Join Date: Jul 2000
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Re: Is there a formula for determing wetted surface area?
For a 'fat assed' boat: (1/2 X length of Waterline X 1/2 of beam squared X 3.14) + (2 X average length X depth of keel) = 1/2 surface area of approx. cone + keel surface area
For a canoe body: (.4 X length of waterline X 1/2 of beam squared X 3.14) + ( 2 X average length X depth of keel)