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公开(公告)号:US4281966A
公开(公告)日:1981-08-04
申请号:US55096
申请日:1979-07-05
IPC分类号: B64C11/22 , B29D99/00 , B64C11/20 , B64C27/35 , B64C27/45 , B64C27/46 , B64C27/473 , B64C27/82 , B64C11/06 , B64C11/32
CPC分类号: B29D99/0025 , B64C11/20 , B64C27/45 , B64C27/82 , B64C2027/8254
摘要: A variable-pitch, multi-blade propeller specially usable as a rear rotor of a rotary-wing aircraft and a process for manufacturing the same are described. The propeller comprises a number of pairs of blades emanating from a central hub, each pair comprising a single elongate strip secured at its center to the hub. The strip is composed of two flat bundles of fibres and defining an aperture for a sliding shaft at their center. The shaft is used to control the pitch angles of the blades and aerodynamic blade shells are secured to the fibre bundles by adhesive synthetic cellular or foam material.
摘要翻译: 描述了一种特殊可用作旋翼飞机的后转子的可变螺距,多叶片螺旋桨及其制造方法。 螺旋桨包括从中心毂发出的多对叶片,每对叶片包括在其中心处固定到轮毂的单个细长条。 该条由两束扁平的纤维组成,并在其中心限定一个用于滑动轴的孔。 轴用于控制叶片的桨距角,并且空气动力学叶片壳通过粘合剂合成的细胞或泡沫材料固定到纤维束上。