"Larry Dighera" wrote:
A Piper PA28-235 can have 84 gallons of fuel in 4 tanks, so leaving
them half empty, for instance in a humid maritime environment,
overnight where the temperature drops sufficiently to cause the
moisture to condense out of the 40 gallons of air contained in them,
will result in enough water in the fuel system to interfere with
operation of the aircraft's power plant.

How much water is there in 40 gallons of air, Larry? Assume that when
the airplane was parked, the temperature was 20 C and the air was
saturated (which would be extremely wet conditions, BTW).
--
Dan
C172RG at BFM