Definition of ullage rocket in English:

ullage rocket

Syllabification: ul·lage rock·et

noun

  • An auxiliary rocket engine used in weightless conditions to provide sufficient acceleration to maintain the flow of liquid propellant from the fuel tank.
    More example sentences
    • 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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