Group,

After over 11 years of building on a Glass Goose, I may be finished. Not
finished in a good way, though. I filled my wing tanks several months ago
and was delighted to fire up my Renesis. Today, a month later, I noticed the
leading edge cap separating from the wing near the wing root and leaking out
of it. With further investigation, I also discovered leaks on the bottom of
the opposite wing at the shear web. The residue of the leaks is yellow-tan
in color and sticky. My conclusion is that the alcohol in the gas has had an
adverse affect on the epoxy. I'll call the epoxy maker on Monday to get his
words. I read about the effects of alcohol on epoxy on the internet several
years ago but was assured that it wouldn't affect a tank that was Jeffcoed.
Sealing the tank is the least of my concern. What makes me think the wings
are now unreliable is that the fuel has wicked up into many areas of the
wings' integrity so, at this time, I don't think I can trust them. I offer
this as a warning to those that can use it. Do any of you have any ideas or
words that can help save this poor little airplane.

Sandy McNabb
Renesis in a Glass Goose (retired)


I am really sorry to hear that Sandy. I know how much time and effort you
put into your airplane. If you decide to fix it you could make a mold of the
existing wing skin to save some of the hand finishing.

Others with composite tanks in the works  consider putting in fuel bladders.
They will generally fit through a 6 by 12 oval opening.
Fuel bladders are widely used in aluminum certified aircraft.

If you build a new wing you mind find an off the shelf suitable fuel
bladder.

http://www.justgastanks.com/store/index.php?main_page=index&cPath=365


Paul Lamar

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Thanks, Paul. I don't yet know the damage to the airplane yet, but I'm very
concerned. I can't even imagine building two new wings.

Sandy


There may be a Goose project out there you can buy cheap. Lots of
projects are for sale right now. I know of at least one Goose project
in Lakeland. I forgot his name but perhaps I can dig it up.

Paul Lamar