FLYING VEHICLE WING SPAR Russian patent published in 1994 - IPC

FIELD: aircraft manufacture. SUBSTANCE: wing spar of flying vehicle has shank with trailing edge piece provided with alternating projections and recesses, framework 6 made of laminated composite material with loops 7 made of woven reinforcing material and supporting plates received by loops. Loops 7 of framework 6 have rectilinear caps 8 and are secured by these caps together with plates 9 in recesses of shank by means of threaded rods 11 and circular layers 12 of linen weave cloth with its warp located at angle of 30 to 60 deg relative to axis of symmetry. Layers of framework with loops are made from fabric on base of high-modulus fibers with threads of warp located along framework and threads of weft located in its transverse direction at volume ratio of warp and weft fibers from (10: 1) to (8: 1). EFFECT: enhanced reliability and reduced mass of spar. 4 dwg