公开(公告)号：US3813186A

公开(公告)日：1974-05-28

申请号：US29588772

申请日：1972-10-10

Applicant: TEXTRON INC

Inventor： PALACHEK C ,  UNDERHILL W

IPC: B64C27/473 ,  B64C27/46 ,  B64C11/24 ,  B64C27/00

CPC classification number: B64C27/473 ,  Y10T428/24149

Abstract: Stiffness and shear resistance necessary for a helicopter rotor blade is provided by a first honeycomb cellular structure whose cells extend across the blade thickness and which structure spans at least that portion of the blade chord which includes the longitudinal boundary between a leading edge spar and a trailing edge skin section and a second honeycomb cellular structure joined to the trailing edge of the first structure of density less than the density of the first cellular structure. The front leading edge spar is joined to an upper trailing skin and a lower trailing skin which join at a trailing edge seam. The honeycomb sections are enclosed within the leading edge spar and a tapering chamber formed by the upper and lower skins.

Abstract translation: 直升机转子叶片所需的刚度和抗剪强度由第一蜂窝状结构提供，其细胞延伸穿过叶片厚度，并且该结构至少跨越叶片弦的部分，其包括前缘翼梁和后缘之间的纵向边界 边缘皮肤部分和第二蜂窝状细胞结构，其结合到第一结构的后缘，密度小于第一细胞结构的密度。 前部前缘翼梁连接到上部后缘皮肤和下部后缘皮肤，其连接在后缘接缝处。 蜂窝部分被封闭在前缘翼梁和由上下皮肤形成的锥形腔室中。