John Shaffer wrote:

> My experience has been that the alcohol in automotive gasoline, will
> dissolve the Vinyl Ester resin I used in my fuel tanks, in my KR -2.

I used Derakane Momentum 411-350 (the vinyl ester that Aircraft Spruce
sells) to build N56ML's fuel tanks, and never have seen any indication
that they are weakened, and I've run several thousand gallons of
autofuel with ethanol through them over the years.  It may be that some
fuel laden with "outlier" chemicals in it (like what wrecked Jeff's Cub
tanks) is what really did your tank in.  Vinyl ester was supposedly
designed to contain auto fuel with ethanol in it.  I learned my lesson
from my Swift.  I poured some "no-name" ethanol free fuel in it a few
years ago.  I should have known better....it had a not-so-subtle funky
smell to it.  I came back to the hangar a week later and was greeted by
the funky smell at the door.  Both 1.5" fuel tank hoses (that connect
the wing tanks to the main sump in the fuselage) had been dissolved to
the point that all of the fuel in both tanks had leaked out on the floor
and evaporated, leaving nothing but the funk!  Fortunately, none of that
crap made it to the pumps or the carb, or I'd have had a bigger mess on
my hands....

Mark Langford, Huntsville, AL
ML "at" N56ML.com
www.N56ML.com



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