Ullage motor

（重定向自Ullage rocket）

Ullage motors (also known as ullage engines or ullage rockets) are relatively small, independently fueled rocket engines that may be fired to accelerate the rocket prior to main engine ignition, when the vehicle is in a zero-g situation.

单词	Ullage rocket
释义	Ullage rocket 英语百科 Ullage motor （重定向自Ullage rocket） Ullage motors (also known as ullage engines or ullage rockets) are relatively small, independently fueled rocket engines that may be fired to accelerate the rocket prior to main engine ignition, when the vehicle is in a zero-g situation.
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