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Racer-class sloop
The ''Racer''-class sloop was an 11-gun wooden screw sloop class of five ships built for the Royal Navy between 1855 and 1860.
==Design==
Built of a traditional wooden construction, the ''Racer'' class were a lengthened version of the ''Swallow''-class sloop, which in turn had been intended as "type of screw vessel below the ''Cruizer''". The extra length gave greater speed, and combined with a considerable increase in power, this gave a speed of about , rather more than the 7 knots of the previous class.〔Winfield (2004) p.216〕
The class were armed with a single 32-pounder gun (58cwt) gun on a pivot mount and ten 32-pounder (25cwt) carronades on the broadside. These guns were all smoothbore muzzle-loading, and were little changed from the standard guns of Nelson's era.〔Bastock, p.29.〕
Propulsion was provided by a two-cylinder horizontal single-expansion steam engine developing and driving a single screw. At maximum power under steam, top speed was about . A barque rig of sails was carried, which meant the ships of the class had three masts with a square rig on the fore and main masts.〔
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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