navigator-bombardier firing through a hatch in the floor.

Deliveries of the design began in April 1935 and continued until March 1937, with a total of 138 being built. An improved version, the Amiot 144 was built to meet 1933 requirement for a Multiplace de Combat, fitted with a retractable undercarriage. First flying on 18 January 1936, only one was built.

For details of operational history and variants, click here.

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 Arado Ar 196 was a shipboard reconnaissance low-wing monoplane aircraft built by the German firm of Arado starting in 1936. The next year it was selected as the winner of a design contest and became the standard aircraft of the Kriegsmarine (German Navy) throughout World War II.

In October 1936, the RLM asked for a He 114 replacement. The only stipulations were that it would use the BMW 132, and requested prototypes in both twin-float and single-float configurations. Designs were received from Dornier, Gotha, Arado and Focke-Wulf. Heinkel declined to tender, contending that the He 114 could still be made to work.

With the exception of the Arado low-wing monoplane design, all were conventional biplanes. This gave the Arado better performance than any of the others, and the RLM ordered four prototypes. The RLM was conservative by nature, so they also ordered two of the Focke-Wulf Fw 62 designs as a backup. It quickly became clear that the Arado would work effectively, and only four prototypes of the Fw 62 were built.

The Ar 196 prototypes were all delivered in summer 1937, V1 (which flew in May) and V2 with twin floats as A models, and V3 and V4 on a single float as B models. Both versions demonstrated excellent water handling and there seemed to be little to decide, one over the other. Since there was a possibility of the smaller outrigger floats on the B models "digging in", the twin-float A model was ordered into production. A single additional prototype, V5, was produced in November 1938 to test final changes.

Ten A-0s were delivered in November and December 1938, with a single 7.92 mm (.312 in) MG 15 machine gun at the rear seat for defence. Five similarly equipped B-0s were also delivered to land-based squadrons. This was followed by 20 A-1 production models starting in June 1939, enough to equip the surface fleet.

For more information including operational history, click here.

The Arado Ar 232 Tausendfüßler (German: "Millipede"), sometimes also called Tatzelwurm, was a cargo aircraft, designed and built in small numbers by the German firm Arado Flugzeugwerke during World War II. The design introduced, or brought together, almost all of the features now considered to be standard in modern cargo transport aircraft designs, including a box-like fuselage slung beneath a high wing; a rear loading ramp (that had first appeared on the December 1939-flown Junkers Ju 90 V5 fifth prototype four-engined transport via its Trapoklappe); a high-mounted twin tail for easy access to the hold; and various features for operating from rough fields. Although the Luftwaffe was interested in replacing or supplementing its fleet of outdated Junkers Ju 52/3m transports, it had an abundance of types in production at the time, and did not purchase large numbers of the Ar 232.

The first two prototypes, bearing the Stammkennzeichen alphabetic codes GH+GN and VD+YA respectively, started trials in early 1941. The first flight resulted in the collapse of the nose gear, but the twenty-two "millipede wheels" saved the aircraft from damage. A further ten pre-production machines were built, and were used operationally as the Ar 232A-0 while awaiting production versions. In general, the Ar 232 completely outperformed the Ju 52/3m. It carried roughly double the load over longer distances, operated from shorter runways and rougher fields if need be, and cruised about 70 km/h (44 mph) faster.

Two four-engined prototypes were ordered, the V3 and V4, and V3 first flew in May 1942. A further 10 were then ordered as the Ar 232B-0, and were used widely in an operational role. However, this was the only order for the design, as the Luftwaffe gave transport aircraft production a very low priority. Many of those produced were used by Arado to transport aircraft parts between its factories, and did not see front-line service.

