Dale,
I have this engine on an H9 1/4 CAP. This is honostly too much engine for this plane. Why do I say this.........? For normal flight, I B E A R L Y have the throttle cracked. Then of course for the 3D stuff I am really working the throttle. I guess the biggest problem is that for this plane and the props that are available, the plane is either too fast when I open the throttle or it just really isn't running in it's "sweet spot" for normal flight. If I could only find a 22 X 5 or 6 prop!!!! I do have to say though that when it is time to do the 3D stuff, W O W!!!!

Jeff