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HMS Magdala (1870)
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HMS Magdala (1870) : ウィキペディア英語版
HMS Magdala (1870)

HMS'' Magdala'' was a breastwork monitor of the Royal Navy, built specifically to serve as a coastal defence ship for the harbour of Bombay (now Mumbai) in the late 1860s. She was ordered by the India Office for the Bombay Marine. The original specifications were thought to be too expensive and a cheaper design was ordered. While limited to harbour defence duties, the breastwork monitors 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〕 Aside from gunnery practice ''Magdala'' remained in Bombay Harbour for her entire career. The ship was sold for scrap in 1903.
==Design and description==
In July 1866 the India Office asked for two floating batteries to defend Bombay and the Controller of the Navy, Vice Admiral Spencer Robinson recommended that monitors be used. He recommended a design with armour belt and protecting the gun turret, armed with the largest possible guns, which would cost £220,000.〔Brown, p. 57〕 The India Office thought that this was too expensive and ordered a repeat of instead for only £132,400.〔Parkes, p. 167〕
The ships had an length between perpendiculars of , a beam of , and a draught of at deep load. They displaced . Their crew consisted of 155 officers and men.〔
===Propulsion===
''Magdala'' had two horizontal direct-acting steam engines, made by Ravenhill, each driving a single propeller.〔 The ship's boilers had a working pressure of . The engines produced a total of on 21 October 1870 during the ship's sea trials which gave her a maximum speed of . ''Magdala'' carried of coal,〔Ballard, pp. 248–49〕 enough to steam at .〔Silverstone, p. 165〕

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