Wilhelm van Nes led the design of the Ar 232. He began at the cargo area, with a bay directly behind the "stepless cockpit" that was 6.6 m (21 ft 7¾ in) long, 2.3 m (7 ft 6½ in) wide and 2.0 m (6 ft 6¾ in) high. Typical designs of the era used a side-mounted door for access, but the Ar 232 used hydraulically powered clamshell-doors on the rear of the bay with a ramp to allow cargo to be rolled into the hold. The twin tail configuration tail surfaces were mounted on the end of a long boom to keep the area behind the doors clear so trucks could drive right up to the ramp, much like the 1944-era American Fairchild C-82 Packet of a differing twin boom fuselage configuration. The high-set tail on its "pod-and-boom" configuration fuselage allowed the Ar 232 to be loaded and unloaded faster than other designs.

For short-field performance, the Ar 232 incorporated Arado's own "travelling flap" design for the entire rear surface of the wing. Even loaded to 16,000 kg (35,270 lb), it could take-off in 200 m (656 ft). This distance could be further reduced by using Starthilfe liquid fuelled monopropellant rocket assist (RATO) jettisonable propulsion units for take-off.

Normally operated by a crew of four, the pilot was the only member without two roles. The navigator operated a 13 mm (.51 in) MG 131 machine gun in the nose, the radio operator a 20 mm MG 151 cannon in a rotating turret on the roof, and the loadmaster a 13 mm (.51 in) MG 131 machine gun firing rearward from the extreme rear of the cargo bay above the cargo doors.

Landing gear design innovations
The most noticeable feature of the Ar 232 was the landing gear. Normal operations from prepared runways used a tricycle gear — a then-novel feature for German military aircraft—but the sideways-retracting main gear's lever-action lower oleo-strut suspended arm – carrying the main gear's wheel/tire unit at the bottoms of the maingears' struts could "break", or kneel, after landing to place the fuselage closer to the ground and thereby reduce the ramp angle. An additional set of eleven smaller, non-retractable twinned wheels per side, mounted along the ventral centreline of the fuselage from just behind the semi-retractable nosewheel aftwards to just forward of the wing's trailing edge, supported the aircraft once the main landing gear's lever-action lower arm had "knelt", or could be used for additional support when landing on soft or rough airfields. The aircraft was intended to be capable of taxiing at low speeds on its row of small wheels, thus being able to negotiate small obstacles such as ditches up to 1.5 m (5 ft) in width. The appearance of the row of small wheels led to the nickname "millipede". In flight, the main legs fully retracted inwards into the wings, while the fixed support wheels remained exposed and the nose wheel only semi-retracted, with the nosewheel tire's lowest point while retracted never going above the lowest point of the 22 auxiliary centre-line wheels' tires.

The Arado Ar 234 Blitz (English: lightning) was the world's first operational jet-powered bomber, built by the German Arado company in the closing stages of World War II.

Produced in limited numbers it was used almost entirely in the reconnaissance role. In its few uses as a bomber it proved to be nearly impossible to intercept. It was the last Luftwaffe aircraft to fly over the UK during the war, in April 1945.

In late 1940, the Reich Air Ministry (German: Reichsluftfahrtministerium, abbreviated RLM) offered a tender for a jet-powered high-speed reconnaissance aircraft with a range of 2,156 km (1,340 mi). Arado was the only company to respond, offering their E.370 project, led by Professor Walter Blume. This was a high-wing conventional-looking design with a Junkers Jumo 004 engine under each wing.

Arado estimated a maximum speed of 780 km/h (480 mph) at 6,000 m (20,000 ft), an operating altitude of 11,000 m (36,000 ft) and a range of 1,995 km (1,240 mi). The range was short of the RLM request, but they liked the design and ordered two prototypes as the Ar 234. These were largely complete before the end of 1941, but the Jumo 004 engines were not ready, and would not be ready until February 1943.[ When they did arrive they were considered unreliable by Junkers for in-flight use and were cleared for static and taxi tests only. Flight-qualified engines were finally delivered, and the Ar 234 V1 made its first flight on 30 July 1943 at Rheine Airfield (presently Rheine-Bentlage Air Base).

