D-56T
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OR:

The 76.2 mm D-56T series rifled
tank gun A tank gun is the main armament of a tank. Modern tank guns are high-velocity, large-caliber artilleries capable of firing kinetic energy penetrators, high-explosive anti-tank, and cannon-launched guided projectiles. Anti-aircraft guns can a ...
is the tank gun used on the
PT-76 The PT-76 is a Soviet Union, Soviet amphibious vehicle, amphibious light tank that was introduced in the early 1950s and soon became the standard reconnaissance tank of the Soviet Army and the other Warsaw Pact armed forces. It was widely exported ...
, which is the only known armoured vehicle to carry it.


Description

The D-56T is an anti-tank gun of 76.2mm calibre. It can fire five types of rounds, using a manual loader system, it has an effective fire rate of six to eight rounds per minute. It has a max effective range of approximately 1500 meters. This gun is 42 calibers long. A typical combat ammunition load consists of 24 x OF-350 Frag-HE, 4 x sub-caliber AP-T, 4 x AP-T and 8 x BK-350M HEAT rounds. The gun is usually mounted in an oval dish-type circular truncated cone turret with flat sloping sides which is mounted over the second, third, and fourth pair of road wheels. All PT-76s have a fume extractor for the main gun at the rear of the turret. Some were fitted with a multi-slotted
muzzle brake A muzzle brake or recoil compensator is a device connected to, or a feature integral to the construction of, the muzzle or barrel of a firearm or cannon that is intended to redirect a portion of propellant gases to counter recoil and unwanted ...
. Most PT-76s typically feature this gun with a double-baffle muzzle brake, except the PT-76B, which is typically fitted with the D-56T gun with a two-plane gun stabiliser, a double-baffle muzzle brake and a
bore evacuator A bore evacuator or fume extractor is a device which removes lingering gases and airborne residues from the barrel of an armored fighting vehicle's gun after firing, particularly in tanks and self-propelled guns. By creating a pressure differe ...
towards the muzzle.


Ammunition

The D-56T usually saw itself firing five types of anti-tank rounds. Most rounds that were used on the D-56T were HE rounds, with usually a ready combat load having 24 pieces of OF-350 High Explosive Fragmentation ammunition, and 16 other pieces, with three other types of rounds. Common ammunition types were the OF-350 Frag-HE, BM-354P HVAP-T and the BK-350M HEAT-FS. *BK-350M High Explosive Anti Tank, Fin Stabilised **Maximum aimed range: 1,000 m **Maximum effective range: 650 in the day, 600 at night **Penetration: 280mm at all distances *OF-350 Fragmentation, High Explosive **Maximum aimed range: 4,000 m **Maximum effective range: 600 at night *BM-354P High-Velocity, Armor-Piercing Tracer **Maximum aimed range: 1,060 m **Maximum effective range: 650 in the day, 600 at night **Penetration: 127 mm point-blank, 50 mm at 1,000 metres


See also

*
PT-76 The PT-76 is a Soviet Union, Soviet amphibious vehicle, amphibious light tank that was introduced in the early 1950s and soon became the standard reconnaissance tank of the Soviet Army and the other Warsaw Pact armed forces. It was widely exported ...


References

* Tank guns of the Soviet Union Cold War artillery of the Soviet Union {{artillery-stub