page_title: Savoia-Marchetti SM.79 Sparviero
section_title: Armament
hierarchical_section_title: Savoia-Marchetti SM.79 Sparviero / Design / Armament
caption_attribution_description: English: photo by Andrea Nicola, my father, photographer of the Regia Aeronautica (Italian Royal Air Force) in the period 1940-1942. This image show the 193ª Squadriglia (193th Squadrilla), 87º Gruppo (87th Group), 30º Stormo (30th Wing). Italiano: fotografia di Andrea Nicola, mio padre, fotografo della Regia Aeronautica nel periodo 1940-1942. L'immagine ritrae la 193ª squadriglia, 87º Gruppo, 30º Stormo. Riccardo Nicola. --Elwood 00:23, 8 dic 2005 (CET)
context_page_description: The Savoia-Marchetti SM.79 Sparviero was a three-engined Italian medium bomber developed and manufactured by aviation company Savoia-Marchetti. It could 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, who nicknamed it il gobbo maledetto.
  The SM.79 was originally developed in the early 1930s as a cantilever low-wing monoplane of combined wood and metal construction. It had been designed with the intention of producing a swift eight-passenger transport aircraft, capable of besting even the fastest of its contemporaries, but had quickly attracted the attention of the Italian government with its potential as an armed combat aircraft. Performing its first flight on 28 September 1934, 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. 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.
context_section_description: The defensive armament of the SM.79 initially consisted of four, later increased to five, Breda-SAFAT machine guns. Three of these were 12.7 mm (0.5 in) guns, two of which were positioned in the dorsal "hump", with the forward one (with 300 rounds) fixed at an elevation of 15°, and the other manoeuvrable with 60° pivotal movement in the horizontal, and 0–70° in the vertical plane. The third 12.7 mm (0.5 in) machine gun was located ventrally. Each gun except for the forward one was equipped with 500 rounds. There was also a 7.7 mm (0.303 in) Lewis Gun in one of a pair of "waist" mounts, not unlike what the B-17 Flying Fortress possessed, on a mount that allowed rapid change of side of the weapon. This Lewis gun was later replaced by two 7.7 mm (0.303 in) Bredas in the waist mounts, which were more reliable and faster firing (900 rounds/min instead of 500), even though there was sufficient room in the fuselage for only one man to operate them. Despite the low overall "hitting power", it was heavily armed by 1930s standards, the armament being more than a match for the fighter aircraft of the time, which were not usually fitted with any armour. By the Second World War, however, the Sparviero's vulnerability to newer fighters was significant, and it lost the reputation for near-invulnerability that it had gained over Spain.
  No turrets were ever installed upon any SM.79s, which imposed considerable limitations upon its fields of defensive fire. Of all its defensive weapons, the dorsal one was often considered to be the most important as, following the shift to low-level attacks, the Sparviero was attacked almost exclusively from the rear and above. The defensive weapons located in the rear gondola and the rear hump were protected by aerodynamic shields, which were intended to only be opened in the event of attackers appearing. However, in practice, an enemy aircraft could attack the Sparviero while remaining unseen, so the defensive positions were usually left open even though this had the effect of reducing the aircraft's maximum effective speed.
  The cramped layout of the ventral gondola, with the bomb-aiming instruments located in front and the rearwards-aimed ventral defensive machine gun in the rear, made it impossible to perform both bomb-aiming and rear defence simultaneously, so its usefulness was compromised. Because of this, in the later versions which were used exclusively for torpedo-bombing tasks, the ventral weapon and nacelle were removed. The fixed forward Breda machine gun, more suited to offensive tasks and aimed by the pilot, was seldom used defensively, and was often removed or replaced with a smaller calibre gun or mock-up, with an associated gain in speed and range due to the reduction in weight. The rear ventral gondola on the Sparviero was somewhat similar to the almost identically located Bola emplacement on the main wartime production -P and -H subtypes of the Heinkel He 111 German medium bomber, which was only used as a ventral defensive armament mount on the German aircraft.
  As with the Luftwaffe's He 111, the Sparviero's bomb bay was configured to carry bombs vertically; this design decision had the consequence of preventing large bombs from being accommodated internally. The aircraft could accommodate a pair of 500 kg (1,100 lb), five 250 kg (550 lb), 12 100 or 50 kg (220 or 110 lb) bombs, or hundreds of bomblets. The bombardier, who had an 85° forward field of view from their position, was normally provided with a "Jozza-2" aiming system, automatic cameras and a series of bomb-release mechanisms. The machine gun to the rear of the gondola prevented the bombardier from lying in a prone position, and as a result, the bombardier was provided with retractable structures to support his legs while seated.
  From 1939 onwards, torpedoes were carried externally, as were larger bombs, with two hardpoints fitted under the inner wing. Theoretically, two torpedoes could be carried, but the performance and the manoeuvrability of the aircraft were so reduced that usually only one was carried. The SM.79's overall
caption: A flight of four SM.79s showing their rear-cockpit mounted machine guns
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