By September, four prototypes were flying. The second prototype, Arado Ar 234 V2, crashed on 2 October 1943 at Rheine near Münster after suffering a fire in its port wing, failure of both engines and various instrumentation failures. The aircraft dived into the ground from 1,200 m (3,900 ft), killing pilot Flugkapitän Selle. The eight prototype aircraft were fitted with the original arrangement of trolley-and-skid landing gear, intended for the planned operational, but never-produced Ar 234A version.

The sixth and eighth of the series were powered with four BMW 003 jet engines instead of two Jumo 004s, the sixth having four engines housed in individual nacelles, and the eighth flown with two pairs of BMW 003s installed within "twinned" nacelles underneath each wing. These were the first four-engine jet aircraft to fly. The twin-Jumo 004 powered Ar 234 V7 prototype made history on 2 August 1944 as the first jet aircraft ever to fly a reconnaissance mission, flown by Erich Sommer.

The projected weight for the aircraft was approximately 8 tonnes (7.9 long tons; 8.8 short tons). To reduce the weight of the aircraft and maximize the internal fuel, Arado did not use the typical retractable landing gear. Instead, the aircraft was to take off from a jettisonable three-wheeled, tricycle gear-style trolley[7] known as a Bugradstartwagen (nosewheel takeoff-carriage in English, as-described in an Ar 234A Typenblatt factory drawing for the Ar 234 V8 prototype) and land on three retractable skids, one under the central section of the fuselage, and one under each engine nacelle. This central main skid beneath the fuselage was originally intended to fully retract into thoe fuselage with skid-bay doors enclosing it, and was originally shown in a 1942-dated Arado engineering drawing, under its overall E 370 airframe factory development designation, as intended to be made from a three-sided channel-section component, featuring a set of nine triple-beaded wooden rollers within the channel-section mainskid, for ground contact purposes. However, as with the operational Messerschmitt Me 163B rocket fighter which used a landing skid, it was discovered that such a skid-format landing gear for the Ar 234A design's prototypes did not allow mobility after the end of the landing run, which would have left aircraft scattered widely over an airfield's acreage, unable to taxi off the runway without remounting every aircraft on a trolley for towing off the landing area. Erich Sommer himself once noted for late 20th-century television that the landing skid-equipped prototypes, when touching down on a wet-turf airstrip, had a landing run characteristic that "was like greased lightning" and "like [landing on] soap", from the complete lack of braking capability of the landing skid system.

For more details of other unusual features such as the rear-facing periscope on top of the cockpit, and the various versions of the Ar 234, click here.

Ar 234 C four engined version

The Armstrong Whitworth A.W.41 Albemarle was a twin-engine transport aircraft developed by the British aircraft manufacturer Armstrong Whitworth and primarily produced by A.W. Hawksley Ltd, a subsidiary of the Gloster Aircraft Company. It was one of many aircraft which entered service with the Royal Air Force (RAF) during the Second World War.

The Albemarle had been originally designed as a medium bomber to fulfil Specification B.9/38 for an aircraft that could be built of wood and metal without using any light alloys; however, military planners decided to deemphasise the bomber role in favour of aerial reconnaissance and transport missions, leading to the aircraft being extensively redesigned mid-development. Performing its maiden flight on 20 March 1940, its entry to service was delayed by the redesign effort, thus the first RAF squadron to operate the Albemarle, No. 295 at RAF Harwell, did not receive the type in quantity until January 1943. As superior bombers, such as the Vickers Wellington, were already in use in quantity, all plans for using the Albemarle as a bomber were abandoned.

Instead, the Albemarle was used by RAF squadrons primarily for general and special transport duties, paratroop transport and glider towing, in addition to other secondary duties. Albemarle squadrons participated in Normandy landings and the assault on Arnhem during Operation Market Garden. While the Albemarle remained in service throughout the conflict, the final examples in RAF service were withdrawn less than a year after the war's end. During October 1942, the Soviet Air Force also opted to order 200 aircraft; of these, only a handful of Albemarles were delivered to the Soviets prior to the Soviet government deciding to suspend deliveries in May 1943, and later cancelling the order in favour of procuring the American Douglas C-47 Skytrain instead. A total of 602 Albemarles were built.

