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HMS ''Indefatigable'' was an built for the Royal Navy (RN) during World War II. She was completed in 1944, and her aircraft made several attacks that year against the , inflicting only light damage; they also raided targets in Norway. The ship was transferred to the British Pacific Fleet (BPF) at the end of the year and attacked Japanese-controlled oil refineries in Sumatra in January 1945 before joining the American forces in March as they prepared to invade the island of Okinawa in Operation Iceberg. ''Indefatigable'' and the BPF joined the Americans in attacking the Japanese Home Islands in July and August. Following the end of hostilities she visited ports in Australia, New Zealand and South Africa. After returning to the UK in early 1946, ''Indefatigable'' was modified for transport duties, and ferried troops and civilians for the rest of the year before she was reduced to reserve. She was recommissioned in 1950 as a training ship for service with the Home Fleet Training Squadron, participating in exercises and making several port visits overseas. The Board of Admiralty decided that she was redundant in early 1954 and decommissioned her later that year. ''Indefatigable'' was sold for scrap the following year. ==Design and description== The ''Implacable'' class were ordered under the 1938 Naval Programme by the Chamberlain government as part of the general rearmament begun in response to the rise of Nazi Germany and Fascist Italy. The design originated as an improved version of the s and was intended to be faster and carry an additional dozen aircraft over the speed and 36 aircraft of the earlier ships. To remain within the limit allowed by the Second London Naval Treaty, these improvements could only be made by reducing armour protection.〔Friedman, p. 141〕 ''Indefatigable'' was long overall and at the waterline. Her beam was at the waterline,〔Friedman, p. 366〕 and she had a draught of at deep load. The ''Implacable''-class ships were significantly overweight and displaced at deep load.〔Brown, David, p. 49〕 The ships had metacentric heights of at light load and at deep load as completed.〔Friedman, p. 151〕 ''Indefatigable''s complement was approximately 2,300 officers and enlisted men in 1945.〔Hobbs 2013, p. 109〕 The ships had four Parsons geared steam turbines, each driving one shaft, using steam supplied by eight Admiralty 3-drum boilers.〔Chesneau 1980, p. 20〕 The turbines were designed to produce a total of , enough to give the ''Indefatigable''-class ships a maximum speed of .〔Friedman, p. 367〕 On sea trials, ''Indefatigable'' reached speeds of with . She carried a maximum of of fuel oil which gave her a range of at .〔 The armoured flight deck had a maximum width of . A single hydraulic aircraft catapult was fitted on the forward part of the flight deck. The ''Implacable''-class carriers were equipped with two lifts on the centreline, the forward of which measured and served only the upper hangar, and the aft lift (), which served both hangars. The upper hangar was long and the lower hangar was long; both had a maximum width of . Each hangar had a height of only 14 feet which precluded storage of Lend-Lease Vought F4U Corsair fighters as well as many post-war aircraft and helicopters. Designed to stow 48 aircraft in their hangars, the use of a permanent deck park allowed the ''Implacable'' class to accommodate up to 81 aircraft. The additional crewmen, maintenance personnel and facilities needed to support these aircraft were housed in the lower hangar. The ships were provided with of aviation gasoline.〔Brown 1977, pp. 48–49; Friedman, p. 144〕 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「HMS Indefatigable (R10)」の詳細全文を読む スポンサード リンク
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