The only thing about using a two stroke RC motor is that they have a habit of stalling, at least in my RC car anyway. What sometimes happens is air gets in to the fuel pipe (as the fuel sloshes around in the tank) and the engine stops.

Unless an electric starter, glow starter and maybe a slip clutch is used the engine could stall on the disc€™s first hit and then your out of the comp because your weapon in immobilised.

But I do like the initial idea though, just need to iron out those bugs.