For details of development, design aand operational history, click here.

Variants

Over the course of its production life, a number of variants of the Albemarle were built:

ST Mk I – 99 aircraft (Specifications below)
GT Mk I – 69
ST Mk II – 99
Mk III – One prototype only.
Mk IV – One prototype only.
ST Mk V – 49
ST Mk VI – 133
GT Mk VI – 117

The Armstrong Whitworth Siskin was a biplane single-seat fighter aircraft developed and produced by the British aircraft manufacturer Armstrong Whitworth Aircraft. It was also the first all-metal fighter to be operated by the Royal Air Force (RAF), as well as being one of the first new fighters to enter service following the end of the First World War.

The Armstrong Whitworth Siskin was a development of the Siddeley-Deasy S.R.2 Siskin designed by Major F. M. Green (formerly chief engineer of the Royal Aircraft Factory) of the Siddeley-Deasy Motor Car Company. A major impetus for the aircraft's development was the Air Ministry's issuing of RAF Specification Type I, which called for a single-seat fighter that was powered by the ABC Dragonfly radial engine. The Dragonfly would prove to be a disappointment as it failed to meet its anticipated performance.

The SR.2 Siskin was a single-bay biplane of wood and fabric construction. It angular in form, with little attention paid to obvious avenues for drag reduction. Perhaps its most distinctive feature was its fixed conventional landing gear, which had relatively lengthy oleo strut shock absorbers carrying the axle, which was in turn connected by radius rods to a pair of V-struts situated behind the axle. Its wings were of unequal span. It was powered by a single ABC Dragonfly radial engine, which was installed on the nose in a streamlined cowling. To regulate the engine's temperature, each individual cylinder had its own cooling channel. Armament consisted of a pair of Vickers machine guns mounted directly in front of the pilot.

The Siskin made its first flight in May 1919. While the initial aircraft was powered by the intended Dragonfly engine, it would only deliver 270 hp (200 kW) rather than the expected 320 hp(230 kW). Despite early promise, the Dragonfly was disastrous, being less powerful, unreliable, and prone to overheating while excessive vibration resulted in crankshaft failures after only a few hours of use. Despite the engine, the Siskin displayed generally good properties, possessing favourable stability and handling characteristics, along with performance that could outmatch its direct rivals for RAF orders.

In 1919, Siddeley-Deasy merged with Armstrong Whitworth, with the aviation interests becoming Armstrong Whitworth Aircraft. Siddeley-Deasy had inherited the design of the RAF 8 fourteen-cylinder radial engine and its designer Sam D. Heron. By 1920, this engine, as the Jaguar, had been developed sufficiently to replace the Dragonfly. A prototype Siskin fitted with a Jaguar flew on 20 March 1921. Air Ministry officials were impressed but urged Armstrong Whitworth to continue developing the aircraft as only an all-metal design would be acceptable to the Royal Air Force (RAF).

During 1922, Air Ministry Specification 14/22 was issued for an all-metal single-seat high performance landplane. The Siskin was submitted leading to an order for a single Jaguar-powered prototype. Aside from the engine change, Major Green redesigned it with an all-metal structure, as the Siskin III. The all-metal Siskin was the start of the British transition to metal for military aircraft.

For details of operational history and variants, click here. A total of 485 Siskins were built.

These photos clearly show that the Siskin was a prime example of a sesquiplane.

The Armstrong Whitworth A.W.38 Whitley was a British medium bomber aircraft of the 1930s. It was one of three twin-engined, front line medium bomber types that were in service with the Royal Air Force (RAF) at the outbreak of the Second World War. Alongside the Vickers Wellington and the Handley Page Hampden, the Whitley was developed during the mid-1930s according to Air Ministry Specification B.3/34, which it was subsequently selected to meet. In 1937, the Whitley formally entered into RAF squadron service; it was the first of the three medium bombers to be introduced.

