Chevy, let's get it straight. As RCIGN1 states, a person can run a glow engine on gasoline, with the right oil mix and an ignition system. The ignition system adds to the weight of the power package.

But notice what Wings-RCU says above : Less power. True. With alcohol for fuel, you can pack (allow me to round off roughly) about four times as much in that combustion chamber as gasoline, and still have enough air in there to burn all the fuel. Since alcohol has (rounding off a lot, again) about half the energy content of gasoline, the alcohol powered engine will have something like twice the power of the same engine on gasoline. Consider the weight of the ignition system, you get a power to weight ratio roughly twice that of the gasoline powered engine.

So, if you're thinking you can add an ignition system and run gasoline for fuel, and fly your same plane with the same power... sorry, it will have maybe half the power.

Now, if you add a timed spark ignition to your glow engine, and use glow fuel... maybe some power advantage there... maybe not enough to maintain the power to weight ratio, but it would create more power.

Good luck,
Dave Olson