Thanks for the info Mark. this all came about because I have an "ultralight" buddy who used in his "legal Eagle" airplane he built. I didn't know for sure how it would really stand up. around here all our car gas has 10% alcohol in it from Oct to April for "smog" reasons (like it really helps) and he has had his airplane for two years now. perhaps he's not telling me the whole story because I suspect he has sloshing sealer in it also as he had a few leaks to start with that he said he fixed. Notwithstanding, I haven't actually looked inside his tank either.
we can by Vinyl ester here locally from the DuPont paint store, but I think I am going with Mark Jones's aluminum for reliability, plus I can't imagine them being any heavier than glassed tank. Fred Johnson Reno, NV Langford wrote: Maybe the question should not be whether polyester is useable for a gasoline tank, but which one works "best". I suppose if a guy wanted to save a few bucks by buying polyester at Walmart as opposed to vinylester from somewhere like Aircraft Spruce that's his tradeoff to make, but if you're doing it for weight savings, I think you're using the wrong reason...
