present participle of ullage

In a wine bottle, the empty space between the cork and the top of the wine.

To gauge the amount of empty space between the top of a cask and the level of liquid inside it.

plural of ullage

Of a container: possessing a significant amount of ullage (empty space).

simple past tense and past participle of ullage

(astronautics) A small, auxiliary rocket engine or motor onboard a spacecraft that provides enough acceleration to settle propellant in a tank.

waste gas (gaseous phase fluid), which fills the ullage space of a tank

plural of ullage motor