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A 200-litre drum (known as a 55-gallon drum in the United States and a 44-gallon drum in the United Kingdom and the rest of the world) is a cylindrical container with a nominal capacity of 200 litres (55 US or 44 imp gal). The exact capacity varies by manufacturer, purpose, or other factors.
US dry barrel: 7,056 cubic inches (115.6 litres; 3.3 US bushels) . Defined as length of stave 28 + 1 ⁄ 2 in (72 cm), diameter of head 17 + 1 ⁄ 8 in (43 cm), distance between heads 26 in (66 cm), circumference of bulge 64 in (160 cm) outside measurement; representing as nearly as possible 7,056 cubic inches; and the thickness of staves not greater than 4 ⁄ 10 in (10 mm) [2] (diameter ≈ ...
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.
Otherwise, it is carried disassembled in three loads, (barrel, baseplate and bipod with sights, each approximately 11 kg), normally carried by a vehicle or helicopter and assembled for firing from the ground. The weapon can be man-packed by the mortar detachment, in which case the ammunition would be carried by other soldiers of the battalion.
The overall length reduction was achieved by shortening the barrel, using a 200 millimetres length vs. the original 260 millimetres. This has helped to achieve a slower rate of fire of 550 rounds per minute vs. the original 600 rpm of the UZI. Controllability in full-automatic fire results dramatically enhanced.
Several Mks of new steel barrels (the first British all-steel gun, hence the name "Steel Gun") were then produced of 190 lb (86 kg) and 150 lb (68 kg) but were not considered powerful enough. [2] Mk IV of 200 lb (91 kg) with a longer bore was settled on for production in 1873. It was superseded by the RML 2.5-inch Mountain Gun from 1879.
A firkin was also a British unit for the sale of beer.It is one quarter of a barrel and its value depends on the current size of a barrel, but at present: [7]. 1 firkin = 0.25 barrel = 9 imperial gallons = 10.8 U.S. gallons = 41 litres
From the War of 1812 until the 1840s, The U.S. Navy used three classifications: the gun proper, which had a barrel weight of 150 lb (68 kg) per pound of shot, the double-fortified gun which had a barrel weight of 200 lb (91 kg) per pound of shot, and the medium gun, which had a barrel weight of 100 lb (45 kg) per pound of shot. By comparison, a ...