To implement orbit maneuvering,rendezvous and docking,and soft landing on planets,the throttling liquid rocket engine is preferable.The 7500 N variable thrust engine applied in the Chang'E-3 prober is the first throttling liquid rocket engine in china.It can throttle fast with high precision and continuous variability based on the control commands.The trajectory correction and soft landing on the moon is accomplished.This paper provides the development of the 7500 N variable thrust engine,including the technique scenarios,the key technologies and the tests.The test and flight results show that the system is feasible,its performance is high and it works reliably.
Chang'E-37500 N variable thrust enginethe pintle injectorvariable throat area cavitating venturi
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