Following the outbreak of war in September 1939, the Whitley participated in the first RAF bombing raid upon German territory and remained an integral part of the early British bomber offensive. In 1942 it was superseded as a bomber by the larger four-engined "heavies" such as the Avro Lancaster. Its front-line service included maritime reconnaissance with Coastal Command and the second line roles of glider-tug, trainer and transport aircraft. The type was also procured by British Overseas Airways Corporation as a civilian freighter aircraft. The aircraft was named after Whitley, a suburb of Coventry, home of Whitley plant, belonging to Armstrong Whitworth.

The Armstrong Whitworth Whitley was a twin-engined heavy bomber, initially being powered by a pair of 795 hp (593 kW). Armstrong Siddeley Tiger IX radial engines. More advanced models of the Tiger engine equipped some of the later variants of the Whitley; starting with the Whitley Mk IV variant, the Tigers were replaced by a pair of 1,030 hp (770 kW) Rolls-Royce Merlin IV V12 engines. According to Moyes, the adoption of the Merlin engine gave the Whitley a considerable boost in performance.

The Whitley had a crew of five: a pilot, co-pilot/navigator, a bomb aimer, a wireless operator and a rear gunner. The pilot and second pilot/navigator sat side by side in the cockpit, with the wireless operator further back. The navigator, his seat mounted on rails and able to pivot, slid backwards and rotated to the left to use the chart table behind him after take-off. The bomb aimer position was in the nose with a gun turret located directly above. The fuselage aft of the wireless operator was divided horizontally by the bomb bay; behind the bomb bay was the main entrance and aft of that the rear turret. The bombs were stowed in two bomb bays housed within the fuselage, along with a further 14 smaller cells in the wing. Other sources state there were 16 "cells", two groups of two in the fuselage and four groups of three in the wings, plus two smaller cells for parachute flares in the rear fuselage. Bomb racks capable of holding larger bombs were installed on the Whitley Mk III variant.

The early examples had a nose turret and rear turret, both being manually operated with one Vickers 0.303 machine gun apiece. On the Whitley Mk III this arrangement was substantially revised: a new retractable ventral 'dustbin' position was installed mounting twin .303 in (7.7 mm) Browning machine-guns and the nose turret was also upgraded to a Nash & Thompson power-operated turret. On the Whitley Mk IV, the tail and ventral turrets were replaced with a Nash & Thompson power-operated tail turret mounting four Browning .303 machine guns; upon the adoption of this turret arrangement, the Whitley became the most powerfully armed bomber in the world against attacks from the rear.

The fuselage comprised three sections, with the main frames being riveted with the skin and the intermediate sections being riveted to the inside flanges of the longitudinal stringers. Extensive use of Alclad sheeting was made. Fuel was carried in three tanks, a pair of 182 imp gal (830 L) tanks in the leading edge of each outer wing and one 155 imp gal (700 L) tank in the roof of the fuselage, over the spar center section; two auxiliary fuel tanks could be installed in the front fuselage bomb bay compartment. The inner leading edges contained the oil tanks, which doubled as radiant oil coolers. To ease production, a deliberate effort was made to reduce component count and standardise parts. The fuselage proved to be robust enough to withstand severe damage.

The Whitley featured a large rectangular-shaped wing; its appearance led to the aircraft receiving the nickname "the flying barn door". Like the fuselage, the wings were formed from three sections, being built up around a large box spar with the leading and trailing edges being fixed onto the spar at each rib point. The forward surfaces of the wings were composed of flush-riveted, smooth and unstressed metal sheeting; the rear 2/3rds aft of the box spar to the trailing edge, as well as the ailerons and split flaps was fabric covered. The inner structure of the split flaps was composed of duralumin and ran between the ailerons and the fuselage, being set at a 15–20 degree position for taking off and at a 60 degree position during landing. The tailplanes employed a similar construction to that of the wings, the fins being braced to the fuselage using metal struts; the elevators and rudders incorporated servo-balancing trim tabs.

