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Ordnance BL 12-pounder 6 cwt
The Ordnance BL 12 pounder 6 cwt〔British military traditionally denoted smaller ordnance by the weight of its standard projectile, in this case approximately . "6 cwt" referred to the weight of the gun and barrel to differentiate it from other "12 pounder" guns. One hundredweight (cwt) is , so the total weight was 〕 was a lighter version of the British 12 pounder 7 cwt gun, used by the Royal Horse Artillery in the late 19th and early 20th centuries.
==History==
Problems arose when the standard BL 12 pounder 7 cwt gun was used in the great Indian cavalry manoeuvres of 1891. The carriage was found to be too complicated, and dust caused the metal surfaces of the axle traversing device to seize.〔Hall, December 1972〕 It also proved too heavy for horse artillery, which was intended to support cavalry in battle, to manoeuvre.
The 12 pounder 6 cwt gun was therefore developed in 1892, when the new more powerful cordite replaced gunpowder, as a lighter version of the BL 12 pounder 7 cwt gun. It had a barrel shorter, on a lighter and simpler carriage, and it entered service in 1894. In 1899 a primitive recoil-absorbing system was added. The weapon was made obsolete in British service by the acquisition of the modern quick-firing Ehrhardt QF 15 pounder in 1901, and was replaced by that and later by the QF 13 pounder from 1905.
The early No. 56 Fuze burned too fast, a maximum of only 13 seconds, and hence could only be time set for a maximum range of 3700 yards. The No. 57 "Blue" Fuze was introduced during the Boer war. It had a slower burning powder train and hence could be time set for ranges up to 5800 yards. A maximum range of 6000 yards was quoted in use in the First World War.〔Hogg & Thurston 1972〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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