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The ''Iris'' class comprised two ships, and , which served with the Royal Navy. They were the Royal Navy's first all steel ships. ==Description== They were designed as dispatch vessels by William White under the direction of Nathaniel Barnaby but were later re-created as Second Class Cruisers. They were distinguished by their long, slender hulls which were influenced to an unprecedented degree by their machinery. This combination of fine lines and powerful twin Maudslay engines made them the fastest ships of their day, with ''Mercury'' attaining from her 7,735 horsepower. This class re-established the traditional status of cruisers as being the eyes of the fleet - being faster than the contemporary ships of the line. Despite being genuine steamers, the ships still sported a light barque sailing rig on completion, although this anachronism was gradually reduced and eventually removed. The ships were not armoured but extensive internal subdivision gave them some protection against flooding. At (''Mercury'') and (''Iris''), respectively, and with a beam of they displaced 3,730 tons fully loaded. The ships carried 780 tons of coal. They were originally armed with ten 64-pounder rifled muzzle-loading (RML) guns and 4 torpedo carriages, but converted in 1888 to fifteen breechloading BL 5 inch guns. Both ships were built at the Pembroke Dockyard. ''Iris'' was launched in 1877 and sold in 1905 while ''Mercury'', launched a year later, was hulked at Chatham in 1914 and sold for scrap in 1919. 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「Iris-class cruiser」の詳細全文を読む スポンサード リンク
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