I just flew mine with an old OS 45 MAX with an 11x6 prop. To everyones surprise the plane flew very well. Could use more power but it just looks great and sounds even better screaming at full throttle. It's not so fast that you're constantly turning, making long banked passes, it's very convincing. The landing gear has become a problem too, looks like I'll have to get inside to reinforce the block and get rid of the nasty play.