abstract:The Budweiser Rocket was an American 3-wheeled land vehicle, generally resembling the 1970-era Blue Flame land speed record holding vehicle in appearance, powered by a hybrid liquid and solid-fuel rocket engine that has been claimed as being the first vehicle to have broken the sound barrier on land, driven by Stan Barrett and designed and built by William Fredrick. Neither the Fédération Internationale de Motocyclisme nor the Fédération Internationale de l'Automobile, the official speed record certifying bodies, recognise the record attempt, the speed purported to have been reached or that the vehicle ever attained supersonic speeds.