Thanks again for all the suggestions, guys. I guess I'll have to experiment with the various prop/pipe length combos to see what I really like. It did come with the Tru Turn spinner. The airplane is a taildragger and a 13" prop will just clear the ground when the tail raises. Do I have to retract the gear during a contest? I guess I could put bigger tires on to help with the ground clearance. It would also make it easier to operate from our grass club field. But of course, there is the drag penalty.

Also, I usually run OS #8 plugs, but some of your suggestions refer to other plugs. Are there more suitable plugs for this engine?

Is 10,000 RPM a minimum acceptable number givien the prop suggestions so far?

Bryan