For details of development, operational history, civilian service and 8 variants, click here.

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 Avro Cadet was a single-engined British biplane trainer designed and built by Avro in the 1930s as a smaller development of the Avro Tutor for civil use.

The Avro 631 Cadet was developed in 1931 as a smaller, more economical, derivative of the Tutor military trainer, for flying club or personal use. The first prototype, G-ABRS flew in October 1931. It was publicly unveiled at the opening of Skegness airfield in May 1932, although by this time, the first orders for the type, for the Irish Army Air Corps, had already been placed and the order (for six Cadets) delivered.

The Avro 631 Cadet was replaced in production in September 1934 by the improved Avro 643 Cadet, which had a revised rear fuselage with a raised rear seat, retaining the 135 hp (101 kW) Armstrong Siddeley Genet Major 1 engine of the Avro 631. In turn, this formed the basis for the more powerful Avro 643 Mk II Cadet; it was also strengthened and had improved parachute egress. This model entered service in 1935, and was built in the largest numbers, including 34 fitted with a tailwheel for the Royal Australian Air Force.

The Cadet, while smaller and more economical than the Tutor, was still more expensive to run than competing two-seat light civil aircraft and was harder to hangar because of its lack of folding wings, so it was used mainly as a trainer for flying schools or the military. By far, the largest civil user was Air Service Training Ltd, which operated 17 Avro 631s at Hamble, together with a further four operated by its Hong Kong subsidiary, the Far East Aviation Co. Air Service Training also operated 23 Mk II Cadets, with both these and the earlier Cadets remaining in service with Reserve Training Schools run by Air Service Training until they were impressed as ATC instructional airframes in 1941.

The other major operator was the RAAF, which acquired 34 Mk II Cadets, delivered between November 1935 and February 1939. These remained in service until 1946, when the surviving 16 were sold for civil use. Two of these were re-engined in 1963 with 220 hp (160 kW) Jacobs R-755 engines for use as crop sprayers. In the UK, only two Cadets survived the war.

VARIANTS

Avro 631 Cadet
Initial version, powered by Armstrong Siddeley Genet Major I engine, 35 built.
Avro 643 Cadet
Raised rear seat, eight built.
Avro 643 Cadet II
Powered by 150 hp (110 kW) Genet Major 1A, 61 built.

The Avro 701 Athena is a British advanced trainer aircraft built by Avro in the late 1940s. It was designed to replace the North American Harvard in the Royal Air Force, but was bought only in small numbers, the competing Boulton Paul Balliol being preferred. 22 (including prototypes) were built.

The Athena was designed to meet the requirements of Air Ministry Specification T.7/45 for a three-seat advanced trainer powered by a turboprop engine for the RAF. The Athena was an all-metal low-winged monoplane, with a side-by-side cockpit. The Air Ministry rethought its requirements in 1947 and replaced the original specification with Specification T.14/47, which specified the use of a Rolls-Royce Merlin 35 piston engine, large stocks of which were held in store.

Despite the change in specification, the first three prototypes were of the turboprop-powered Athena T.1, the first of which, powered by an Armstrong Siddeley Mamba engine, flew on 12 June 1948 at Woodford Aerodrome. The Merlin-powered Athena T.2 first flew on 1 August 1948, and was evaluated against the similar Boulton Paul Balliol.

A small production run of 15 Athenas was ordered for the RAF, but the Balliol was preferred, and no further Athenas were ordered.

The 15 production Athenas were used by the RAF from 1950  for armament training at the RAF Flying College at RAF Manby. A single aircraft was loaned back to Avro and given the civil registration G-ALWA for a demonstration tour of India. No sales resulted and it was returned to the RAF.

