英语词汇“ullage rocket”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	ullage rocket
释义	ullage rocket noun An auxiliary rocket engine used in weightless conditions to provide sufficient acceleration to maintain the flow of liquid propellant from the tank.At T + 60: 50 min one of 4 solid ullage rockets in 4th stage did not fire causing the stage to tumble.... There are two jettisonable ullage rockets for propellant settling before engine ignition. This kit includes four integrally molded ullage rockets for Apollos 8 through 14, but they are positioned incorrectly.
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