Berezin B-20
Encyclopedia
The Berezin B-20 was a 20 mm caliber
autocannon
used by Soviet aircraft in World War II
.
by chambering his Berezin UB
12.7 mm machine gun for 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 is was significantly lighter (25 kg (55 lb) vs ShVAK's 40 kg (80 lb)) without sacrificing rate of fire or muzzle velocity.
Similar weapons:
20 mm caliber
The 20 mm caliber is a specific size of cannon or autocannon ammunition, commonly the smallest caliber which is unambiguously a cannon and not a heavy machine gun....
autocannon
Autocannon
An autocannon or automatic cannon is a rapid-fire projectile weapon firing a shell as opposed to the bullet fired by a machine gun. Autocannons often have a larger caliber than a machine gun . Usually, autocannons are smaller than a field gun or other artillery, and are mechanically loaded for a...
used by Soviet aircraft in World War II
World War II
World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...
.
Development
The B-20 was created by M.E. Berezin in 19441944 in aviation
This is a list of aviation-related events from 1944:-January:* United States Coast Guard pilot Lieutenant, junior grade, Stewart Graham makes the first helicopter flight from a merchant ship in convoy in the North Atlantic Ocean...
by chambering his Berezin UB
Berezin UB
Berezin UB was a 12.7 mm caliber Soviet aircraft machine gun widely used during World War II.-Development:...
12.7 mm machine gun for 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
1946 in aviation
This is a list of aviation-related events from 1946:- Events :* The American Section of the International League of Aviators resurrects the National Trophy, a Harmon Trophy awarded from 1926 to 1938 to the outstanding aviator of the year in each of the 21 member countries of the now-defunct League...
, an electrically-fired version was created for the turrets of the Tupolev Tu-4
Tupolev Tu-4
The Tupolev Tu-4 was a piston-engined Soviet strategic bomber that served the Soviet Air Force from the late 1940s to mid 1960s...
bomber until the Nudelman-Rikhter NR-23
Nudelman-Rikhter NR-23
The Nudelman-Rikhter NR-23 is a Soviet cannon widely used in military aircraft of the Soviet Union and Warsaw Pact. It was designed by A. E. Nudelman and A.A. Rikhter to replace the wartime Nudelman-Suranov NS-23 and VYa cannon, entering service in 1949....
cannon became available. The B-20 was a welcome replacement for the ShVAK because is was significantly lighter (25 kg (55 lb) vs ShVAK's 40 kg (80 lb)) without sacrificing rate of fire or muzzle velocity.
Specifications (B-20)
- Ammunition: 20 x 99 mm (0.8 x 3.9 in)
- Empty weight: 25 kg (55 lb)
- Muzzle velocityMuzzle velocityMuzzle velocity is the speed a projectile has at the moment it leaves the muzzle of the gun. Muzzle velocities range from approximately to in black powder muskets , to more than in modern rifles with high-performance cartridges such as the .220 Swift and .204 Ruger, all the way to for tank guns...
: 750-770 m/s (2,460-2,525 ft/s) - Rate of fire: 800 rounds/min
- Mass of one-second burst: 0.95 kg (2.1 lb)
Related content
Related developments:- Berezin UBBerezin UBBerezin UB was a 12.7 mm caliber Soviet aircraft machine gun widely used during World War II.-Development:...
machine gun
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