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Bagley-class destroyer
The ''Bagley'' class of eight destroyers was built for the United States Navy. They were part of a series of USN destroyers limited to 1,500 tons standard displacement by the London Naval Treaty and built in the 1930s.〔(Comparison of 1500-ton classes ) at (Destroyer History Foundation )〕 All eight ships were ordered and laid down in 1935 and subsequently completed in 1937. Their layout was based on the concurrently-built ''Gridley'' class destroyer design and was similar to the ''Benham'' class as well; all three classes were notable for including sixteen 21 inch (533 mm) torpedo tubes, the heaviest torpedo armament ever on US destroyers.〔Friedman, pp. 90-91〕 They retained the fuel-efficient power plants of the ''Mahan''-class destroyers, and thus had a slightly lower speed than the ''Gridley''s. However, they had the extended range of the ''Mahan''s, farther than the ''Gridley''s.〔Friedman, pp. 468-469〕 The ''Bagley'' class destroyers were readily distinguished visually by the prominent external trunking of the boiler uptakes around their single stack.
All eight ''Bagley''-class destroyers were present at the attack on Pearl Harbor on 7 December 1941. They all served in the Pacific during World War II, with ''Jarvis'', ''Blue'', and ''Henley'' lost in combat. In 1944 ''Mugford'' suffered extensive damage from a ''kamikaze'' hit that put her out of combat for six months. ''Ralph Talbot'' later received a ''kamikaze'' hit off Okinawa. After the war, ''Bagley'', ''Helm'', and ''Patterson'' were decommissioned in 1945 and scrapped in 1947. ''Mugford'' and ''Ralph Talbot'', still in commission, were targets during the Operation Crossroads atomic bomb tests at Bikini atoll in 1946. Contaminated by radiation, they were scuttled off Kwajalein in 1948.〔(''Bagley''-class destroyers ) at (Destroyer History Foundation )〕
==Design==
The eight ''Bagley''s were part of a series of three classes with similar characteristics laid down 1935-1937. The other two were the ''Gridley'' class (4 ships) and the ''Benham'' class (10 ships). All three featured four 5 inch (127 mm) dual purpose guns (anti-surface and anti-aircraft) and sixteen 21 inch (533 mm) torpedo tubes in four quadruple mounts as built, the largest number of torpedo tubes on any US destroyers.〔 Although all had only one stack, they differed primarily in their machinery. The ''Bagley''s were a Navy design that duplicated the machinery of the preceding long-range ''Mahan'' class; this led to their prominent boiler uptakes around the single stack that were their main recognition feature. The ''Gridley''s were designed by Bethlehem Shipbuilding Company with advanced high-pressure boilers (also built by Bethlehem) but turbines generally similar to the earlier ''Farragut'' class, which limited their range. The ''Benham''s were a Gibbs & Cox design with another new boiler design that allowed a reduction from four boilers to three, with an efficient turbine arrangement resembling the ''Mahan''s'.〔〔〔Bauer and Roberts, pp. 186-187〕
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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