|
The ''Boadicea''-class cruiser was a pair of scout cruisers built for the Royal Navy in the first decade of the 20th century. They were the first class of the types to be fitted with steam turbine machinery. ==Design== Like the earlier scout cruisers, the ''Boadicea'' class was designed to provide destroyer flotillas with a command ship, theoretically offering the ability to scout ahead of the group and locate targets for the smaller ships to attack. They were enlarged and more powerfully armed versions of the earlier ships, fitted with steam turbines. Curiously, they were no faster than the older ships and equally unsuccessful in their intended role as they lacked the speed of the destroyers they were supposed to escort.〔Friedman 2009, pp. 111–13〕 Displacing , the ships had an overall length of , a beam of and a deep draught of . They were powered by two sets of Parsons steam turbines, each driving two shafts. The turbines produced a total of , using steam produced by 12 Yarrow boilers that burned both fuel oil and coal, and gave a maximum speed of . They carried a maximum of of coal and of fuel oil that gave them a range of at .〔Friedman 2009, p. 295〕 Her crew consisted of 317 officers and enlisted men.〔Gardiner & Gray, p. 50〕 The main armament of the ''Boadicea'' class consisted of six breech-loading (BL) four-inch Mk VII guns. The forward pair of guns were mounted side by side on a platform on the forecastle, the middle pair were amidships, one on each broadside, and the two remaining guns were on the centreline of the quarterdeck, one ahead of the other.〔 The guns fired their shells to a range of about .〔Friedman 2011, pp. 75–76〕 Her secondary armament was four quick-firing (QF) s and two submerged 21-inch (533 mm) torpedo tubes. During the war, four additional four-inch guns were added amidships to increase her firepower. A QF three-inch 20 cwt〔"Cwt" is the abbreviation for hundredweight, 20 cwt referring to the weight of the gun.〕 anti-aircraft gun was also added. In 1918 it was replaced by a four-inch gun.〔 As scout cruisers, the ships were only lightly protected to maximize their speed. They had a curved protective deck that was thick on the slope and on the flat.〔 Their conning tower was protected by four inches of armour.〔 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「Boadicea-class cruiser」の詳細全文を読む スポンサード リンク
|