Abstract: A lateral head restraint system providing support to a pilot's head during ejection or high-acceleration flight maneuvers. The lateral head restraint system includes inflating bladders positioned on opposite sides of a pilot's head. The bladders inflate from a compressed wedge position, sweeping through an arc on each side of the headrest structure. Inflation of the bladders centers the pilot's head into the correct control position and restricts lateral movement. When fully inflated, the bladders permit the pilot to lean forward or turn his head to either side. Further, an unobstructed field of vision is provided. The lateral head restraint system is incorporated into the ejection seat and remains fully operational during the ejection procedure to protect the pilot's head from injury.

Abstract: A device capable of flight comprising a frame including first and second leading edte members, a keel interconnected to the leading edge members, a first cross member attached to the keel and to the first leading edge member, and a second cross member attached to the keel. The second cross member is attached to the second leading edge member by a collar slidably mounted on the second cross member. A sail of flexible material is attached to the frame. The position of the collar along the second cross member can be adjusted to vary the billow of the sail.