AFAIK, all "fuel flow" gauges in light aircraft read pressure, although they
are calibrated as flow meters. Good symptom of a clogged injector is high
fuel flow...not exactly intuitive.

Now when you get to Shadin and their equivalents, you are looking at
honest-to-goodness fuel flow. Again, AFAIK.

Bob Gardner

"CVBreard" wrote in message
...


Is the fuel flowmeter in the newer Cessna 172s (and others?) a true flow
meter
(as in a small turbine meter generating pulses, etc.), or is it a pressure
gauge or pressure transmitter measuring the fuel pressure in (whatever)?

I got the you-know-what scared out of me while in flight and this *&^#@
thing
read ZERO, though everything else (RPM, EGT) was normal. It was OK before
take-off. It finally came off zero, but read low.

Hmmm?