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BL 6 inch Mk XI naval gun : ウィキペディア英語版 | BL 6 inch Mk XI naval gun
The BL 6 inch Gun Mark XI〔Mk XI = Mark 11, i.e. the eleventh model of BL 6-inch guns. Britain used Roman numerals to denote Marks (models) of ordnance until after World War II.〕 was a British 50 calibres high-velocity naval gun which was mounted as primary armament on cruisers and secondary armament on pre-dreadnought battleships from 1906 onwards. ==History== The gun with its increased length of 50 calibres gave improved firepower over the current 6-inch Mk VII gun of 45 calibres. However, its increased length and weight made it unwieldy in the current manually operated shipboard mountings on light cruisers, which did not provide a steady platform. Britain reverted to 45-calibres guns in new warships from 1914 onwards with the BL 6 inch Mk XII gun.
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「BL 6 inch Mk XI naval gun」の詳細全文を読む
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