STRAIGHT HIGH-SPEED WING Russian patent published in 2008 - IPC B64C3/10 

FIELD: aeronautical engineering.

SUBSTANCE: proposed straight high-speed wing is made at aspect ratio λ=9-11 and taper ratio η=3.5-4.2. Wing is formed as integral spatial system on base of straight wing having zero sweep by rear spar and leading-edge wing extension with integral base profile; profiles from root one to tip one have maximum negative concavity f=0.015-0.02 in tail sections of profile at position in span changing from X=0.5 for root profile to X=0.9 for tip profile. Wing thickness ratio ranges from 0.165 to 0.13. Profile twist angles φ_i change from +1.5 to -1.5 degrees according to linear law; angles of inclination of upper surface at trailing edge is δ£6-7 degrees.

EFFECT: enhanced lift and speed qualities; reduction of mass; increase of wing net volume.

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