Abstract: An airfoil modification device that helps maintain airstream attachment to either upper or lower airfoil surfaces, the device in the form of a plurality of spaced, low profile rods arranged generally end-to-end and attached to the airfoil and generally normal to the airstream to define a serrated edge that induces multi-directional airstream turbulence.

Abstract: A thin, high performance swept wing of the tapered type with an improved leading edge characterized by a first portion that extends from near the wing root at a fixed radius to a transition point where twice the fixed radius does not exceed about 100.6 percent of wing thickness at about 5 percent of the local chord at the transition point, and a second leading edge portion extending from the transition point to the wing tip that has a radius expressed in percent of local chord which does not exceed that percent of local chord at the transition point. Winglets are optionally provided in combination with the wing with improved leading edge to provide in combination, improved aircraft performance.