| 摘要 |
PROBLEM TO BE SOLVED: To realize stable flying by facilitating the control of a flying posture, wherein the necessary of generating a propelling force in a direction for canceling reaction torque is eliminated, the opposite operation torque being generated by the rotation of a tail rotor because the reaction torque of a reverse direction to the rotational direction of a main rotor is transmitted to a fuselage when a driving force is transmitted from an engine through a gear mechanism to the main rotor in a helicopter. SOLUTION: By employing a propelling force generator provided with an output turbine 10 having a turbine shaft directly connected to the drive shaft 2 of a main rotor 1 and a gas generator 20 for generating a gas flow used to actuate the output turbine 10, the necessity of providing a tail rotor 5 to cancel reaction torque is eliminated, the frying posture control of a fuselage is facilitated, and thus stable frying is realized.
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