RE: Norvel's A6R AME .061 R/C vs similar sized engine
I have both engines, and I like them both a lot. I think that it depends on your intended use.
I had a Norvel .074 in a TT Scooter, and it was way too much engine for the plane. Throttling back the engine didn't produce satisfactory results. The Scooter is a lazy flyer and doesn't need much power. I took the Norvel out and put the GP-07 in.
I'm only saying that if you need the power, get the Norvel. If you are flying a lightly loaded plane that just wants to bore holes in the sky, get the GP-07.
Just my $.02
Bob