ShVAK cannon
| ShVAK | |
|---|---|
| Type | Autocannon |
| Place of origin | USSR |
| Service history | |
| In service | From 1936 |
| Used by | Soviet armed forces |
| Wars | From World War II |
| Production history | |
| Designer | Boris Shpitalniy and Semyon Vladimirov |
| Designed | 1935–1936 |
| Produced | 1936–1946 |
| Variants | Three 20 mm variants for aircraft mounts plus, one tank variant (TNSh) also, 12.7 mm predecessor |
| Specifications | |
| Mass | 55 kg (121.3 lb) (MP) 44.5 kg (98.1 lb) (SP) 40 kg (88.2 lb) (TP) 38 kg (83.8 lb) (KP) |
| Length | 2,325 mm (91.5 in) (MP) 2,074 mm (81.7 in) (SP) 1,729 mm (68.1 in) (TP) 1,679 mm (66.1 in) (KP) |
| Barrel length | 1,650 mm (65.0 in) (SP,MP) 1,255 mm (49.4 in) (KP,TP) |
| Cartridge | 20×99mmR 12.7x108mmR |
| Cartridge weight | (OZ) 96.0 |
| Caliber | 20 mm (0.787 in) 12.7 mm (0.500 in) |
| Barrels | 1 |
| Action | Gas-operated |
| Rate of fire | 700–800 rounds/min (550-750 synchronized SP) |
| Muzzle velocity | 750–790 metres per second (2,500–2,600 ft/s) |
| Feed system | Belt-fed |
| Filling weight | (OZ) 2.8 g HE + 3.3 g incendiary |
Detonation mechanism | (OZ) Nose fuze |
The ShVAK (Russian: ШВАК: Шпитальный-Владимиров Авиационный Крупнокалиберный, Shpitalnyi-Vladimirov Aviatsionnyi Krupnokalibernyi, "Shpitalny-Vladimirov Aviation Large-calibre") was a 20 mm autocannon used by the Soviet Union during World War II. It was designed by Boris Shpitalniy and Semyon Vladimirov and entered production in 1936. ShVAK were installed in many models of Soviet aircraft. The TNSh was a version of the gun produced for light tanks (Russian: ТНШ: Tankovyi Nudel’man-Shpitalnyi). ShVAK shares the name with its 12.7 mm heavy machine gun predecessor.