PETETOTO Wikimedia Commons has media related to Cox engines. Cox throttle worked by restricting exhaust flow. Babe Bee type engine with "postage stamp" type Delrin backplate and brass needle valve instead of the integral Babe Bee fuel tank. These are all variations of the Baby Bee with different back-plates and other parts designed for different RTF aircraft, cars and boats. This engine came with the Spitfire RTF airplane. The most powerful cylinder piston combination without a doubt is the number 4 Tee Dee 049 cylinder.|At the end of one Minute