| 摘要 |
A starting device of a toy engine comprises a spring, a starting piece, and a unidirectional bevel gear. The motion of the spring between the two fulcrums serves to ensure that the control rod is kept securely in place at a disengaging position and an engaging position. The unidirectional bevel gear is mounted behind the engine propeller and is controlled by the starting piece to prevent the propeller from turning in reverse at the time when the engine is started. The clutch is formed of two clutch pieces which are mounted between the propeller and the engine head. One of the two clutch pieces is mounted on the front end of the propeller shaft for imparting the engine power. Other one of the two clutch pieces is mounted in front of the propeller. The two clutch pieces are symmetrical in construction to each other and are therefore capable of joining together to enable the propeller shaft to actuate the propeller to turn. The clutching mechanism of the two clutch pieces enables the engine propeller to remain in the idling state, thereby resulting in the conservation of power source during the flight of a toy airplane which is equipped with the toy engine. |
