"cavelamb himself" wrote in message ...
Ernest Christley wrote:
wrote:

I'm going to get some 10% Ethanol Supreme and put one of my A/C quality fuel lines in it and let it soak.

It takes time. You might run several years without problems. My Deb
has bladder tanks (Neoprene impregnated canvas I believe) they would
not stand up. The tip tanks are bare fiberglass and resin. They too
dislike Alcohol.

However the big Continental needs 100 octane.


Jim Maher ran auto-gas in his rotary powered Dyke Delta. Cranked the engine once a month in the years that he was
finishing the rest of the plane. First flight went without a hitch. First few hours with no problem. The he lost
partial power in flight. Luckily near his home airport. He couldn't maintain altitude, but he had time. Took it
home safely.

On inspection, the fiberglass fuel tank flaked apart and crumpled like paper. I wasn't there. I haven't seen it.
But Jim isn't the sort to lie about these sort of things.

I believe he said he used Aeropoxy (though, don't hold me to that one).




Most epoxies will do that.

That's why vinyl ester is recommended for fuel tanks.

Some chemical resistance info he
http://www.epoxy.com/vester.htm

Lots more he
http://www.derakane.com/derakaneCont...comend ations




100°F is the max temperature recommended for the Derakane 470 with 'gasohol' 10-100% alcohol. Don't want to be sitting
out on the ramp in Arizona with thqat stuff in the tanks...although the 470 stuff seems to be the best in there product
line for this application.


WHere to get some:
http://www.aircraftspruce.com/catalo...vinylester.php