Conceived by automotive inventor Charles F. "Boss" Kettering and built by the Dayton-Wright Airplane Company, the Bug drew upon the genius of an extraordinary team. Orville Wright served as aeronautical consultant, while Elmer Sperry — whose gyroscopic stabilizers had already transformed naval gunnery — devised the guidance system. A young Henry H. "Hap" Arnold, future architect of the U.S. Army Air Forces, oversaw the Army's interests. The Bug launched from a four-wheeled dolly running down a portable track, much as the Wright Brothers had done fifteen years earlier at Kitty Hawk. Once airborne, a pneumatic gyroscope and aneroid barometer maintained heading and altitude, while a mechanical counter measured engine revolutions. When the preset distance was reached, the engine shut off, the wings folded, and the 180-pound warhead plunged toward its target.