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| B-20 | |
|---|---|
Second from the top in the middle
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| Type | Autocannon |
| Place of origin | USSR |
| Service history | |
| In service | Soviet Air Forces, Soviet Air Defence Forces |
| Wars | World War II, Korean War |
| Production history | |
| Designer | Mikhail Yevgenyevich Berezin |
| Designed | 1944 |
| Specifications | |
| Mass | 25 kg (55 lb) |
| Length | 2,035 mm (80.1 in) |
| Barrel length | 1,588 mm (62.5 in) |
| Cartridge | 20×99mmR |
| Caliber | 20 mm (0.8 in) |
| Barrels | 1 |
| Action | Gas |
| Rate of fire | 800 rounds/min (600 synchronized) |
| Muzzle velocity | 790–815 m/s (2,590–2,670 ft/s) |
The Berezin B-20 (Березин Б-20) was a 20 mm caliber autocannon used by Soviet aircraftinWorld War II.
The B-20 was created by Mikhail Yevgenyevich Berezinin1944 by converting his 12.7 mmBerezin UB machine gun to use the 20 mm rounds used by the ShVAK cannon. No other changes were made to the weapon which was pneumatically or mechanically charged and was available in both synchronized and unsynchronized versions. In 1946, an electrically-fired version was created for the turrets of the Tupolev Tu-4 bomber until the Nudelman-Rikhter NR-23 cannon became available. The B-20 was a welcome replacement for the ShVAK because it was significantly lighter - 25 kg (55 lb) to the 40 kg (80 lb) ShVAK - without sacrificing rate of fire or muzzle velocity.
The Soviet archives register the following production numbers by year:[1]
Related developments:
Similar weapons:
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| Autocannons, machine guns |
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