Variants

Athena T.Mk.1
Turboprop-powered prototype. One 1,010 hp (750 kW) Armstrong Siddeley ASM.3 Mamba engine. Two built.
Athena T.Mk.1A
Single prototype powered by 1,400 hp (1,000 kW) Rolls-Royce RDa.1 Dart engine. Second prototype to fly.
Athena T.Mk.2
Trainer to Spec. T.14/47 powered by 1,280 hp (950 kW) Rolls-Royce Merlin 35. Four prototypes plus 15 production.

The Avro Canada CF-100 Canuck (affectionately known as the "Clunk") is a Canadian twinjet interceptor/fighter designed and produced by aircraft manufacturer Avro Canada. It has the distinction of being the only Canadian-designed fighter to enter mass production.

Work commenced in October 1946 in response to a Royal Canadian Air Force (RCAF) specification calling for a new jet-powered interceptor/fighter aircraft suitable for long-distance patrol missions and all-weather operations. On 19 January 1950, the CF-100 Mark 1 prototype, 18101, conducted its maiden flight, powered by a pair of Rolls-Royce Avon RA 3 turbojet engines. Both pre-production and production series aircraft were powered by the domestically-developed Avro Orenda engine instead. Flight testing proved the CF-100 to possess a relatively short takeoff run and a high climb rate, making it well suited to its role as an interceptor. On 18 December 1952, Squadron Leader Janusz Żurakowski, the Avro company chief development test pilot, took the CF-100 Mk 4 prototype up to Mach 1.10 in a dive from 14,000 m (45,000 ft), making the type the first straight-winged jet aircraft to achieve controlled supersonic flight.

The CF-100 principally served with the Royal Canadian Air Force and Canadian Armed Forces; it was also procured in small numbers by Belgium to equip the Belgian Air Component. Introduced during 1952 amid the Cold War, the CF-100 was typically deployed at both NATO bases in Europe and in North America as part of North American Aerospace Defense Command (NORAD). In addition to the type's use by frontline squadrons, it was also supplied to operational training units and frequently used for other secondary duties, including aerial reconnaissance and electronic warfare roles. During the early 1950s, the Avro Canada CF-103, an advanced derivative of the CF-100 that adopted a swept wing and was capable of transonic speeds, was in development, but was terminated. Further development of these concepts ultimately led to the Avro Canada CF-105 Arrow.

During 1981, all of the remaining RCAF CF-100s were withdrawn from service, having been succeeded in the electronic warfare role by the CC-117 Falcon. A total of 692 CF-100's were built.

Zor details of the development and design, flight testing. production, operational history and 16 variants, click here.

Both bombers having been developed to the same specification, as well as the Short Stirling, all three aircraft being four-engined heavy bombers adopted by the Royal Air Force (RAF) during the same wartime era.

The Lancaster was designed by Roy Chadwick and powered by four Rolls-Royce Merlins and in one version, Bristol Hercules engines. It first saw service with RAF Bomber Command in 1942 and as the strategic bombing offensive over Europe gathered momentum, it was the main aircraft for the night-time bombing campaigns that followed. As increasing numbers of the type were produced, it became the principal heavy bomber used by the RAF, the RCAF and squadrons from other Commonwealth and European countries serving within the RAF, overshadowing the Halifax and Stirling.

A long, unobstructed bomb bay meant that the Lancaster could take the largest bombs used by the RAF, including the 4,000 lb (1,800 kg), 8,000 lb (3,600 kg) and 12,000 lb (5,400 kg) blockbusters, loads often supplemented with smaller bombs or incendiaries. The "Lanc", as it was known colloquially, became one of the most heavily used of the Second World War night bombers, "delivering 608,612 long tons of bombs in 156,000 sorties". The versatility of the Lancaster was such that it was chosen to equip 617 Squadron and was modified to carry the Upkeep "bouncing bomb" designed by Barnes Wallis for Operation Chastise, the attack on German Ruhr valley dams.

A total of 7377 units were built.

For more details o the development and operational history of the Lancaster, click here.

