But I don't know if that would count towards the speed record, G-80 motors can be obtained by anyone for $20 at [link=http://www.hobbylinc.com/htm/aro/aro78010.htm]Hobbylinc.com[/link] or other websites. That means anyone could mount one to an RC vehicle of any size above 1/12. you could use a little receiver like [link=http://www.dimensionengineering.com/PicoSwitch.htm]Picoswitch[/link] to ignite the rocket wirelessly, PicoSwitch is a relay switch that you toggle via hobby radio control gear. You can use PicoSwitch to quickly and easily control anything from a digital camera shutter to an electric squirt gun. It works great for igniting rocket engines, the rocket engines are ignited by a thin wire in the nozzle that heats up when electrical current passes through them.
[link=http://video.google.com/videoplay?docid=1897237134922446579&q=rocket+rc]Watch video of rocket rc car with 6 lb thrust rocket engine[/link] This car only has a black powder rocket engine and look how fast it goes, imagine an engine the same size but with 3 times the power and a thirty pound initial thrust!
[link=http://video.google.com/videoplay?docid=3429462816411819715&q=rocket+g80]G-80 in a rocket[/link] In this video the G-80 engine is launching a 10 lb rocket straight up to 30,000 feet at speeds of over 700 miles an hour, imagine what that engine could do in a Traxxas Jato.