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Ant-class gunboat
The ''Ant''-class gunboat was a class of twenty-four Royal Navy flat-iron gunboats mounting a single 10-inch gun, built between 1870 and 1880.〔 They carried no masts or sails, being among the first Royal Navy vessels not to do so. The last four vessels were ordered separately and are sometimes known as the ''Gadfly'' class, although they were essentially identical. Members of the class lingered on as steam lighters, dredgers, boom defence vessels and base ships, lasting in some cases into the 1950s.
==Design==
The flat-iron gunboats were designed for coastal defence and bombardment, and were constructed from iron. They were not rigged, and the single 10-inch (18 ton) muzzle-loading rifle was fitted forward on a hydraulic mount that allowed it to be lowered for a sea passage and raised for action, thereby improving the vessel's seaworthiness.〔 Power was provided by a pair of two-cylinder horizontal single-expansion steam engines driving twin screws. Together they developed , giving a top speed of about .〔
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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