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

FIELD: aeronautical engineering.

SUBSTANCE: proposed wing is formed as integral spatial system on base of rear spar at zero sweep and integral base profile which is modified in span in such way that root profile is mounted at angle of plus 1.0-1.5 degrees ensuring maximum of magnitudes Mk* and Mzo at moderate magnitudes Cy_max and tip profile is mounted at angle of minus 1.5-2 degrees ensuring maximum magnitude Cy_max. Profiles have maximum negative concavity f=0.15-0.2 in tail sections of profile whose position changes in span from X=0.6 for root profile to X=0.9 for tip profile. Wing thickness ratio changes from 0.16 to 0.13.

EFFECT: enhanced lift and speed qualities.

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