How many cubic inches of surfboard foam does it take to float 1 pound?
Float on sea water or fresh water?
Surfboard foam density is 2.2 # per cubic foot, or 0.00127# per cubic inch
Fresh water density is 62.4 # per cubic foot, or 0.036 # per cubic inch
Sea water density is about 64 # per cubic foot or 0.037 # per cubic inch
0.0370 – 0.00127 = 0.03573 # buoyancy per cubic inch of water displaced
1/0.03573 = 27.99 cubic inches
Let’s say you need 28 cubic inches of surfboard foam to float 1 pound in sea water.
Bill
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