Wetted area calculator?

Seagreen

Seagreen

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I'm trying to work out the approximate surface area of my hull below the waterline. is there a "rough ready reckoner" technique available (for a long, straight keeled hull) or should I just bang the offsets into a free ship design program? Have I just answered my own question?

;)
 
I would hazard a very rough guess that if you measure the hull girth from keel to waterline amidships, and multiply it by the WL length, and then allow a coefficient of say 0.7, then that might give you a rough idea (for the area of one side of the hull).

Is this to calculate the quantity of antifouling paint to buy?
 
Something like that. I'm actually fed up with the lack of ability of any antifoul I buy to consistently do "what it says on the tin" so I was going to price up copper sheet and see how much money and weight the process would take. An old friend had copper sheet put on the hull of his boat, (both his and mine being AWBs) and has had no problems and a smooth slippy passage through the water... Except when first launched, he didn't check his anode, ad his prop disintegrated in 3 months, which was funny considering. Sheet copper should last about 25 years, which will see me out.
 
Seagreen said:
I'm trying to work out the approximate surface area of my hull below the waterline. is there a "rough ready reckoner" technique available (for a long, straight keeled hull) or should I just bang the offsets into a free ship design program? Have I just answered my own question?

;)
Click to expand...

Measure half girths and then use simpsons multiplier this should get you close, cost of copper is a bit prohibitive for this these days though.........
 
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