Poll : Best "High-Performance" Fun-Fly Engines
LeeU:
You said:
Rossi 50 R67/ 15.52 oz/ 2.2 hp@18000 rpm's/ .1739 hp/oz
I think you'd better try the ol calculator once again. I get .1417 hp/oz. Still the best P/W ratio, but not bu much margin at all, and comparing manuf numbers to your numbers.
It would be interesting to see the popular Webra 32 in this list as well, with stock muffler and with Mousse-can ultralight pipe.