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The QF 4-inch gun Mks I, II, III〔I.e. Mark 1, 2 and 3. Britain used Roman numerals to denote Marks (models) of ordnance until after World War 2. Hence this article describes the first three models of British QF 4-inch guns.〕 were early British QF (quick-firing) naval guns originating in 1895. They all had barrels of 40 calibres length. ==Naval service== The gun was intended to be a more powerful alternative to the quick-firing 3-inch QF 12-pounder gun, and a faster-firing replacement for the BL 4-inch gun. It was mounted on the following ships : * third-class protected cruisers of 1896 * s of 1898 * s of 1900 * third-class cruisers, launched in 1903 * s of 1906 Its shell proved insufficiently powerful to make it much of an improvement on the 12-pounder. From 1907 onwards it was succeeded in its class on new warships by the BL 4 inch gun Mk VIII, which fired a shell. 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「QF 4 inch naval gun Mk I – III」の詳細全文を読む スポンサード リンク
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