Originally Posted by
Charley
Hi Hans,
I finally got a couple of sustained runs out of my GF-38. At full throttle with a 18X10X2 wood Zinger prop, the engine RPM was about 6,000. This with the open pipe and on 20:1 break in fuel, 91 octane, no alcohol. My test altitude is ~1700 feet MSL. Temp 80* F, H ~35%. I suspect the 18X10 is too much prop right now.
CR
Hello
Thanks for info.
But I think you need 95 octane fuel, and a 18X8 brake in prop.
In my german manual they say it;s better to mount engine on plane, when it runs stable fly with it, it's better for cooling and heat built up for cylinder head.
at the moment I fly my plane with 3 blade 18X10 Mejzlik prop, just need a long start run, but it flies great and landing are now out of the book ha ha.
maybe I try octane booster, just to get some more RPM during start? If I do I report about my findings.
keep us updated.
grts Hans