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Archer-class sloop : ウィキペディア英語版 | Archer-class sloop
The ''Archer''-class sloops were a class of two wooden screw sloops built for the Royal Navy in the late 1840s. Both ships served during the Crimean War, ''Archer'' in the Baltic, and ''Wasp'' in the Black Sea, and they both served on the overseas stations of the British Empire, as far afield as the East Indies and both North and South America. Both played an anti-slavery role off the coasts of West Africa. By 1869 they had both been broken up. ==Design== Orders for two s (''Archer'' and ''Parthian'') were placed with Deptford Dockyard on 26 March 1846. They were suspended in September, and re-ordered as sloops on 25 April 1847. ''Parthian'' was renamed ''Wasp'' while on the stocks on 25 August 1847.〔 They were designed by John Edye and approved by the Surveyor of the Navy's department on 25 August 1847.〔 The completed ships were fitted with a 2-cylinder single-expansion steam engine driving a single screw. Although both ships had their machinery provided by Miller, Ravenhill & Co, ''Archer''s was a horizontal geared steam engine rated at 202 nominal horsepower, while ''Wasp''s was a vertical oscillating engine rated at 100 nominal horsepower. On trials ''Archer'' developed , achieving , and while ''Wasp'' developed only , she was able to achieve a speed of nearly . The armament consisted of two 68-pounder (87cwt) guns,〔 and ten 32-pounder (42cwt) muzzle-loading guns in a broadside arrangement.〔
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