A synchronous reversing four-propeller helicopter is composed of four same variable pitch propellers, the projection of the connecting line of the rotating centers of the variable pitch propellers onthe horizontal plane is square or rectangular, and the gravity center of a helicopter body is overlapped with the projection of the center of the square or rectangular on the horizontal plane. Projections of rotating surfaces of two diagonal variable-pitch propellers in the four variable-pitch propellers on the horizontal plane are not overlapped, projections of rotating surfaces of two adjacent variable-pitch propellers on the horizontal plane are partially overlapped, and an initial mounting angle of two adjacent blades of the two adjacent variable-pitch propellers is half of an included angle of the blades of the variable-pitch propellers; the rotating directions of the two diagonal variable-pitch propellers in the four variable-pitch propellers are the same, the rotating directions ofthe two adjacent variable-pitch propellers are opposite, and the two adjacent variable-pitch propellers synchronously rotate reversely. Due to the fact that the variable-pitch propellers are partiallyoverlapped, occupied space is saved, the weight of the aircraft is reduced, and the aircraft has the advantage of being large in load capacity and suitable for long-time flight.
一种同步反转四螺旋桨直升机,由四个相同的变距螺旋桨构成,这些变距螺旋桨的旋转中心的连线在水平面的投影是正方形或者是长方形,机身的重心和该正方形或者是长方形的中心在水平面的投影重叠,四个变距螺旋桨中对角的两个变距螺旋桨的旋转面在水平面的投影不重叠,相邻的两个变距螺旋桨的旋转面在水平面的投影部分重叠,设置相邻的两个变距螺旋桨的相邻两个桨叶的初始安装角是变距螺旋桨的桨叶的夹角的一半,四个变距螺旋桨中对角的两个变距螺旋桨的旋转方向相同,相邻的两个变距螺旋桨的旋转方向相反,邻的两个变距螺旋桨同步反转。由于变距螺旋桨部分重叠,节省了占用空间,减少了空机的重量,具有载重量大的优点,适合长时间飞行。
Synchronous reversing four-propeller helicopter
同步反转四螺旋桨直升机
2021-03-02
Patent
Elektronische Ressource
Chinesisch
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