翻訳と辞書 Words near each other ・ Read 'Em and Weep ・ Read (All-England cricketer, 1773) ・ Read (automobile) ・ Read (Biology) ・ Read (magazine) ・ Read (surname) ・ Read (system call) ・ Read About It ・ Read Across America ・ Read All About It ・ Read All About It (song) ・ Read All About It! ・ Read All About It, Pt. III ・ Read and Campbell Limited ・ Reaction Motors XLR11 ・ Reaction Motors XLR99 ・ Reaction norm ・ Reaction of degeneration ・ Reaction of Russian intelligentsia to the 2014 annexation of Crimea ・ Reaction progress kinetic analysis ・ Reaction quotient ・ Reaction rate ・ Reaction rate constant ・ Reaction Records ・ Reaction Research Society ・ Reaction shot ・ Reaction step ・ Reaction Time ・ Reaction to a radial load (tensioned wire spoked wheel) ・ Reaction to Action Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Reaction Motors XLR99 ： ウィキペディア英語版 Reaction Motors XLR99 The XLR99 engine was the first large, throttleable, restartable liquid-propellant rocket engine. Development began in the 1950s by the Reaction Motors Division of Thiokol Chemical Company to power the X-15 research aircraft. It could deliver up to 57,000 pounds force (254 kN) of thrust with an Isp of 279 seconds (239 seconds sl). Thrust was variable from 50 to 100 percent, and the restart capability allowed it to be shut down and restarted during flight when necessary. ==Design and development== The engine is propelled by liquid oxygen and anhydrous (water-free) ammonia, pumped into the engine by turbines at a flow rate of over 10,000 lbs (4,500 kg) per minute. After one hour of operation, the XLR99 required an overhaul. Operating times nearly twice that were recorded in tests, but declared largely unsafe. The basic X-15 aircraft carried fuel for about 83 seconds of full-powered flight, while the X-15A-2 carried fuel for just over 150 seconds. Therefore, each XLR99 was capable, in theory, of between 20 and 40 flights before an overhaul. Like many other liquid-fuel rocket engines, the XLR99s used regenerative cooling, in that the thrust chamber and nozzle had tubing surrounding it, through which the propellant and oxidizer passed before being burned. This kept the engine cool, and preheated the fuel. The basic engine weighs 910 lb, or 413 kg. 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「Reaction Motors XLR99」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.