Some Cessna 140's came equipped with a MAP gauge, so those pilots can also use it to some extent to set mixture and power with reference to RPM.
Carl,
Hope this doesn't sound like one of those "how come you don't know that" sort of a question, but how do you use the manifold pressure gauge to set mixture. I've used an EGT and RPM to find mixture setting, but never a M.P.G. - is it the same sort of thing, wait for a drop and push back a little??
Please explain....
Cheers
