[Joey]

I put two rocket engines, about the size F25/50 thing, on a 1:18 Corvette a few years ago. The ignition system was totally independent of the other circuitry, the whole deal was installed as a unit, and they both lit successfully on the first try. The car went about ten feet before the rockets gave out, and it probably didn't break 5mph. I don't know what kind of models those are engineered for, but rockets are typically a lighter than cars, and it showed in my experiment.

Despite the size difference, we lightened the Corvette, so it probably only weighed 50% more than an XMOD. And keep in mind, there were two rockets. But good luck! It'd be cool to see it work.