I put a little Stihl 20cc on my brother's Big Stik and it flew great. (We set it up on Gas/Glow) I think it would look a little better with the engine inverted, but he wanted it upright.

I think the 24cc would fly something like an 80" Giant Stik. It wouldn't have a big excess of power, but it should fly ok. The whole "power option" had soared upwards on models nowadays. What we considered sufficient 20 years ago would be considered way underpowered today. But it sure is fun to have all that power!!

AV8TOR