AIRCRAFT WING Russian patent published in 2020 - IPC B64C3/10 

FIELD: aviation.

SUBSTANCE: invention relates to the aviation equipment. Wing of aircraft consisting of center section, cantilever and required functional systems is made with extension λ=7–11, narrowing η=3–4.5 and sweep to χ=35° and containing supercritical profiles. Wing is made up of four piece segments. Wing comprises front edge of wing, at top view straight and without an influx. Rear edge of wing is made with an influx and has four coordinates of fracture along wingspan. Relative thickness of profiles has the value of about 13–14 % in the side section and decreases to 8–9 % in the end section, monotonously decreasing in section from 40 % to its end. Wing is designed with positive swirling ε=2–2.5° in side section. End cross-sections are designed with negative swirling ε=-2…-3.6°. Act change of twist in span has practically linear decreasing character in range from 25 to 100 % of wingspan. Wing is formed by five basic sections, obtained by means of multi-stage optimization procedure, consisting of stage of initial choice of geometry, stage of solving inverse problem and stage of multi-mode optimization.

EFFECT: invention is aimed at providing cruising flight speeds of M_cr=0,84–0,9 while maintaining high aerodynamic quality and fuel efficiency.

1 cl, 6 dwg