AERODYNAMIC PROFILE Russian patent published in 2020 - IPC B64C3/14 

FIELD: aviation.

SUBSTANCE: invention relates to design of subsonic and transonic flight wings. Aerodynamic profile includes a nose part with a rounded front edge and a tail part with a trailing edge connected by upper and lower surfaces. Top surface has local maximum of absolute value of negative curvature, located in area from 0.92 to 1.0 of chord profile. Maximum of absolute value of negative curvature is selected in range from -3 to -7. Shape of lower surface of tail part is made with tangent line on trailing edge, which crosses tangential line to upper surface of profile on trailing edge at angle of 10–25°.

EFFECT: invention is aimed at reduction of aerodynamic resistance and increase of lifting force at cruise modes of flight.

3 cl, 6 dwg