FIELD: rocket engineering. SUBSTANCE: engine has housing, chamber with overheated water and gas generator arranged inside the chamber and playing a role of a source of additional heating of fluid. The generator is made up as pipe arranged along the housing of the engine. The pipe is filled with hydrogen peroxide with a catalyzer. From the side of the catalyzer the open end of the pipe of the gas generator is connected with the chamber of the engine. At the inlet to the nozzle the chamber is provided with a mixer of steam-gas and overheated water. According to second embodiment the source of additional heating of fluid is operated by hydraulically reacting fuel, whereas in accordance to the third embodiment the source is made up as a heat accumulator. EFFECT: enhanced efficiency. 13 cl, 8 dwg
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