FIELD: transmissions of helicopter coaxial rotors. SUBSTANCE: kinematic linkage includes two input shafts connected with engine, two coaxial main rotors of opposite rotation, planetary closed mechanism with two coaxial output members; each output member is connected with shaft of main rotor; it is also provided with one input member, integrating cylindrical gear wheel connected with input member of planetary closed mechanism and two symmetrical kinematic chains running from input shaft including overrunning clutches, bevel stage and cylindrical stage. Ratio of cylindrical stage is equal to or is lesser than ratio of planetary closed mechanism. EFFECT: optimal arrangement of individual members; reduced overall dimension and mass; enhanced efficiency. 2 dwg
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