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HMS Esk (1854) : ウィキペディア英語版 | HMS Esk (1854) HMS ''Esk'' was a 21-gun screw corvette launched on 12 June 1854 from J. Scott Russell & Co., Millwall.〔Bastock, p.42.〕 She saw action in the Crimean War, the Second Opium War and the Tauranga Campaign in New Zealand, and was broken up at Portsmouth in 1870. ==Design== ''Esk'' was built in exchange for HMS ''Greenock'' (which went to the Australian Royal Mail Co.) by J. Scott Russell & Co.. The words of the Admiralty Order stated she should be "a wood screw vessel complete of ''Highflyer''s () in exchange when built".〔 This made her a small wooden frigate to a design by the Surveyor's Department of the Admiralty on 25 April 1847; she and her sister ''Highflyer'' were redesignated as corvettes in 1854. In common with other screw corvettes of the time, she was envisaged as a steam auxiliary, intended to cruise under sail with the steam engine available for assistance. Commensurately she was provided with a full square sailing rig. Her oscillating two-cylinder inclined single-expansion steam engine, provided by the builders, was quite different from ''Highflyer''s, but developed broadly the same power — — and drove a single screw.〔
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