Perry Mick wrote:

Aircraft spruce pn 03-40300, 3003-0 soft aluminum tubing, 3/16 od by .028
wall, good for 880 psi. So the ID would be .1315.

Length of one tube approx. 38" * pi = 120" or 10'
Internal volume is 1.63 cubic inch. Use about 30 tubes for 48.9 cubic inches
of water in the rad not including tanks.

Water weighs 62.4 lbs/cubic foot, or .43 lb/cubic inch. So the weight of the
water in the rad would be 21.2 lbs. I guess it's a little higher than I
thought.

So using squashed tubes would lower the weight of water and probably make
the heat transfer more effective.

Woops, made an error, corrected below:

Length of one tube approx. 38" * pi = 120" or 10'
Internal volume is 1.63 cubic inch. Use about 30 tubes for 48.9 cubic inches
of water in the rad not including tanks.

Water weighs 62.4 lbs/cubic foot, or .036 lb/cubic inch. So the weight of
the water in the rad would be 1.77 lbs.

Perry

You would probably want to furnace braze all the tubes to a flat sheet
of aluminum and then roll the whole works up into the ID of the duct.

Too much trouble and too expensive :)

Paul Lamar
 
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