Berezin UB (Березин УБ - Универсальный Березина, Univeralni Berezina, Berezin Universal) is a 12.7 mm caliber Soviet aircraft machine gun widely used during World War II. This article or section should be merged with . ... Soviet redirects here. ... A machine gun is a fully-automatic firearm that is capable of firing bullets in rapid succession. ... Combatants Allied Powers Axis Powers Commanders {{{commander1}}} {{{commander2}}} Strength {{{strength1}}} {{{strength2}}} Casualties 17 million military deaths 7 million military deaths World War II, also known as the Second World War, was a mid-20th century conflict that engulfed much of the globe and is accepted as the largest and deadliest...

Development

In 1937, M.E. Berezin began designing a new large-caliber aircraft machine gun chambered to the 12.7 mm round used by infantry machine guns. The new design passed factory trials in 1938 and was accepted into service in 1939 under the designation BS (Березин Синхронный, Berezin Sinkhronniy, Berezin Synchronized). While a successful design, BS was not without its faults, the biggest being its cable-operated charging which required considerable physical strength. Continued development resulted in the improved UB which came in three versions: UBK (Kрыльевой, Krylyevoi, for the wings), UBS (Синхронный, Sinkhronniy, Syncrhonized), and UBT (Турельный, Turelniy, for the turret), with UBS and UBK charged by compressed air. UB was accepted into service on April 22, 1941, just two months before the start of the Great Patriotic War. This is a list of aviation-related events from 1937: Events March March 5 - Imperial Airways opens a new flying boat base at Hythe, Hampshire. ... This is a list of aviation-related events from 1938: Events Imperial Airways inaugurates scheduled service from London to Montreal. ... This is a list of aviation-related events from 1939: Events January January 12 - the RAF Auxiliary Air Force Reserve is formed February February 9 - Alex Henshaw sets a new speed record for the round trip between England and Cape Town in 4 days 10 minutes in a Percival Mew... This is a list of aviation-related events from 1941: Events Jacqueline Cochran became the first woman to fly a bomber across the Atlantic Ocean. ... The Eastern Front1 was the theatre of combat between Nazi Germany and its allies against the Soviet Union during World War II. It was somewhat separate from the other theatres of the war, not only geographically, but also for its scale and ferocity. ...

Description

Berezin UB is a gas-operated air-cooled machine gun chambered to the Soviet 12.7 x 108 mm (0.5 x 4.3 in) infantry machine gun round. Ammunition is supplied via a disintegrating link belt with a unique system in which each new round helps to extract the spent cartridge. Another unusual feature is that the belt is advanced during the return of the moving portion of the gun and not during the recoil. Turret installations were charged manually, while wing and synchronized versions utilized pneumatic charging. The gas-operated system for implementing automatic reloading of a firearm is one of five such systems, the others being recoil-operated, gatling, chain, and blowback. ... A machine gun is a fully-automatic firearm that is capable of firing bullets in rapid succession. ...

UB in all variants was used by the vast majority of Soviet military aircraft of World War II. Combatants Allied Powers Axis Powers Commanders {{{commander1}}} {{{commander2}}} Strength {{{strength1}}} {{{strength2}}} Casualties 17 million military deaths 7 million military deaths World War II, also known as the Second World War, was a mid-20th century conflict that engulfed much of the globe and is accepted as the largest and deadliest...

Specifications (UBS)

• Ammunition: 12.7 x 108 mm (0.5 x 4.3 in)
• Empty weight: 21.5 kg (47.3 lb)
• Muzzle velocity: 814-850 m/s (2,670-2,790 ft/s)
• Rate of fire: 700-800 rounds/min
• Mass of one-second burst: 0.8 kg (1.8 lb)

A guns muzzle velocity is the speed at which the projectile leaves the muzzle of the gun. ...

References

• Широкоград А.Б. (2001) История авиационного вооружения Харвест (Shirokograd A.B. (2001) Istorya aviatsionnogo vooruzhenia Harvest. ISBN 9854336956) (History of aircraft armament)

Related content

Related developments:

• Berezin B-20 autocannon

Similar weapons: The Berezin B-20 (Березин Б-20) was a 20 mm caliber autocannon used by Soviet aircraft in World War II. // Development B-20 was created by M.E. Berezin in 1944 by chambering his Berezin UB 12. ...

• Browning M2

An M2 machine gun surrounded by spent shell casings The M2 . ...