FIELD: transport.
SUBSTANCE: invention relates to aircraft engineering. Proposed device comprises flap main element (5) to be extended and retracted relative the main wing and extending element (6A-1). Said element features smooth outline and is arranged nearby end part in direction of flap main element positive pressure surface to extend from the flap main element (5). Said wing comprises the main wing and lift increase device. Noise decrease device comprises the detachable main element to be jointed with end part in direction of the flap main element span and detached from said end part in direction of the main element span, and the extending element.
EFFECT: increased lift, decreased noise at the same weight.
6 cl, 40 dwg
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