There is no such thing as a GAS only RC!
They are all ELECTRIC!
Just some perfer to weigh the RC down with smokey, noisy, messy, air polluting, needs more batteries than electric gas motor. Maybe the extra weight gives more bite or something useful.
You can run an RC without GAS, but you can't run it without ELECTRIC!!!!!
Now I am going to go work on my GAS truck for the ROAR Nats in August!