Originally Posted by
1967brutus
As far as I have been able to determine, the difference between groundruns and flying does not affect the shape of the curve. It might highlight a lean spot (making it more noticable) but it is not like suddenly midrange has to be noticably difference. Most of the times, if you have a good curve on the ground, one click richer on the HS needle shifts the entire mixture range to where it needs to be for flight.
Good to know, thanks.
Originally Posted by
1967brutus
Dang! You have beaten me at my own game! Never thought of that (and therefore never consciously tried that) but that principle immediately landed in my mind and clicked in place. I think you have a very good groundrule there.
Looking back I think that is where I usually ended up, but I think it is a pretty good way to check whether you're on the right track with the needle setting.
On the right track, yes, but safer to be on the rich side of that -/+ hysteresis centerline.
The thought of adjusting needles for a centered hysteresis came to me with the introduction of the temp/pressure sensor. I felt it was important that the change in fuel mixture would have equal effect, whether richer or leaner, with temp and pressure change.
I seriously could be over thinking things.