TILTING WING BLADE Russian patent published in 1994 - IPC

FIELD: aircraft engineering. SUBSTANCE: blade airfoil is filled with lower and upper thin-walled trihedral rods 5 and 6 respectively glued between each other and with a shell forming a frame structure in the blade cross section. A spider made in the form of the blade airfoil is parted by slots into several trihedral inserts 20 connected to a tubular base. The upper and lower shells of the blades cover the wave surface of the spider, thin-walled trihedrals 5 and 6 are put through slots on inserts 20 where their side walls are deformed through the surface of inclined holes and clamped by fixing nails 26. The shell, upper and lower faces of the trihedrals are clamped through the wave surface of the spider by straps by a bolt or a rivet tie. A cantilever axle parallel to the axis of the tubular aft rod is provided on the tubular base, the rod is fastened in fuselage bearings for rotation at an angle of 30. A slot for moving the cantilever axle along an arc of 30 is provided in the fuselage shell. EFFECT: improved stiffness, reduced weight, simplified structure and reduced structure cost. 3 cl, 16 dwg