Cox Models, a former division of Estes Industries of Penrose, Colorado, was a multimillion-dollar hobby company, is one of the hobby industry's oldest companies and is noted for its production of miniature model internal-combustion engines.
This company, originally named The L. M. Cox Manufacturing Co, Inc., was founded in 1945 by the machinist Roy Cox in Placentia, California. Cox grew up in and around his father's bicycle shop, and he developed an interest in mechanical devices. Cox's first products were wooden pop guns, produced in his home garage. Cox chose wood for his basic material, since metal was scarce during WW II.
When metals became readily available in the United States in 1947, Cox turned his attention to new products, beginning with a diecast metal car. This product was developed into a "whip car", a tethered vehicle which could be manually swung in a circle at high speed. Nitro- and gasoline-powered tether cars with .60 cubic inch miniature engines capable of speeds of 100 mph (160 km/h) were quickly becoming popular. Cox's first contribution to that growing hobby was a cast aluminum midget racer powered by a .15 engine by Cameron Brothers.