The invention discloses a center variable-pitch propeller helicopter which is composed of four propellers, connecting lines of projections of rotating centers of three identical fixed pitch propellerson the horizontal plane form an equilateral triangle, and the three propellers are arranged on the left side, the right side and the rear side of a helicopter body respectively. The projection of therotating center of the other variable-pitch propeller on the horizontal plane is on the center of the equilateral triangle, the projection of the gravity center of the center variable-pitch propellerhelicopter on the horizontal plane is on the center of the equilateral triangle, and the rotating direction of the center propeller is opposite to that of the left propeller, the right propeller andthe tail propeller. Three identical engines are arranged to drive the left propeller, the right propeller and the tail propeller respectively, the other engine is arranged to drive the center propeller, the power of the engine driving the center propeller is larger than that of the engines driving the left propeller, the right propeller and the tail propeller, and due to the fact that the propeller pitch of the center propeller is variable, the propellers keeps high efficiency within a large speed range. The helicopter is suitable for occasions requiring high-speed flight.

    一种中心可变桨距螺旋桨直升机,由四个螺旋桨构成,其中三个完全相同的定距螺旋桨的旋转中心在水平面的投影的连线是等边三角形,这三个螺旋桨分别设置在机身的左边、右边和后边,另一个变距螺旋桨的旋转中心在水平面的投影在该等边三角形的中心上,中心可变桨距螺旋桨直升机的重心在水平面的投影在该等边三角形的中心上,中心螺旋桨与左边螺旋桨、右边螺旋桨和尾螺旋桨的转向相反,设置三个相同的发动机分别驱动左螺旋桨、右螺旋桨、尾螺旋桨,设置另一个发动机驱动中心螺旋桨,驱动中心螺旋桨的发动机的功率大于驱动左、右、尾螺旋桨的发动机的功率,因中心螺旋桨桨距可变,螺旋桨在较大的速度范围保持高效率,适合需要高速飞行的场合。


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    Title :

    Center variable-pitch propeller helicopter


    Additional title:

    中心可变桨距螺旋桨直升机


    Contributors:
    JIANG FUYU (author)

    Publication date :

    2021-01-12


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B64C AEROPLANES , Flugzeuge



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