Thanks for all the good info Dean! What we are really looking for is the "Rossi .60" of electric motors. I'm no engineer, but I'm aware that elecs have different torque characteristics than 2-stroke glow motors. Thus the comments about higher pitch props seem to make sense. Like many of us, I'm sort of addicted to the scream of piped .60's, but I just got back from a warbird weekend with my newly-electric-powered P-51. I'll have to admit, there is a lure to the clean, quiet power.
Prior to the conversion, I flew the plane with an OS .61 FS with Slim Line muffler. Being around 9 lbs, with 760 sq in of wing, it flew much like a pattern ship with out the pipe. With the elec setup, it really flies about the same. Trouble is, it depends on a 15-16 in dia prop - not very compatible with a ballistic, trike gear pattern ship. I'm half tempted to try the P7 with the setup mentioned above! I'm all for retro, but.......you can't stand in the same river twice. Maybe it's time for more blending of old and new!

Dewey Newbold