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.
-----------------------------------------From: "Kayak via KRnet"
To: "KRnet"
Cc: "Kayak"
Sent: Sunday February 2 2020 2:54:42PM
Subject: Re: KR> Auto fuel compatibility
Interesting experience. I think some tank materials would resist that.
Before I get to the tank part of my project I'd like to incorporate
the
most fuel-indestructible tanks short of metal. (I have Diehl skins to
use)
Also wonder then what that absorbed moisture does to other
performances of
the fuel such as vapor lock, fuel efficiency, and octane?
On Sun, Feb 2, 2020 at 1:52 PM Sidney wood via KRnet
wrote:
> The alcohol in auto fuel dissolved the West System epoxy resin in
my KR-2
> fuel tanks in the outer wings; started to leak minutes before the
first
> flight. I replaced the fiberglass with welded aluminum tanks. No
further
> problems with fuel.
> I later discovered that alcohol with 6 percent water makes an
excellent
> solvent for cured epoxy. The water would come from humidity in the
air
> mixing with the alcohol in the vented fuel tanks.
>
> Sid Wood
> Tri-gear KR-2 N6242
> California, MD, USA
>
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