The Dayton-Wright RB-1 (Rinehart-Bauman model one), also known simply as the Dayton-Wright Racer was a racing aircraft developed in the United States to participate in the 1920 Gordon Bennett Cup air race. Advanced for its day, the aircraft was a high-wing monoplane with a monocoque fuselage and cantilever wing (built of solid balsa wood covered in plywood and linen that incorporated a Grant designed mechanism to vary its camber in flight by moving the leading edge and trailing edge. The aircraft also featured a retractable undercarriage operated by a hand-crank making it one of the first instances of undercarriage retraction for aerodynamic benefit alone. The propeller shaft was mounted through a large oval radiator, the pilot had no forward view, but was provided with flexible celluloid