Lots posted on this already but I can't seem to figure this out.
I'm still in Phase 1 testing so no long cross country's yet so most of my flights have been short.
My indicated fuel remaining (Dynon calculated) has always been less than my Fuel Level. However, three flights ago, my fuel flow went to 10 gal/hr and I got an alert.
Post landing inspection found no leaks.
I increased the K-Factor up to 90000 from the default of 68000. The Dynon calculation of fuel-use-ratio indicated it should be set at 222,000. I figured that couldn't be right so I set it at 90000 just to see the effect.
The next flight, the fuel flow stayed lower but upon post flight the difference between Fuel Remaining and Fuel Level was still significant; 4.1 gal versus 2.3 gal for a 1 hour flight. The new ratio K-Factor worked out to be 160,434.
Fuel pressure has been steady between 5 and 4 PSI. Although keep in mind these were short flights with many throttle changes (e.g. pattern work)
So, what could be wrong? 160,343 seems to indicate something more here than a K-Factor adjustment given the recommended starting point is 68000.
I'm still in Phase 1 testing so no long cross country's yet so most of my flights have been short.
My indicated fuel remaining (Dynon calculated) has always been less than my Fuel Level. However, three flights ago, my fuel flow went to 10 gal/hr and I got an alert.
Post landing inspection found no leaks.
I increased the K-Factor up to 90000 from the default of 68000. The Dynon calculation of fuel-use-ratio indicated it should be set at 222,000. I figured that couldn't be right so I set it at 90000 just to see the effect.
The next flight, the fuel flow stayed lower but upon post flight the difference between Fuel Remaining and Fuel Level was still significant; 4.1 gal versus 2.3 gal for a 1 hour flight. The new ratio K-Factor worked out to be 160,434.
Fuel pressure has been steady between 5 and 4 PSI. Although keep in mind these were short flights with many throttle changes (e.g. pattern work)
So, what could be wrong? 160,343 seems to indicate something more here than a K-Factor adjustment given the recommended starting point is 68000.