Hi Randy,
I didn't get a Rossi 61, I purchased a Rossi 40 engine. Rossi claims it will run stunt in a low rpm, well I guess I'll see if its true. It must be a strong engine at 17000 rpm's it produces 1.9 hp. I think I'll try the engine in a score, should be okay with that kinda horse power? After I bench run her, might help me decide which plane she'll carry?? I couldn't resist for a hundred dollars I thought it be worth trying, just having fun, Gary (I believe the 40 weighs around 13.7 ounces)