| 摘要 |
A toy aeroplane composed of a fuselage, a gear box fixed to the fuselage, a wheel axle holder rotatably mounted in the gear box, a wheel axle which extends rotatably through the gear box and the wheel axle holder and which carries a wheel at each end thereof, a further wheel which is rotatably mounted to the fuselage in front of the gear box, an electric motor mounted in the gear box, a reduction gear mounted in the gear box for transmitting rotation of the electric motor to the wheel axle and to the wheel axle holder and a crank mounted in the gear box for periodically changing the direction of rotation of the wheel axle holder. The axis of rotation of the wheel axle holder is perpendicular to the wheel axle and extends downwardly from the rear to the front of the toy aeroplane, whereby in use, the toy aeroplane turns and tilts alternately to the left and to the right.
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