Well, I plan to build another Ringmaster Deluxe. The first plane, even thought it had a ridiculously long tail moment in an ineffective attempt to balance the too heavy engine in the nose, still came out pretty nose heavy necessitating almost 3oz of tail weight. I want to avoid that in this next iteration. So I thought of using a PA 40UL on a pipe. The difference in weight from the 40VF I used in the last one (at some 12oz) versus the PA at about 8.5oz seemed the bright way to go. then I realized that although I've used the PA for several planes, I've never run it on a pipe.

So, what's the best pipe setup for this engine. Which pipe? what pipe length? What sort of RPM setting? What prop will be the most likely to work?

Thanks for info.