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HMS Pallas (1865)
HMS ''Pallas'' was a purpose-built wooden-hulled ironclad of the Royal Navy, designed as a private venture by Sir Edward Reed, and accepted by the Board of Admiralty because, as an economy measure, they wished to use up the stocks of seasoned timber held in the Woolwich Dockyard. The fact that Woolwich was not equipped to build iron ships was also relevant.
==Background and design==
She was built as a box-battery ship, with two of her big guns on either broadside and the others mounted in the extreme bow and stern as chase guns. It was possible to achieve axial fire from the battery guns by traversing them to fire fore or aft through recessed embrasures at the corners of the battery. As with similar arrangements in contemporary box-battery ironclads, moving the guns in anything other than calm water would have been extremely hazardous. The small number of guns, and the low weight of the broadside, was excused on the basis that the ship's primary weapon was the ram.
''Pallas'' was the first warship in the Royal Navy to be fitted with compound expansion engines, and a high performance was expected from them; her specification claimed a speed under power of fourteen knots, which was necessary if she were to ram enemy ships who were themselves under way. On her trials, however, riding light, she achieved only , while piling up an enormous bow wave. After her bow contour was hastily modified she was able to just reach , which in the event of armed conflict would have been insufficient to allow her to fulfil her designed ramming function against any enemy ship with an operational power plant.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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