Abstract: A split-flap wing assembly having a wing with a flap frame, a flap having a lateral pivot axis, and one, two or more flap sweep members having a forward end attached at a hinge in a forward end of the flap frame of the wing, and a rearward end attached pivotally to a flap hinge of the flap along the lateral pivot axis. The flap sweep members are pivotable at the forward end from a neutral sweep position within the flap frame, to a deployment angle at which the rearward end of the flap sweep members are farther away from the wing's camber line, to form a slot between the flap frame and a forward edge of the flap that allows airflow from along the lower surface of the wing to flow through the slot and to the interior surface of the flap.

Abstract: A split-flap wing assembly having a wing with a flap frame, a flap having a lateral pivot axis, and one, two or more flap sweep members having a forward end attached at a hinge in a forward end of the flap frame of the wing, and a rearward end attached pivotally to a flap hinge of the flap along the lateral pivot axis. The flap sweep members are pivotable at the forward end from a neutral sweep position within the flap frame, to a deployment angle at which the rearward end of the flap sweep members are farther away from the wing's camber line, to form a slot between the flap frame and a forward edge of the flap that allows airflow from along the lower surface of the wing to flow through the slot and to the interior surface of the flap.

Abstract: An airfoil assembly comprising an airplane wing, a spoiler, and a flap for unmanned and high endurance aircraft. The spoiler is located on an upper surface of the airplane wing while the flap is located on a lower surface of the airplane wing. The spoiler and the flap can occupy at least one-third, and up to three-quarters, the chord span of the airplane wing. The spoiler and the flap are both capable of moving upwards and downwards with respect to the airplane wing through their respective frames.

Abstract: An airfoil assembly comprising an airplane wing, a spoiler, and a flap for unmanned and high endurance aircraft. The spoiler is located on an upper surface of the airplane wing while the flap is located on a lower surface of the airplane wing. The spoiler and the flap can occupy at least one-third, and up to three-quarters, the chord span of the airplane wing. The spoiler and the flap are both capable of moving upwards and downwards with respect to the airplane wing through their respective frames.