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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Boeing B-54 ： ウィキペディア英語版 Boeing B-54 The Boeing B-54 was a medium bomber designed by Boeing for use by the United States Air Force. Derived from the YB-50C Superfortress, construction of the prototype was cancelled before completion, and the aircraft was never flown. ==Design and development== Begun in 1947, the B-54 was the planned production version of the YB-50C prototype. The standard Pratt & Whitney R-4360 engines of the normal B-50 bomber were replaced with R-4360-51 Variable Discharge Turbine (VDT) engines, the fuselage was lengthened by over and the wingspan was extended by , which required the installation of outrigger landing gear in the numbers one and four engine nacelles. Large fuel tanks under the outboard wing section were required to carry an additional of fuel to reach the intended range; 14 .50-caliber machine guns comprised the specified defensive armament.〔Jones 1974, p. 183.〕 On May 29, 1948,〔 contracts were placed by the Air Force for 21 B-54A bombers and 52 RB-54A reconnaissance aircraft;〔NMUSAF 2009〕〔Redding and Yenne 1989, p.117.〕 However, on April 18, 1949, the B-54 project was cancelled due to the development of better-performing jet aircraft; construction of the prototype B-54A had started at Seattle but was never completed.〔 The cancellation was lambasted by the Seattle press, who claimed that it was a political decision instead of a military one.〔Olson 2003, p.184.〕 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「Boeing B-54」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.