Interesting, Virg

If you
really want to use water for leak tests, after draining all out that
will, pour in a bottle of alcohol.  That will absorb the retained water.
Slosh and drain the alcohol, then pour in a quantity of ethyl ether
which will pick up the retained alcohol.  After draining this, any
liquid will quickly evaporate, leaving a clean, dry tank.  Any possible
damage will be negligible because of the short contact time.  Water is
not soluble in ether, which is why the alcohol step.  What little water
is in the alcohol will get picked up by the ether as long as the
percentage isn't too high.  No worries about acetone, diesel, or
gasoline.
You're welcome
Shannon

The Aircraft Rotary Engine Newsletter.              Powered by Linux.

http://home.earthlink.net/~rotaryeng/            http://www.linux.org