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Date: Mon, 6 Apr 2009 07:36:54 -0700 (PDT)
From: James Maher <delta11xd@att.net>
Reply-To: delta11xd@att.net
Subject: Re: [FlyRotary] MGS Epoxy and Ethanol
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
In-Reply-To: <list-3570880@logan.com>
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--0-2009340090-1239028614=:1917
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John,
Sorry to hear about your fuel tank problems.
A couple of years ago I experienced similar issues with=A0the fuel tank in =
my Dyke Delta
which was constructed from Aeropoxy epoxy and fiberglass.
While the primary layups seemed to hold up better, the secondary bonds, lik=
e where
the baffles and sump were bonded into the tank were the first to dissolve.
The way that I found out was during=A0my 4th flight, were I lost engine pow=
er
due to a very lean mixture, caused by a mostly clogged fuel filter.
I was lucky enough to be able to throttle back and=A0limp home at 50% power=
.
When I began to trouble shoot the problem I found a clear gelatinous substa=
nce in the gascolator and fuel filter.
The reason I am telling you this is to be sure that you know the side effec=
ts of a deteriorating fuel tank.
You are fortunate to have found the problem on the ground and not while fly=
ing.
Be sure to replace or clean all fuel filters and flush the system to remove=
 all
possibility of residual debris.
You should probably also check the apex seals to be sure that they have not=
 got gummed up with epoxy from your tank.
Finding a material that is impervious to the effects of ethanol is very dif=
ficult.
I finally decided on reconstructing my tank from vinyl ester as it seems to=
 be the
best material with regards to ethanol.
I've got test coupons in mogas for about a year now and so far so good.
I wish you success with the repair.
Please keep us up to date on you progress.
=A0
Jim
=A0


--- On Sun, 4/5/09, John Slade <sladerj@sbcglobal.net> wrote:

From: John Slade <sladerj@sbcglobal.net>
Subject: [FlyRotary] MGS Epoxy and Ethanol
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Date: Sunday, April 5, 2009, 9:33 PM

Just in case anyone is thinking that fuel tanks made with MGS epoxy will st=
and
up to prolonged auto-gas / ethanol exposure, I'm here to tell you that they
won't.

I'm in the process of removing and replacing the inner skins in both fuel
tanks on my Cozy IV.

See http://forum.canardaviation.com/showthread.php?t=3D4594 for a detailed =
report
and pictures. I'll post more pictures on my web site when the repair job is
complete.

Chris Barber - we need to buy each other a beer :)
John

--
Homepage:  http://www.flyrotary.com/
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--0-2009340090-1239028614=:1917
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<table cellspacing=3D"0" cellpadding=3D"0" border=3D"0" ><tr><td valign=3D"=
top" style=3D"font: inherit;"><DIV>John,</DIV>
<DIV>Sorry to hear about your fuel tank problems.</DIV>
<DIV>A couple of years ago I experienced similar issues with&nbsp;the fuel =
tank in my Dyke Delta</DIV>
<DIV>which was constructed from Aeropoxy epoxy and fiberglass.</DIV>
<DIV>While the primary layups seemed to hold up better, the secondary bonds=
, like where</DIV>
<DIV>the baffles and sump were bonded into the tank were the first to disso=
lve.</DIV>
<DIV>The way that I found out was during&nbsp;my 4th flight, were I lost en=
gine power</DIV>
<DIV>due to a very lean mixture, caused by a mostly clogged fuel filter.</D=
IV>
<DIV>I was lucky enough to be able to throttle back and&nbsp;limp home at 5=
0% power.</DIV>
<DIV>When I began to trouble shoot the problem I found a clear gelatinous s=
ubstance in the gascolator and fuel filter.</DIV>
<DIV>The reason I am telling you this is to be sure that you know the side =
effects of a deteriorating fuel tank.</DIV>
<DIV>You are fortunate to have found the problem on the ground and not whil=
e flying.</DIV>
<DIV>Be sure to replace or clean all fuel filters and flush the system to r=
emove all</DIV>
<DIV>possibility of residual debris.</DIV>
<DIV>You should probably also check the apex seals to be sure that they hav=
e not got gummed up with epoxy from your tank.</DIV>
<DIV>Finding a material that is impervious to the effects of ethanol is ver=
y difficult.</DIV>
<DIV>I finally decided on reconstructing my tank from vinyl ester as it see=
ms to be the</DIV>
<DIV>best material with regards to ethanol.</DIV>
<DIV>I've got test coupons in mogas for about a year now and so far so good=
.</DIV>
<DIV>I wish you success with the repair.</DIV>
<DIV>Please keep us up to date on you progress.</DIV>
<DIV>&nbsp;</DIV>
<DIV>Jim</DIV>
<DIV>&nbsp;</DIV>
<DIV><BR><BR>--- On <B>Sun, 4/5/09, John Slade <I>&lt;sladerj@sbcglobal.net=
&gt;</I></B> wrote:<BR></DIV>
<BLOCKQUOTE style=3D"PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: rgb(=
16,16,255) 2px solid">From: John Slade &lt;sladerj@sbcglobal.net&gt;<BR>Sub=
ject: [FlyRotary] MGS Epoxy and Ethanol<BR>To: "Rotary motors in aircraft" =
&lt;flyrotary@lancaironline.net&gt;<BR>Date: Sunday, April 5, 2009, 9:33 PM=
<BR><BR><PRE>Just in case anyone is thinking that fuel tanks made with MGS =
epoxy will stand
up to prolonged auto-gas / ethanol exposure, I'm here to tell you that they
won't.

I'm in the process of removing and replacing the inner skins in both fuel
tanks on my Cozy IV.

See http://forum.canardaviation.com/showthread.php?t=3D4594 for a detailed =
report
and pictures. I'll post more pictures on my web site when the repair job is
complete.

Chris Barber - we need to buy each other a beer :)
John

--
Homepage:  http://www.flyrotary.com/
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</PRE></BLOCKQUOTE></td></tr></table>
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