Is there any evidence that motor gas will affect the fibre-glass fuel
tanks

++++++++++++++++++++++

I would be very happy to see a comprehensive answer to this question.

I recall when Safe-T-poxy first came out - word was that it was bullet
proof for auto or avgas fuel tanks.  Not sure how many tanks were built
with this epoxy, but a few years later the story changed.   New word was
that it could be dissolved by some fuels.  At least one unscheduled
landing resulted from a gummed up pickup.

More recently the word is that a potential alcohol content (methanol?)
in some car fuel may cause problems.  In southern Africa we have been
exposed to fuels (Auto) of various alcohol content for maybe 25 years
now, so we understand this snag.

I remember reading about a "slosh compound" for the Pipers with metal
tanks - a liquid that could be applied in the field, to form a fuel
proof skin on the inside of the tank.  The idea was probably to cure
Cherokee's et al with weeping or leaking fuel tanks, but this may be the
answer to isolating the epoxy tank from the fuel.  It is a certified
(approved) product for the purpose of sealing aircraft fuel tanks.

Maybe a manufacturer /supplier should provide us with the poop - no big
deal if brand X is not suitable for fuel tanks - just better that we
know.

Steve J




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