Patent
Leading edge flap
Varnell L James,Eugene G Hill +1 more
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TLDR
In this article, a leading edge flap is actuated by compact linkage which allows room for auxiliary equipment in the leading edge portion of the wing forward of the forwardmost main spar, and a bullnose is pivotally mounted on rigid structure forming a part of the flap.Abstract:
An aircraft wing incorporates a leading edge flap which is retractable into an opening provided in the bottom surface of the wing. The flap is actuated by compact linkage which allows room for auxiliary equipment in the leading edge portion of the wing forward of the forwardmost main spar. The flap includes a surface panel having a rigid rear section which when retracted into the wing forms a part of the bottom airfoil surface of the wing and a flexible central section which when extended is curved to form a portion of the flap airfoil surface and when retracted is partially straightened out to conform to the contour of the bottom airfoil surface of the wing. A bullnose is pivotally mounted on rigid structure forming a part of the flap. When the flap is extended, the bullnose forms a downward and rearward extension of the flap airfoil surface. Upon retraction of the flap, the bullnose is folded inwardly to a tucked position above the flap and inside the wing. A link, interconnecting the bullnose and the central section of the flap surface panel, causes the central section to flex between its extended position and its retracted position responsive to movement of the bullnose.read more
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References
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Patent
Methods and high lift systems for making an aircraft wing more efficient for takeoffs and landings
TL;DR: In this paper, a highly efficient aircraft wing is formed by drooping the leading edge portion and extending a leading edge flap for takeoff, and by extending a multiplicity of leading edge flaps for landing.
Patent
High lift leading edge device
TL;DR: In this paper, an extension and retraction mechanism for the retractable leading edge wing flaps is proposed to produce a variable camber to the flap panel and likewise to the wing airfoil section.
Patent
Leading edge flap mechanism
TL;DR: In this article, an aircraft airfoil leading edge flap mechanism utilizing a pivotally mounted forming rib in combination with a portion of the skin having resilient characteristics was proposed for landings and take-offs.