The invention relates to mechanical engineering. A power installation includes a rotary engine, a compressed-air feeding system and a fuel feeding system, an external combustion chamber, a utilizer, a water reservoir, a water feed pump, and electromagnetic injectors for feeding hot water. Valves of outlet apertures of the external combustion chamber are in the form of piston valves. Gates of the rotary engine are made to be cylindrical, are provided with longitudinal grooves so as to allow rotor pistons to pass under same, are provided with a gear drive driven by a gear wheel affixed to the rotor shaft, and are capable of rotating in a direction opposite to the direction of rotation of the rotor. The external combustion chamber is located in a cavity of an output shaft. The power installation additionally contains a dosing chamber, which is located in the cavity of the output shaft and which is provided with apertures which are connected, by means of the piston valves, to output apertures of the external combustion chamber and to input apertures of working chambers. The electromagnetic injectors for feeding water are connected to the external combustion chamber. The invention is directed at increasing the efficiency of the installation.
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