| 摘要 |
<p>PURPOSE: A planetary gear for decreasing weight and a manufacturing method thereof are provided to increase a rate of power delivered to a rotor shaft by combining configuration properties for producing synergistic effects. CONSTITUTION: A helicopter(1) comprises fuselage(2), a main motor(4), and a tail rotor(3). The main rotor rotates on a first plane. The main rotor is mounted to a fuselage. The main rotor generates an action for maintaining the whole helicopter in a flight status. A tail rotor is installed on one end part of the fuselage.</p> |
