Dbryan

That is very good information. Have you used one of these engines on a plane? If you did how did it perform for you? I am really trying to see if it will be a good engine for my Great Planes Giant Stick or will it be to much engine. I am planning on using a MAS 18x6 or 18x6 prop. Scott told me it will spin a 18x6 prop at 8000 RPM. If that is so I wonder why more of these MAC 38cc engine are not being used.

Thanks