AERODYNAMIC PROFILE OF THE LIFTING ELEMENT OF THE AIRCRAFT Russian patent published in 2022 - IPC B64C27/467 B64C11/18 

FIELD: aircraft engineering.

SUBSTANCE: invention relates to the field of aviation, in particular to the profile of the rotor blade of an aircraft, and more specifically to the profile of the end part of the blade. The NCV-3 aerodynamic profile of the carrier element of the aircraft contains the contours of the upper and lower surfaces. The thickness of the profile is determined as a percentage by the ratio of the maximum thickness of the profile to the chord and ranges from 8 to 15%. The aerodynamic profile of the rotor blade of an aircraft includes the upper and lower contours formed by convex curves and their intersection points with specified coordinates relative to the chord of the profile. The coordinates of the convex curves are counted from the midline of the profile, while the upper coordinate is added and the lower one is subtracted.

EFFECT: acceptable bearing capacity, low profile resistance, higher quality, stable focus position when changing the Mach numbers are provided.

3 cl, 4 dwg, 1 tbl