According to the axial flow propeller helicopter, six fixed pitch propellers are adopted, and the rotating directions of a first center propeller, a second center propeller and a third center propeller are the same; the projections of the rotation centers of the first center propeller, the second center propeller and the third center propeller on the horizontal plane are located on the center of an equilateral triangle formed by connecting lines of projections of the rotation centers of the left propeller, the right propeller and the tail propeller on the horizontal plane, during hovering, due to the fact that wake flows of the first center propeller, the second center propeller and the third center propeller coaxially flow, the wake flow of the third center propeller improves the inflow speed of the second center propeller, efficiency of the second center propeller is improved, the wake flow of the second center propeller improves the inflow speed of the first center propeller, efficiency of the first center propeller is improved, hovering efficiency of the axial flow propeller helicopter is improved, and the whole helicopter occupies a small space and can fly in a narrow space.

    一种轴流螺旋桨直升机,采用六个定距螺旋桨,其中,第一中心螺旋桨、第二中心螺旋桨和第三中心螺旋桨的转向相同,第一中心螺旋桨、第二中心螺旋桨和第三中心螺旋桨的旋转中心在水平面的投影在左边螺旋桨、右边螺旋桨和尾螺旋桨的旋转中心在水平面的投影的连线构成的等边三角形的中心上,在悬停时,由于第一中心螺旋桨、第二中心螺旋桨和第三中心螺旋桨的尾流同轴流动,第三中心螺旋桨的尾流提高了第二中心螺旋桨的入流速度,提高了第二中心螺旋桨的效率,第二中心螺旋桨的尾流提高了第一中心螺旋桨的入流速度,提高了第一中心螺旋桨的效率,提高了轴流螺旋桨直升机的悬停效率,整机占用的空间小,能在狭窄空间飞行。


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    Title :

    Axial flow propeller helicopter


    Additional title:

    轴流螺旋桨直升机


    Contributors:
    JIANG FUYU (author)

    Publication date :

    2021-05-11


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B64C AEROPLANES , Flugzeuge



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