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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 RL10 ： ウィキペディア英語版 RL10 The RL10 is a liquid-fuel cryogenic rocket engine used on the Centaur, S-IV and DCSS upper stages. Built in the United States by Aerojet Rocketdyne (formerly by Pratt & Whitney Rocketdyne), the RL10 burns cryogenic liquid hydrogen and liquid oxygen propellants, with each engine producing of thrust in vacuum depending on the version in use. The RL10 was the first liquid hydrogen rocket engine to be built in the United States, and development of the engine by Marshall Space Flight Center and Pratt & Whitney began in the 1950s, with the first flight occurring in 1961. Several versions of the engine have been flown, with two, the RL10A-4-2 and the RL10B-2, still being produced and flown on the Atlas V and Delta IV. The engine produces a specific impulse (''I''sp) of in a vacuum and has a mass ranging from (depending on version). Six RL10A-3 engines were used in the S-IV second stage of the Saturn I rocket, one or two RL10 engines are used in the Centaur upper stages of Atlas and Titan rockets and one RL10B-2 is used in the upper stage of Delta IV rockets. ==History== The RL10 was first tested on the ground in 1959, at Pratt and Whitney's Florida Research and Development Center in West Palm Beach, Florida.〔Connors, p 319〕 It was first flown in 1962 in an unsuccessful suborbital test;〔(【引用サイトリンク】publisher=Gunter's Space Pages )〕 the first successful flight took place on November 27, 1963.〔(【引用サイトリンク】title=Renowned Rocket Engine Celebrates 40 Years of Flight )〕 For that launch, two RL10A-3 engines powered the Centaur upper stage of an Atlas launch vehicle. The launch was used to conduct a heavily instrumented performance and structural integrity test of the vehicle.〔(【引用サイトリンク】title=Atlas Centaur 2 )〕 The RL-10 was designed for the USAF from the beginning as a throttleable motor for the Lunex lunar lander, finally putting this capability to use twenty years later in the DC-X VTOL vehicle.〔(【引用サイトリンク】title=Encyclopedia Astronautica - Lunex Project page )〕 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「RL10」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.