The Savoia-Marchetti SM.79 Sparviero (Italian for sparrowhawk) is a three-engined medium bomber developed and manufactured by the Italian aviation company Savoia-Marchetti. It may be the best-known Italian aeroplane of the Second World War. The SM.79 was easily recognizable due to its fuselage's distinctive dorsal "hump", and was reportedly well liked by its crews. It was nicknamed il gobbo maledetto ("damned hunchback"). The SM.79 was developed in the early 1930s. It is a cantilever low-wing monoplane of combined wood and metal construction, designed with the intention of producing a swift eight-passenger transport aircraft capable of outperforming the fastest of its contemporaries, but its potential as a combat aircraft quickly attracted the attention of the Italian government. It made its first flight on 28 September 1934 and early examples of the type established 26 separate world records between 1937 and 1939, qualifying it for some time as the fastest medium bomber in the world.[4] As such, the SM.79 quickly came to be regarded as an item of national prestige in Fascist Italy, attracting significant government support and often being deployed as an element of state propaganda. Early on, the aircraft was routinely entered in competitive fly-offs and air races, seeking to capitalise on its advantages, and often emerged victorious in such contests. The SM.79 first saw combat during the Spanish Civil War. In this theatre it normally operated without fighter escort, relying on its high speed to evade interception. The SM.79's performance during the Spanish deployment was successful and stimulated demand for the type, including a decision to adopt it as the backbone of Italy's bomber units. Both Yugoslavia and Romania opted to procure the type for their own air services, while large numbers were also procured for the Regia Aeronautica. Almost 600 SM.79-I and –II aircraft were in service when Italy entered the Second World War in May 1940; thereafter, they were deployed in every theatre of war in which the Italians fought. The SM.79 was operated in various capacities during the Second World War, initially being used mainly as a transport aircraft and medium bomber. Following pioneering work by the "Special Aerotorpedoes Unit", Italy put the type to work as a torpedo bomber; in this role, the SM.79 achieved notable successes against Allied shipping in the Mediterranean theatre of the war. A specialised drone version of the aircraft flown by remote control was also developed, although the Armistice with Italy was enacted prior to any operational deployment. It was the most numerous Italian bomber of the Second World War, with about 1,300 built. The type would remain in Italian service until 1952. The SM.79 was a cantilever low-wing monoplane trimotor, with a retractable taildragger undercarriage. The fuselage had a welded tubular steel framework covered with duralumin on the forward section, a mixture of duralumin and plywood across the upper fuselage surface, and fabric for all of the other exterior surfaces. The wings were of all-wood construction, with trailing edge flaps and leading edge slats (Handley Page style) to offset their relatively small size. The structure consisted of three spruce and plywood spars, linked with plywood ribs, with a skin of plywood. The wing had a dihedral of 2° 15'. The ailerons were capable of rotating through +13/-26°, and were used together with the flaps in low-speed flight and in takeoff. The aircraft's capabilities were significantly greater than its predecessor, the SM.75, with over 1,715 kW (2,300 hp) available and a high wing loading that gave it characteristics not dissimilar to a large fighter. For more details of development, design, operational history and 10 variants, click here.
