METHOD OF CREATION OF REACTIVE FORCE FOR ROTATION OF HELICOPTER JET-DRIVEN ROTOR AND HELICOPTER POWER UNIT OF MAIN ROTOR JET-DRIVE FOR REALIZATION OF THIS METHOD Russian patent published in 1998 - IPC

FIELD: heavier-than-air rotor craft. SUBSTANCE: creation of reactive force is based on application of reactive force to rotor blade tips formed through conversion of chemical energy of fuel into kinetic energy of jet escaping from nozzle of air-jet engine; chemical energy of fuel is converted in succession first into electric energy by means of on-board electric generator and then into thermal energy of superheated vapor in electric heater and finally into kinetic energy of vapor-air jet escaping from nozzle of air-jet engine. Power unit of jet- drive 1 includes air-jet engine 3 working by turbo-piston cycle; engine 3 has flow mixing zone 4 for mixing flow from first exhaust zone 5 and flow from second exhaust zone 6; engine is also provided with members 7 for circulating the part of flow of working medium. Main rotor blades 4 are mounted on helicopter for rotation from on-board engine plant which contains electric generator. EFFECT: enhanced reliability. 3 cl, 3 dwg