“自转旋翼机”(以下简称“旋翼机”)外形酷似直升机,但其飞行机理与直升机不同,成本只有直升机的 1/7左右,营运费只有直升机的1/4左右,其安全性远远高于直升机被称为“世界上最安全的飞机”。旋翼机抗风性强,能在极小场地降落或迫降。但旋翼机有一致命弱点:起飞滑跑距离太长。虽然目前大多数旋翼机都使用“发动机输出轴通过传动软索带动旋翼旋转”以缩短起飞滑跑距离,但它只能略微生效(因为存在“反扭矩”问题)。本人设想不用上述方法,而另创一种方法,来极大缩短旋翼机的起飞滑跑距离,原理如下:在旋翼机主轴底部设一转轮(其周边 “Rotorcraft” (hereinafter referred to as “Rotorcraft ”) resembles a helicopter in appearance, but its flight mechanism is different from that of a helicopter. The cost is only about 1/7 of that of a helicopter. Its operating cost is only about 1/4 of that of a helicopter. Its safety Sex is much higher than a helicopter is called “the safest aircraft in the world.” Rotorcraft wind resistance strong, in a very small space landing or forced landing. However, the rotorcraft has a fatal weakness: take-off and landing distance too long. Although most rotorcraft today use the “engine output shaft to rotate the rotor through the drive cable” to shorten the off-take distance, it only works slightly (because of the “anti-torque” problem). I do not think the above method, but another way to significantly shorten the rotorcraft take-off and landing distance, the principle is as follows: a rotor in the bottom of the rotor axis (its periphery