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Unlike a smoothbore cannon, the 3-inch rifle's projectile retained two-thirds of its muzzle velocity at 1,500 yd (1,372 m) – or 839 ft/s (256 m/s) – so that its rifled projectile was invisible in flight. A smoothbore cannon's projectile retained only one-third of its muzzle velocity at that range and its round shot could be seen in the air ...
The length of the barrel (especially for larger guns) is often quoted in multiples of the caliber, used, for example, in US Naval Rifles 3 in (76 mm) or larger. [2] The effective length of the barrel (from breech to muzzle) is divided by the barrel diameter to give a dimensionless quantity.
The Canon de 4 Gribeauval or 4-pounder was a French cannon and part of the artillery system developed by Jean Baptiste Vaquette de Gribeauval.The Old French pound (French: livre) was 1.079 English pounds, making the weight of shot about 4.3 English pounds.
The T-54 and T-55 tanks are a series of Soviet main battle tanks introduced in the years following the Second World War.The first T-54 prototype was completed at Nizhny Tagil by the end of 1945. [3]
All French field guns had a clearance of 2.705 millimetres (0.106 in) between the cannonball and the inside of the barrel. [19] French 8- and 12-pounders used a special arrangement where the barrel of the cannon was shifted backward about four calibers in order to better distribute the weight while the gun was being moved. [16]
The Combat Vehicle 90 (CV90) (Swedish: stridsfordon 90 ⓘ, strf 90 or Stridsfordon 90) is a family of Swedish tracked armoured combat vehicles designed by the Swedish Defence Materiel Administration (FMV), Hägglund & Söner and Bofors during the mid-1980s to early 1990s, before entering service in Sweden in the mid-1990s.
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