This Royer model airplane engine was manufactured by Royer Motors, Pasadena, CA, 1932. The engine is 7”-long and 7”-high. The engine has a .785 cu. in. displacement and consists of a sand cast crankcase, front cover and spoke-fin head. It has side port induction with a large poppet valve type carburetor, cast exhaust pipe, timer assembly and a polished aluminum propeller that is keyed to the shaft. It was designed to burn gas or methanol on spark ignition and has a red enameled tank attached to the rear head screw.