轻型共轴式直升机回避区近似计算

介绍了直升机回避区的意义和生成，并指出影响回避区范围的主要因素是直升机重量、旋翼的转动惯量和密度高度等；拟定了计算轻型共轴式直升机回避区的方法，该方法考虑到共轴式直升机的氯动特点，对国外无因次高度－速度曲线法进行了某些修改，使用此方法对某轻型共轴式直升机的回避区进行了计算，得到了较好的结果。该结果与国外某轻型直升机回避区的飞行试验结果比较接近。

Dangerous region calculations for a light coaxial helicopter

The article has introduced the significance formation of the height velocity diagram of a helicopter and has indicated that gross weight of a helicopter and rotor inertia and density altitude are main factors affecting the dangerous region. On the basis of this, a computational method of light weight coaxial helicopter's height velocity diagram. has given which is produced by modifying the non dimensional height velocity curves mothod on considering the aerodynamic features of a coaxial helicopter. The dangerous region of a light weight coaxial helicopter has been calculated by this method and we have got a fairly satisfactory result. The contour of dangerous region of the light coaxial helicopter is similar to the flight test result of a certain light helicopter in other country.