)自转旋翼机
自转旋翼机简称旋翼机，是介于直升机与飞机之间的一种飞行器。
旋翼机与直升机不同，它的旋翼和发动机没有联系，不能提供拉力和操纵力矩。旋翼机不能像直升机那样作垂直起降飞行。旋翼机与飞机也不同，它主要靠旋翼产生升力，而没有固定机翼或只有辅助的机翼。
旋翼机的结构比较简单，而且失速速度较小，起飞距离短，所以受到业余爱好者的欢迎。它可以用于航空体育和游览活动。在军事上，也可用于执行通信、侦查等任务。
英文
This is a gyroplane, a kind of flying machine between helicopter and airplane.Gyroplane is different from the helicopter. Its rotors are not linked to the engine and cannot provide pulling force and controlling moment. It can’t land and take off vertically. The gyroplane also is different from the airplane. It depends on the rotors to produce lift. It has no fixed wings, or has assistant wings.
The gyroplane has simple structure, low stall speed and short taking off distance, so it is very popular. It can be used in aviation sports and sightseeing. In military affairs, It is used in communication, reconnaissance and so on.
