Ullage Motor
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.
Read more about Ullage Motor: Description
Famous quotes containing the word motor:
“We disparage reason.
But all the time it’s what we’re most concerned with.
There’s will as motor and there’s will as brakes.
Reason is, I suppose, the steering gear.”
—Robert Frost (1874–1963)