Abstract: An airplane construction is described in which the flight characteristics of the airplane, are radically changed from hypersonic capable to short take off and landing (STOL) capable by the approximate ninety degree (90) rotation of a new component of the airplane, referred to as a body spar, which function is to maintain structural integrity of the airplane and maintain the required alignment of such elements as the fixed wings, thrust providers, control surfaces and landing gear, regardless of the mode of flight of the airplane.The single largest component of the airplane, referred to as the wing/fuselage component, is so shaped as to be a high aspect ratio, highly cambered, (STOL) wing when the airplane is configured for subsonic/STOL flight, that is when this wing/fuselage is positioned at an approximate right angle to the body spar.