It's not a "nitro" engine.
It's called GLOW fuel.
Nitro is a term used by car guys, because it sounds cool and there is a lot of slick marketing hype in RC cars.
Our small planes run on glow fuel. It is about 17--20% oil. Has anywhere from 0%---30% nitromethane. The rest of it is alcohol (methanol). It's called glow fuel because the plug glows red hot during the combustion process. It's basically a diesel engine. Once it is running, you take the nicad battery off (ignitor) and the engine compresses the fuel against a red hot platinum element. That makes the fuel ignite.
Glow Trainer. [sm=thumbs_up.gif]
Not nitro trainer.
