In rec.aviation.piloting Jose wrote:
BTW, Beech sez I've got 20 gallon tanks, with 17.5 usable. After running
my right tank dry, I can put fill with 20.8 gallons. [...]

Fortunately, what Beech put in my owners book were written by engineers
with an engineers fudge factor. [...] Way lotta slop there.

"Usable" means usable in EVERY flight attitude. The "unusable" fuel can
be used in SOME flight attitudes, obviously some of that unusable fuel
could be used in the specific flight attitude in which you were at the time.

True, but so what?

Did you notice I was putting 20.8 gallons in what is supposed to be a 20
gallon tank? My point is that POH are not completely accurate in regards
to fuel managment, and that you don't know how inaccurate they are for
YOUR particular plane until you run a tank dry.


--
Frank Stutzman
Bonanza N494B "Hula Girl"
Hood River, OR