It was developed by Avro from the Avro Lincoln bomber, which itself had been a development of the famous wartime Avro Lancaster bomber.

The Shackleton was developed during the late 1940s as part of Britain's military response to the rapid expansion of the Soviet Navy, in particular its submarine force. Produced as the primary type equipping RAF Coastal Command, the Type 696, as it was initially designated, incorporated major elements of the Lincoln, as well as the Avro Tudor passenger aircraft, and was furnished with extensive electronics suites in order to perform the anti-submarine warfare (ASW) mission along with a much-improved crew environment to accommodate the long mission times involved in patrol work. Being known for a short time as the Lincoln ASR.3, it was decided that the Type 696 would be named Shackleton in service, after the polar explorer Sir Ernest Shackleton.

The Type 696 was a significant development upon the Lincoln. Elements of the Avro Tudor airliner were also reused in the design; Lincoln and Tudor had been derivatives of the successful wartime Avro Lancaster bomber.Crucially, the new aircraft was to be capable of a 3,000-nautical-mile (3,500 mi; 5,600 km) range while carrying up to 6,000 pounds (2,700 kg) of weapons and equipment. In addition to featuring a large amount of electronic equipment, the Type 696 had a much-improved crew environment over other aircraft types to allow them to be more effective during the lengthy mission times anticipated. During development the Type 696 was provisionally referred to as the Lincoln ASR.3 before the officially allocated name 'Shackleton' was selected. A total of 185 units were built.

For more information on development and operational history,  click here.

Developed from the Avro Lancaster, the first Lincoln variants were initially known as the Lancaster IV and V; these were renamed Lincoln I and II. It was the last piston-engined bomber operated by the Royal Air Force (RAF). The war ended before the Lincoln went into action. Production of the type proceeded and the type was adopted in quantity, allowing it to complement and progressively replace the preceding Lancaster in RAF service during the late 1940s.

The Lincoln was deployed on operations during the 1950s. RAF squadrons equipped with the type were used as part of Britain's action against guerrilla fighters during the Mau Mau Uprising in Kenya; the RAF and the Royal Australian Air Force (RAAF) operated the Lincoln during the Malayan Emergency. The type also saw significant peacetime service with the RAF, RAAF and the Argentine Air Force (Spanish: Fuerza Aérea Argentina). Lincolns were also operated in civil aviation, including use as aerial test beds for aero-engine research.

In RAF service, the Lincoln was replaced by a new generation of bombers harnessing newly developed jet propulsion. Chief amongst these was the English Electric Canberra, which was also adopted by a wide range of operators across the world including the RAAF and Argentine Air Force.

For details of he development, operational history and variants of the Lincoln, click here, and for a more detailed history of its service in the RAAF, click here.

It was a development of the Hunting Jet Provost trainer, itself a jet engined version of the Percival Provost, which originally flew in 1950 with a radial piston engine.

The BAC 167 Strikemaster is essentially an armed version of the Jet Provost T Mk 5; the Strikemaster was modified with an uprated engine, wing hardpoints capable of carrying four 500 pound Mk82 bombs, two machine guns under the intakes, uprated flap system with two jacks, larger airbrake jacks, new communication and navigation gear, different electrical system, canopy breakers on the ejection seats, and a revised fuel system including tip tanks on the wing tips. First flown in 1967, the aircraft was marketed as a light attack or counter-insurgency aircraft, but most large-scale purchasers were air forces wanting an advanced trainer, although Ecuador, Oman and Yemen have used their aircraft in combat. A total of 146 were built.

The Strikemaster was capable of operating from rough air strips, with dual ejection seats suitable even for low-altitude escape, and it was therefore widely used by third-world nations. Operations by the type were restricted by most military users after the Royal New Zealand Air Force found fatigue cracking in the wings of its aircraft. Many aircraft retired by Botswana, New Zealand, Saudi Arabia and Singapore have found their way into museums and private collections.

For more details, click here.

Operational history