Airfoil trailing flap
AssigneeEagle Aerospace Ltd.
InventorPercy J. Bobbitt
Life of this patent
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Abstract
Improvements in airfoils, such as conventional airfoils, are disclosed including modifications to the final flap element of the airfoil. Disclosed are surface contour modifications, including, in some instances, extensions of the chord of the final flap element, adding camber to the final flap element to enhance the performance of the airfoil by reducing its drag per lift, and providing greater lift for a given angle of attack.
Claims13
An improved trailing flap for a conventional airfoil, the improved trailing flap comprising a flap whose upper and lower trailing surfaces combine to provide substantial flap camber and an effective flap angle of at least five degrees, and whose trailing edge is displaced, by on the order of at least three tenths of one percent of the airfoil chord, relative to the plane defined by the lower surface of a prior conventional flap of the airfoil, thereby establishing a more evenly distributed lift over the airfoil chord and an increase in lift for a given angle of attack resulting in a reduction in drag per lift.
Dependencies are inferred from the claim text.