FIELD: engines and pumps.
SUBSTANCE: rocket engine assembly (5) including a liquid oxygen tank (30B), an engine (10) having a combustion chamber (12) and a heat exchanger (46) for converting liquid oxygen into vapour. The rocket engine assembly has an oxygen vapour circuit (60) for directing oxygen vapours into the combustion chamber or into the tank by means of a heater. When directing oxygen vapours in the combustion chamber the engine develops low thrust.
EFFECT: invention provides operation of engine at high and low thrust, avoiding occurrence of oscillatory occurrences in fuel supply system.
12 cl, 4 dwg
