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HMS ''Hydra'' was the second ship completed of the four breastwork monitors built for the Royal Navy during the 1870s. The ships were ordered to satisfy demands for local defence during the war scare of 1870, but the pace of construction slowed down tremendously as the perceived threat of war declined. The ship spent most of her career in reserve; her only sustained period in commission was four months during the Russo-Turkish War in 1878 when the British were trying to force the Russians to end the war without seizing Constantinople. ''Hydra'' was sold for scrap in 1903. ==Design and description== The ships had an length between perpendiculars of , a beam of , and a draught of at deep load. They displaced . Their crew consisted of 156 officers and men.〔Parkes, p. 213〕 The ''Cyclops''-class ships and other ships of her type were described by Admiral George Alexander Ballard as being like "full-armoured knights riding on donkeys, easy to avoid but bad to close with."〔Ballard, p. 219〕 While not unfit to face heavy weather their decks were frequently awash in even a moderate sea. Their accommodations were rated the worst in the fleet, referred to by ordinary seamen as "ratholes with tinned air".〔Ballard, pp. 218〕 ===Propulsion=== ''Hydra'' had two 4-cylinder inverted compound steam engines made by John Elder, each driving a single propeller. The ship's boilers had a working pressure of . The engines produced a total of on 4 July 1872 during the ship's sea trials which gave her a maximum speed of . ''Hydra'' carried of coal,〔Ballard, pp. 246–49〕 enough to steam at .〔Silverstone, p. 169〕 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「HMS Hydra (1871)」の詳細全文を読む スポンサード リンク
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