Hi Radil,

If you go to the website www.rcfaq.com, and then click on "engine conversions" on the left side, you will find a lot of basic helpful information.

You will want to take off all unnecessary parts, and cut or grind off any unnecessary metal to make it as light as possible. A battery powered ignition system conversion will be lighter than the original magneto ignition, but you can run it either way.

If you can find out the manufacturer of your engine, there might be a kit available with all the parts necessary to convert it for airplane use, such as a propellor adapter, etc.

Hope this helps,
AV8TOR