Four identical fixed pitch propellers with horizontal rotating surfaces are arranged on the front portion, the rear portion, the left portion and the right portion of a helicopter body, the connecting line of the rotating centers of the four fixed pitch propellers is a square or a rectangle, and the projection of the center of the square or the rectangle on the horizontal plane is on the gravity center of the helicopter body. The rotation directions of the adjacent fixed-pitch propellers are opposite, the rotation directions of the opposite-angle fixed-pitch propellers are the same, an upper middle fixed-pitch propeller is arranged above the gravity center of the top of the fuselage, and a lower middle fixed-pitch thrust propeller is arranged below the gravity center of the bottom of the fuselage; the upper-middle fixed-pitch propeller and the lower-middle fixed-pitch thrust propeller are the same in size and provide most lift force, the projection of the rotating center of the upper-middle fixed-pitch propeller and the projection of the rotating center of the lower-middle fixed-pitch thrust propeller on the horizontal plane are overlapped with the gravity center, a four-point type L-shaped undercarriage is arranged below the aircraft arms, or a tail thrust propeller is arranged at the tail of the aircraft arms. The unmanned aerial vehicle is applied to the fields of transportation, aerial photography, agriculture and the like.
一种中部反转多螺旋桨直升机,在机身前后左右设置四个相同的旋转面水平的定距螺旋桨,这四个定距螺旋桨的旋转中心的连线是正方形或长方形,正方形或长方形的中心在水平面的投影在机身的重心上,四个定距螺旋桨中,相邻的定距螺旋桨的旋转方向相反,对角的定距螺旋桨的旋转方向相同,机身顶部重心的上边设置上中部定距螺旋桨,机身底部重心的下边设置下中部定距推力螺旋桨,上中部定距螺旋桨和下中部定距推力螺旋桨尺寸相同并提供大部分的升力,上中部定距螺旋桨和下中部定距推力螺旋桨的旋转中心在水平面的投影与重心重叠,机臂下设置四点式L形起落架,或在尾部设置尾推力螺旋桨,具有结构紧凑,载重量大的优点,应用于运输、航拍、农业等领域。
Multi-propeller helicopter with reverse middle part
中部反转多螺旋桨直升机
2022-06-03
Patent
Elektronische Ressource
Chinesisch
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