You can probably make a little bigger tank in composite, I have made 2 using
wet lay-up over a foam plug, ((one with plastic cover material for
buildings) and one I put gasoline in the foam and scraped the gunk out) no
foam sandwich in the walls, and a couple bulkheads in the tank, and a large
sump with drain and outlet for the fuel line.

Used 3-4 layers of 300-400 gram fibre glass, the epoxy is about the same
amount as the glass.

Jan
"Fortunat1" skrev i meddelandet ...
Bryan Martin
sednews:BE693745.3CE41%bryanmmartinNOSPAM@comcast. net:

You probably won't save any weight with a fiberglass tank. Homemade
fiberglass lay-ups tend to be a lot heavier than aluminum for the
equivalent strength. The big advantage of fiberglass isn't weight,
it's the ability to easily form it into complex shapes.

OK, thanks. I wasn't actually thinking of a layup, but a foam core
construction made of foam sheet coverd in two layers of glass cloth each
side amd made up into box. Looks like it should be light enough, but I
can't tell how much epoxy i'm going ot need. The tank would be about 23 Sq
feet in surface area, one side, of course, si double it and add a bit for
baffles and I need to glass and epoxy about 50 sq. feet of 1/4 inch foam.
any notion how much epoxy is needed? I've only ever done little patching
jobs with epoxy