"Heino & Deanne Weisberg" wrote in message ...
I have a Stitts SA-3A playboy I picked up recently. It has an A-75 Continental and a 67" Fottorp prop with a 47 pitch.
The plans indicate this machine should fly around 120 mph with this engine; no mention of prop. A previous owner I
spoke to said it cruised around 118mph for him. For me, it cruises around 95mph; I verified this with GPS. On run-up,
I get about 2250 max RPM. On take-off it easily red-lines, suggesting to me the prop is not a good match, but then I
know next to nothing about this. It flies beautifully, feels very well rigged. I won't pretend I know what the
problem could be; but I do know it is flying a lot slower than it should. Any suggestions would be greatly
appreciated!!
Thank you
Heino


Is it knots on the GPS?