| 摘要 |
<p>A toy car powered by the jet reaction from an inflated balloon. The car (1) has a tube (7) running from its rear (3) to the roof (2). The neck (9) of a balloon (8) is fixed (6) to the open end of the tube at roof level and is inflated by blowing down the free end of the tube. When the car is released, the reaction of the jet escaping from the rear pushes the car forward. The car is formed form a light plastic shell and the tube passes through circular openings in the shell; the end of the tube to which the balloon is attached being reinforced by a lip.</p> |
