ARRANGEMENT FOR ATTACHMENT OF PROPELLER BLADE Russian patent published in 1997 - IPC

FIELD: aircraft technique. SUBSTANCE: invention relates to arrangements for attaching wood propeller blades, chiefly those for propeller-driven sleighs and motorized hang-gliders and consists in that attachment point of wood blade ensures adjusting a wide-range pitch up to revolution to 180 deg and converting the pulling propeller into a pushing one. This is achieved by that bottom part of blade, which is screwed in into conical opening of casing through screw thread of thrust profile with broad intercoil fields, is provided with diametrically arranged screw perpendicular to planes of the packet of plates of propeller blade. Casing is connected to sleeve of the screw bushing through a thread connection and cylindrical part, which is embraced with split clamp with ear and bolt. EFFECT: improved performance characteristics. 2 dwg