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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク ML 8 inch shell gun ： ウィキペディア英語版 ML 8 inch shell gun The ML 8 inch shell guns of 50 cwt, 54 cwt and 65 cwt 〔"Smooth-bored shell guns from which solid shot cannot be fired are designated by the calibre in inches and the weight of the piece". page 39 in Owen "The principles and practice of modern artillery". 1 cwt (abbreviation for hundredweight) = 112 pounds = 51 kg.〕 were the three variants of British cast iron smoothbore muzzle-loading guns designed specifically to fire the new generation of exploding shells pioneered in the early-mid nineteenth century by Henri-Joseph Paixhans. ==Design== The idea behind a gun that could fire spherical exploding shells but not solid armour-piercing shot was that large projectiles capable of carrying a large explosive filling could be fired from comparatively light guns:〔page 42 in Owen "The principles and practice of modern artillery"〕 the 8-inch 68 pounder gun intended to fire solid shot weighed 95 cwt (4,826 kg) compared to the 65 cwt (3,302 kg) of the typical 8-inch shell gun. This was a "chambered" gun, meaning that the area at the breech-end of the gun where the gunpowder propellant charge burned was not of the same cylindrical section as the gun bore itself. The chamber was of the "Gomer" conical pattern, tapering towards the rear, typical of mortars of the day. This was necessitated by the need to minimise the gun's weight while still allowing it to fire a relatively heavy shell : it ensured that the thickest amount of metal surrounded the point of maximum pressure on firing, at the rear of the chamber. However, mortars fired at high elevations, allowing the powder charge to naturally seat into the coned rear end of the chamber, whereas guns such as this fired on a relatively flat trajectory, leading to the powder charge sitting on the bottom of the chamber. Hence in sea service using smaller "reduced" charges such as in short-range actions this slowed the rate of fire as precautions had to be taken to ensure that the powder charge remained correctly positioned within the chamber until firing, to avoid a misfire.〔Douglas, 1860, pages 186-187〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「ML 8 inch shell gun」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.