(a) You can go through the math all day long and still not explain why I
have drained the (hangared) 182 after a particularly humid day or two and
get a tablespoon or two of water in the quick drains.

(b) You cannot explain why "drain the sumps" is a daily check list event for
both fuel trucks AND airplanes.

(c) You cannot explain why CessBeePipMoo all have drains at the low point of
the fueling system. It would be a hell of a lot cheaper not to have to put
them in there. Somebody somewhere thought it was a good idea.

(d) You cannot explain why a hangared 150 from this airport fifteen years
ago dumped it into a pasture off the end of the runway and then proceeded to
drain two QUARTS (yes, that's quarts) of water from the tanks.

Jim


"Dan Luke" wrote in message
...

"RST Engineering" wrote:

I would ten times over risk gas theft over water condensation overnight in
half-full or nearly empty tanks.

There's not enough water in 20 gallons of air to matter.

How much water is there? In *extremely* wet conditions (saturated air at
20 deg. C) there are only 14.7 g/kg of water in the air. A cubic foot of
air at SLP weighs about 34 grams at 20 C. 10 gallons is ~27 cu. ft., so
that gives about 900 g. of air and about 14 g. of water. Not a problem.

--
Dan
C172RG at BFM