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Four destroyers in the United States Navy formed the ''Cassin''-class. All served as convoy escorts during World War I. The ''Cassin''s were the first of six "second-generation" 1000-ton four-stack destroyer classes that were front-line ships of the Navy until the 1930s. They were known as "thousand tonners", while the previous classes were nicknamed "flivvers" for their small size, after the Model T Ford. They were the first to carry the new 4 inch/50 caliber (102 mm) guns. The number of torpedo tubes was increased from the six carried by the ''Paulding''-class to eight. The additional armament significantly increased their tonnage to over 1,000 tons and decreased their speed to less than thirty knots (56 km/h), despite an increase in shaft horsepower from 12,000 to 16,000. The ''Aylwin''-class was built concurrently, and those four ships are often considered to be ''Cassin''s. The class performed convoy escort missions in the Atlantic in World War I. Hulls 43-45 served in the United States Coast Guard as part of the Rum Patrol in 1924-31. All were scrapped 1934-35 to comply with the London Naval Treaty.〔Gardiner, p. 122〕 ==Design== The increase in normal displacement to over 1,000 tons was due to the desire to combine a heavy armament with a substantial cruising range. The US Navy at the time had only three modern light cruisers of the ''Chester'' class, so the destroyers had to double as scouts.〔Friedman, p. 32-33〕 The engineering arrangement of two-shaft direct drive turbines was similar to some previous ships, but the poor performance of early cruising turbines caused a reversion to reciprocating engines for cruising. Hulls 43 and 44 had a triple expansion engine that could be clutched to one shaft for cruising; the other pair of ships had a similar arrangement on both shafts..〔Friedman, p. 29〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Cassin-class destroyer」の詳細全文を読む スポンサード リンク
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