飞旋镖又叫飞去来器,这原是澳洲人打猎用的工具。外形象个镰刀(图1),前翼长后翼短。短翼装有配重,以便使它的重心位于两翼交接的中心(C处)。它的特点是,掷出去后能自动地飞回原处,其航线是一个宽大的圈,现今,杂技演员有时也用它来为观众表演。当我们掌握了它的搠法以后,它也是一项很有趣味的运动项目。飞旋镖的运动原理是这样的:当它被掷出时,手给了它一个向前运动的力和本身自转的力。自转时,长翼升力较短 The boomerang is also called the flying device, which was originally used by Australians to hunt. The appearance of a sickle (Figure 1), the front wing is long and the rear wing is short. The short wing is equipped with a counterweight so that its center of gravity lies in the center of the two wings (C). Its characteristic is that after throwing out, it can fly back to the original place automatically. Its route is a large circle. Nowadays, acrobats sometimes use it to perform for the audience. When we learned how to use it, it was also a very interesting sport. The principle of the boomerang’s movement is this: When it is thrown, the hand gives it a forward-moving force and a self-rotating force. Longer wing lift is less when turning