RE: Engine for Funtana X50
9757, I have not tried a KE loop with mine. It will however knife edge at 1/2 power all day long. It is at a very high AOL. Almost like a harrier style KE. I only run a 4" pitch prop. Maybe with a higher pitch on the prop it would do a normal knife edge? It could also be a CG thing. Your CG is more than likely tamer than mine. I can slide my battery pack back and forth but fly at 6" most of the time.
David