This one may interest some of us.


------ Forwarded Message
From: al p wick <alwick@juno.com>
Date: Wed, 9 Mar 2005 22:44:45 -0800
To: Cozy_Builders@mailman.qth.net
Subject: Re: COZY: fuel tank sealant???

Since I planned on using auto gas from day 1,  I put pieces of epoxy and
other fuel tank components in Mason jar. I then regularly replaced the
fuel in the jar with auto fuel. None of fuel tank components were
affected. 6 years later my plane was complete and the mason jar
components good as new. So I have operated for years using auto fuel
which often has ethanol and other undesirables. Others have done same
tests, same results.

However, I did install one of my fuel caps with the 50/50 epoxy you are
not supposed to use. It started getting mushy, so I removed it and used
20/80 epoxy. Happy as a clam.

-al wick
Artificial intelligence in cockpit, Cozy IV powered by stock Subaru 2.5
N9032U 200+ hours on engine/airframe from Portland, Oregon
Prop construct, Subaru install, Risk assessment, Glass panel design info:
http://www.maddyhome.com/canardpages/pages/alwick/index.html

On Wed, 09 Mar 2005 21:54:01 -0600 Jim Sower <canarder@frontiernet.net>
writes:
> I've heard that Autogas can be destructive to epoxy (I know alcohol
> is
> bad, but have heard rumors to the effect that even without alcohol,
> some
> epoxys are vulnerable).  I've further heard that Jeffcoat (sp?) is
> NOT
> subject to damage from autogas.  The "mogas damages epoxy" statement
> was
> not accompanied by any reliable documentation or compelling
> evidence.  
> The Jeffcoat statement seems to have been based on anecdotal
> evidence.
>
> Does anybody have solid information around this? ... Jim S.