duncan_rtfm

Questions:

I have built the first rough prototype of the gas tank out of 3mm MDF held together with masking tape, and it fits!  Ta-Daaa!  Well, it's a bit snug, to be honest, so today I'm going to cut prototype #2 out of 9mm MDF, and screw it together.  If that is OK, I'll commit to 9mm ply.

Question #1:  What hardware do I need to include?  I've been to the marine supply stores (online) and there are so many filler caps, it's hard to choose.  I will have a transparent tube on the outside of the fuselage to show fuel depth, but what about fuel pumps?  Is it as simple as fitting a pipe and running it to an external pump (there's plenty of space behind the engine)

Question #2: What do I seal the tank with?  I've seen videos online of a guy building a fuel tank for his boat, and he seals the inside with epoxy (West).  However, I've also read that I need to use vinyl ester resin.  The problem with vinyl ester is that (apparently) it doesn't bind well to vinyl ester.  My plan is to cut the individual sheets, glass the inside surfaces, wait for them to cure, clean up the edges, and then bond/screw all sides together, and apply a fillet.  Thoughts?

Regards,

Duncan