FIELD: water and air transport; hydraulic and wind power engineering. SUBSTANCE: device contains sail surfaces secured on axles mounted rotatably on endless conveyer cloth perpendicularly to it and guides. Sail surfaces are made in form of Fletner and Savonius rotors secured on conveyer cloth both outside and inside in symmetrical pairs. End sections of their axles hold rollers supported by above-mentioned guides. Diameter of rollers is lesser than diameter of Fletner rotor by at least four times. EFFECT: enhanced efficiency. 2 dwg
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