A good while back, I got 2 Leo 37s from Joe Just that Scott Riese converted to C/L stunt engines.
I used one today the first time on a built up wing RD-1. The engine preformed flawlessly! Used an APC 10 1/2 X 4 1/2 prop and it ran a beautiful high rpm 4-2. Came on and off lke clockwork. Plenty of guts, no problem hauling the RD-1 all over the sky. Even though they are reported to actually be 34 size, it is plenty strong.
Bill <><