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| {{infobox weapon | {{infobox weapon | ||
| | name = B-20 | | name = B-20 | ||
| | image = | | image = Tula_State_Museum_of_Weapons_(79-30).jpg | ||
| | |
| image_size = 300 | ||
| | caption = Second from the top in the middle | |||
| | origin = ] | | origin = ] | ||
| | type = ] | | type = ] | ||
| Line 24: | Line 25: | ||
| | spec_label = | | spec_label = | ||
| | weight = 25 kg (55 lb) | | weight = 25 kg (55 lb) | ||
| | length = | | length = {{convert|2035|mm|in|1|abbr=on}} | ||
| | part_length = | | part_length = {{convert|1588|mm|in|1|abbr=on}} | ||
| | width = | | width = | ||
| | height = | | height = | ||
| | diameter = | | diameter = | ||
| <!-- Ranged weapon specifications --> | <!-- Ranged weapon specifications --> | ||
| | cartridge = |
| cartridge = 20×99mmR | ||
| | cartridge_weight = | | cartridge_weight = | ||
| | caliber = 20 mm (0.8 in) | | caliber = 20 mm (0.8 in) | ||
| | barrels = |
| barrels = 1 | ||
| | action = Gas | | action = Gas | ||
| | rate = 800 rounds/min | | rate = 800 rounds/min (600 ]) | ||
| | velocity = {{convert| |
| velocity = {{convert|790|-|815|m/s|abbr=on}} | ||
| | range = | | range = | ||
| | max_range = | | max_range = | ||
| Line 43: | Line 44: | ||
| }} | }} | ||
| The '''Berezin B-20''' (Березин Б-20) was a ] ] used by ] aircraft in ]. | The '''Berezin B-20''' (Березин Б-20) was a ] ] used by ] ] in ]. | ||
| ==Development== | ==Development== | ||
| Line 50: | Line 51: | ||
| ==Specifications== | ==Specifications== | ||
| * '''Ammunition:''' ] | * '''Ammunition:''' ] | ||
| * '''Empty weight:''' 25 kg (55 |
* '''Empty weight:''' 25 kg (55 lbs) | ||
| * ''']:''' 750–770 m/s (2,460-2,525 ft/s) | * ''']:''' 750–770 m/s (2,460-2,525 ft/s) | ||
| * '''Rate of fire:''' 800 rounds/min | * '''Rate of fire:''' 800 rounds/min (600 synchronized) | ||
| * ''' |
* '''One-second burst-mass:''' Unsynchronized, 1.27 kg (2.8 lbs); Synchronized, 0.95 kg (2.1 lbs) | ||
| ==Production== | ==Production== | ||
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| | last = Koll | | last = Koll | ||
| | first = Christian | | first = Christian | ||
| | |
| author-link = | ||
| | coauthors = | |||
| | title = Soviet Cannon - A Comprehensive Study of Soviet Arms and Ammunition in Calibres 12.7mm to 57mm | | title = Soviet Cannon - A Comprehensive Study of Soviet Arms and Ammunition in Calibres 12.7mm to 57mm | ||
| | publisher = Koll | | publisher = Koll | ||
| Line 98: | Line 98: | ||
| ] | ] | ||
| ] | ] | ||
| ] | |||
| ] | ] | ||
| ] | |||
| ] | |||
Latest revision as of 00:43, 6 June 2024
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| B-20 | |
|---|---|
.jpg) Second from the top in the middle | |
| 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 aircraft in World War II.
Development
The B-20 was created by Mikhail Yevgenyevich Berezin in 1944 by converting his 12.7 mm Berezin 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.
Specifications
- Ammunition: 20×99mm
- Empty weight: 25 kg (55 lbs)
- Muzzle velocity: 750–770 m/s (2,460-2,525 ft/s)
- Rate of fire: 800 rounds/min (600 synchronized)
- One-second burst-mass: Unsynchronized, 1.27 kg (2.8 lbs); Synchronized, 0.95 kg (2.1 lbs)
Production
The Soviet archives register the following production numbers by year:
- 1944 — 2,275
- 1945 — 7,240
- 1946 — 440
- 1947 — 780
- 1948 — 1,686
- 1949 — 2,931
See also
Related developments:
- Berezin UB machine gun
Similar weapons:
Notes
- Shirokograd, p 119
References
- Широкоград А.Б. (2001) История авиационного вооружения Харвест (Shirokograd A.B. (2001) Istorya aviatsionnogo vooruzhenia Harvest. ISBN 985-433-695-6) (History of aircraft armament)
- Koll, Christian (2009). Soviet Cannon - A Comprehensive Study of Soviet Arms and Ammunition in Calibres 12.7mm to 57mm. Austria: Koll. p. 121. ISBN 978-3-200-01445-9.
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