FIELD: mechanical engineering; rotary engines; air delivery into combustion chamber. SUBSTANCE: blower impeller has profiled blades made to screw surface. Helix angle of blade on outer diameter is 70-80 degrees, and on inner diameter, not less than 55 degrees. Narrow screw slot channels formed by side surfaces of blades preclude back flow of air. EFFECT: enlarged operating capabilities and improved reliability of delivery of air into combustion chamber of rotary engine. 3 dwg
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