FIELD: applicable in propulsion systems of interorbital transport facilities. SUBSTANCE: the engine uses a receiving device of solar radiation, made as a solar battery with photoelectric transducers, heat accumulator - heat exchanger charged by a high-temperature electric heater using the electrical power produced by the solar battery, tank with propulsive mass, propulsive mass supply system and a nozzle. Modified engine, in which, in addition to heating of propulsive mass, its afterburning with oxidizer is accomplished, uses the same principal assemblies and units as the engine without afterburning, and besides, it has an afterburning chamber, tank with oxidizer, and an oxidizer feed system. EFFECT: simplified problems of engine development, manufacture and use, enhanced ballistic efficiency of their employment. 2 cl, 3 dwg
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