The Berezin UB ( Russian : УБ - Универсальный Березина ) ( Berezin's Universal ) was a 12.7 mm caliber Soviet aircraft machine gun widely used during World War II .
9-451: UBK is acronym that may be related to: Berezin UB § Development Ukraine without Kuchma , the 2001 Ukrainian protests against President Leonid Kuchma Topics referred to by the same term [REDACTED] This disambiguation page lists articles associated with the title UBK . If an internal link led you here, you may wish to change
18-541: 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). The rate of fire made it well suited for use as defensive armament in aircraft. While a successful design, BS was not without its faults,
27-571: The German invasion of the Soviet Union . The Berezin UB is a gas-operated air-cooled machine gun chambered for the Soviet 12.7×108mm 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
36-646: The Beresin." The following production numbers could be found in the Soviet archives: The Berezin B-20 autocannon used an upscaled version of the UB mechanism. The Volkov-Yartsev VYa-23 autocannon used an upscaled version of the UB mechanism. Berezin B-20 The Berezin B-20 (Березин Б-20) was a 20 mm caliber autocannon used by Soviet aircraft in World War II . The B-20
45-579: The Shkas, the Beresin was deliberately expendable, that is, the Soviets' plan was to discard the entire gun after a short period of use during which one or another of the principal operating mechanisms became worn or broken." The same report notes that: "The design of the Beresin machine gun was greatly influenced by a captured Lahti 20-mm machine cannon; many features of the Finnish gun appear in all models of
54-436: 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 (Крыльевой, Krylyevoi, for the wings), UBS (Синхронный, Sinkhronniy, Synchronized), and UBT (Турельный, Turelniy, for the turret), with UBS and UBK charged by compressed air. The UB was accepted into service on April 22, 1941, just two months before
63-510: The gun and not during the recoil. Turret installations were charged manually, while wing and synchronized versions utilized pneumatic charging. The UB in all variants was used by the vast majority of Soviet military aircraft of World War II . A declassified 1952 US intelligence report notes that: "The Shkas was a comparatively intricate and well finished gun, the cost of which necessitated that it be kept in operating condition as long as possible by repair and replacement of parts. In contrast to
72-500: The link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=UBK&oldid=1208898815 " Category : Disambiguation pages Hidden categories: Short description is different from Wikidata All article disambiguation pages All disambiguation pages Berezin UB#Development In 1937, Mikhail Berezin [ ru ] began designing
81-540: 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
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