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1. 04:06 AM - Re: Tank Sealant (William Landucci)
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| Subject: | Re: Tank Sealant |
Just wanted to add that my Pulsar III with factory built wings
(completed 2003) also shows a slight expansion along the full perimeter
of the fuel cell (upper wing surface only) . On my plane this became
evident within six months after painting and has not progressed since.
No evidence of leaks. There has never been any ethanol in my tanks. Are
there any series III factory built wings without this joint visible? The
several I=99ve seen have it. Bill
> On Jun 13, 2017, at 12:26 PM, BARRY NORMAN <barrynorman@comcast.net>
wrote:
>
> I'm still having problems with tank seepage near the end plates where
is looks like the fuel is finding it's way out through very small
passageways in the fiberglass or connection points. I use PRO-SEAL FUEL
TANK SEALANT on the end plates and I think that works pretty well. I
believe the issue is, the epoxy used to glue the leading edge to the
spars at the factory was affected by ethanol in the fuel which caused it
to expand and crack all along the attachment point on the spar. You can
see the malformation on the outside of the wing where it was exposed to
the fuel and expanded. I believe fuel is traveling down these cracks and
creating small leaks. There is a product called PR-1005-L BUNA-N-SLOSH
COATING sold by aircraft spruce that I'm thinking about using to coat
the cracks in the epoxy at the attachment points. Has anyone used this
sealer and have information on it's effectiveness? I believe the
structural attachment of the leading edge to the spar is still very
sound but want to stop anymore expose to fuel if I can.
>
>
>
> I'm also finishing up an update to the panel which includes 2 GRT
Horizon HX displays and a new Stratus Mode S transponder that will make
the plane ADS-B compliant. Hope to have it all ready to go by reunion
time.
>
>
>
> Cheers,
>
> Barry Norman
>
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