BLADE OF AERODYNAMIC MODEL OF AIRSCREW AND METHOD OF ITS FABRICATION Russian patent published in 2015 - IPC G01M9/08 B64C11/26 

FIELD: aircraft engineering.

SUBSTANCE: blade comprises regular part of constant weight and geometrical shape and various replaceable end elements. Adapter pins, minor part of the spar, joint point and connector are arranged at blade regular part. Blade root regular part comprises the following elements. Leading multiple section strap, spar of preset stiffness and weight, top and bottom skin, filler of leading part, filler of trailing part, counter flutter weights, end rib with micro switch, electric conductors, connector and weights provoking the flutter. Replaceable end elements represent a structure composed of top and bottom skin, fastening holes for connection with said adapter pins, LEDs, electric conductors, connector, counter flutter weight and light filler. Proposed method consists in the following. Firs, blade root regular part is made with obligatory precise measurement of extending parts, say, adapter pins and spar end part. Results of measurements are used in making of seats in multiple replaceable end elements differing in weight, side, shape and centering. Now, regular parts are assembled with the help of split screw joint.

EFFECT: various aerodynamic characteristics obtained on the basis of one blade, higher reliability, accelerated testing.

10 cl, 14 dwg