On Sat, 02 Apr 2011 16:27:47 -0500, Tim Wescott
wrote:

Recently I've taken to making fuel tanks for model airplanes out of old
Dole pineapple cans (because they're tinned on both sides). The
construction is fairly simple: you make a tube, usually pentagonal,
that's the main body of the fuel tank. Then you make end caps for the
tube, you poke a few holes for the brass fuel lines, then you solder
everything up.

As an alternative: Would Coke cans work? You can sand blast the
printing off of Coke cans with baking soda. I would think a small sand
blaster using canned air (like you spray out your computer keyboard
with) should be relatively easy to make. Cut the Coke cans to size.
And then TIG weld the two halves together. Probably would work best
with a backing ring (also cut from the Coke can) for the weld. TIG on
the fittings.

The aluminum construction would be less weight in an RC airplane.
Dave