FIELD: aviation.
SUBSTANCE: profile includes upper convex AVMS and lower ANEDC circuits connected to front and rear edges, coordinates of which are defined relative to AC profile chord. Concave part NED of lower circuit follows the curvature of AVM upper contour. Curve of lower circuit has front N and rear D inflection points. Front point has rounding radius R. Point of maximum curvature B in upper circuit is located on one vertical line with the upper point E of lower circuit maximum curvature. Top contour on side of rear edge has concavity M to make MS profile tail.
EFFECT: higher lift of lifting propeller blade.
1 cl, 3 dwg
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