RE: Phoenix Sukhoi SU-31 Engine choice
I had a ys 63 four stroke in it and it flew well. Another fella had a magnum 61 FS and it did not have the same pep. I would think somthing like a 52 magnum 2 stroke would work well. It is a relativly hot plane on landing, not a screamer but you had better have had your coffee in the morning.
Lost mine to a ham operator that was shooting us down, FCC finally got em after years of problems.