Originally Posted by
doxilia
Robert,
thanks - much appreciated. Were you burning about 1.6 oz/min or more than that?
The Speed/13 on an "un-tuned" stock NR pipe setup is clocking 13,500 on 10% Omega fuel (3 oz castor added) - APC 11x7. I figure that once tuned, on 15% fuel it could turn another 1000. So the difference between a modern RE 61 and SE 65 is about 500 rpm. Amazingly, the NR will turn on the same un-tuned 10% setup 14,500 on a Rev-Up 11x7.50 and 14,955 on a Rev-Up 11x7.25!
Lower inertial prop mass I suppose despite the slightly higher pitches...
These are my figures but others have done better; mostly on tuned setups though.
David
Wait till you tune the pipe! The NR will not disappoint.
I was burning about 17 oz. in 9 minutes, so more like 1.88 oz/minute.
Wood props typically show a lower pitch on the pitch gauge, especially as you progress toward the root, whereas the APC props are true across the blade. That may account for the higher RPM readings.
-Robert