Zippi

I fly a VF Edge with a Super Tigre.90. It is a superb match. Balances right on spec out of the box, huge verticle performance. I use a Master Airscrew Simitar 13X6 at right about 10K rpm which is just slightly on the rich side. I found in this range the MAZ a better prop for this combo than an APC of the same size. Larger diameter and less pitch seem to hurt velocity and authority coming out of maneuvers. Not a 3D plane. No snappiness in the Edge at all. A real floater on landing. I had the same engine package in the VF 58 inch Extra and no snapiness there either. I aggree with all of you, VF's planes do not need alot of elevator throw. I found the small Extra did need high rate elevator though to flair enough. You may find some negative Expo very helpful on the elevator to calm things down on landing.

A note on cowling. My ST .90 fit completely in the Edge so I did the remote glo thing. The Edge has alot of exhaust area at the bottom of the cowling. But I did run into overheating issues. I went ahead and cut the cylinder head opening and even though it is 1/4 inch below the cowling the overheat went away.

Just my thoughts on powering VF's with over 1.0 2 cycle, I don't think you will find a way to use it. The planes are pretty fast and get their performance much from speed. they are not the 3D hover planes with big fat wings that are so commonplace. As you will see, in the air they are very nimble. I'm a big believer that more power solves lots of things, but originally these were .60 powered planes. A .90 2 cycle really is overpowering them, but they really do perform well at that power range. I don't fly 4 cylces so I can't speak to their power ranges.