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When the projectile leaves the gun the pressure in the barrel drops and the gas stored in the reservoir flows back into the barrel. By aiming these holes forward, this flow gives the propellant gasses in the barrel enough forward momentum to draw them out of the barrel. [2] Various designs attempt to improve on the basic concept in a number of ...
A Transparent Armor Gun Shield and a thermal sight system are added to the loader's top-mounted M240B 7.62 mm machine gun, [156] and a Kongsberg Gruppen Remote Weapon Turret carrying a 12.7 mm (.50 in) caliber machine gun (again similar to that used on the Stryker) is in place of the tank commander's original 12.7 mm (.50 in) caliber machine ...
The propulsion system uses an obturating case base with a semi-combustible cartridge wall. It has a total weight of 41.1 lb (18.6 kg) and a 627 mm (24.7 in) DU penetrator with a 27 mm (1.1 in) rod diameter, [ 2 ] which reaches a muzzle velocity of 1,670 meters per second (5,500 ft/s) using 8.1 kg (18 lb) of JA-2 propellant.
A quantity of olive oil and a round shot were left inside in the barrel; With the gun laid horizontally the shot would roll up and down the barrel as the ship caught each wave, effectively lubricating the gun simply through the motion of the ship. [3] Later, the invention of revolving gun turrets meant that all guns were constantly exposed to ...
In the 1960s, smoothbore tank guns were developed by the United States, the Soviet Union, and later by the experimental American-West German MBT-70 joint project. High-precision smoothbore tank gun barrels were perfected by the US Army's Weapons Laboratory at the Watervliet Arsenal based on a pair of patents by inventor Albert L. de Graffenried.
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The barrel is 55 calibres long (L55), i.e., 55 times 120 millimetres, or 6.6 metres (21 ft 8 in). It is made of electro-slag refined steel. The bore and chamber are electro-plated with chromium to give a barrel life of 500 effective full charges. The gun has a split sliding-block breech mechanism.
Stack Tank Oil (STO) density (or API) may also be used by regulatory bodies to classify oil and oil products. Other properties such as Molecular Weight , saturated aromatic resin and asphaltene (SARA), refractive index , wax appearance temperature, asphaltene precipitation, and acid number , are also specified at Stock Tank conditions. [ 1 ]
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