Definition of ullage rocket in English:

Share this entry

ullage rocket


An auxiliary rocket engine used in weightless conditions to provide sufficient acceleration to maintain the flow of liquid propellant from the fuel tank.
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.
Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.