Mike Spera wrote in message ...
One well known aviation university teaches you to "fly out on the tank
you flew in on". The theory being that takeoff is not the time to "test"
whether a tank you just switched to is blocked, the fuel valve
malfunctioned, a tank is empty (cuz you forgot to check it), a tank you
just switched to is full of water, etc.

Pretty poor theory. It's a haphazardway of avoiding actually managing
your fuel. I'm more of a measure, calculate type of guy myself. I keep
a log of the tanks in flight in my Mooney (I don't have a "both"
selector).
I also don't buy into the "fill the tanks before take off" B.S. You
should know how much fuel you need and how much extra you'll need. I
just don't see putting 8 hours of fuel in my Mooney and pushing around
like an over stuffed whale.
All this reminds me of the Bonanza pilot who declared a fuel emergency
only to discover he had another 3 hours of fuel. He always put 5 hours
in it, but never let it go below 2 hours, he burned 12gal/hr but
caluclated it as 15 gal/hr, etc, etc. All this "extra safety buffer"
just meant he had NO idea how much fuel he had.


-Robert, CFI