旋翼航空器由旋转的旋翼产生空气动力。旋翼机的旋翼没有动力驱动，当它在动力装置提供的拉力作用下前进时，迎面气流吹动旋翼像风车似地旋转，从而产生升力。有的旋翼机还装有小固定翼面，由它提供一部分升力。直升机的旋翼是由发动机驱动的，垂直和水平运动所需的拉力都由旋翼产生。
扑翼机又名振翼机，它是人类早期试图模仿鸟类飞行而制造的一种航空器。它用像飞鸟翅膀那样扑动的翼面产生升力和拉力。但是，由于人们对鸟类飞行时翅膀的复杂运动还没有完全了解清楚,加之制造像鸟翅膀那样扑动的翼面还有许多技术上的困难，扑翼机至今还没有获得成功。
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