Dual Thrust Motor
From ExoDictionary
Dual Thrust Motor
A solid-propellant
rocket engine built to obtain dual
thrust.
In a single chamber unit the booster propellant grain may be bonded to the sustainer grain, with the thrust level regulated by mechanically changing the nozzle throat area or by using different grain compositions or configurations. In a dual-chamber unit, the separate chambers may be arranged in tandem, or concentrically.
References
This article is based on NASA's Dictionary of Technical Terms for Aerospace Use
