Abstract: The stowable airfoil structure is a tapered, high aspect ratio, retractable and foldable wing for aircraft which provides minimum aerodynamic drag during launch and minimum space for ground storage. The airfoil utilizes a forward leading edge box section to which is attached a plurality of spanwise channels hinged together for movement in a chordwise direction. Retraction of these elements takes place by the utilization of suitable actuators so as to move the hinged elements forwardly in a nested position thereby substantially reducing the width of the wing or airfoil which is then folded to lie along side the fuselage of an aircraft.

Abstract: A bullet including the lead body in combination with a rotary aerodynamic brake. The brake is non-operative over a specified distance after firing so as not to degrade the bullet's lethal effectiveness. However, upon reaching the distance limit the brake operates to quickly reduce the speed and to stop the bullet so that it is no longer lethal.