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 Boat Design Forums What exactly is square foot

#1
04-11-2005, 07:09 PM
 Yolinda K. Junior Member Join Date: Apr 2005 Rep: 10 Posts: 1 Location: US
What exactly is square foot

Im trying to figure out the square footage of a boat hull. What is the method one uses to calculate this by hand??

Formula, steps. all would be appreciated

Yolinda
#2
04-11-2005, 08:24 PM
 cyclops Senior Member Join Date: Feb 2005 Rep: 38 Posts: 1,059 Location: usa
Are you trying to calculate the hull surface SF. Or maximum SF of the boat when viewed from the stern. Or some other surface? Or a combination of surfaces? Due to some very curvy areas it is a very difficult task that is dependant on hull shape. Hand calculation is a approximate answer at best.
#3
04-11-2005, 08:33 PM
 cyclops Senior Member Join Date: Feb 2005 Rep: 38 Posts: 1,059 Location: usa
Short of cutting pieces of paper and taping them on the hull I have no idea of the accuracy by the non-use of some exotic cad cam tracer program.
#4
04-11-2005, 08:38 PM
 cyclops Senior Member Join Date: Feb 2005 Rep: 38 Posts: 1,059 Location: usa
I gave my old slide rule away years ago. That was a real hand job calculator. I have a few hulls that could keep some one busy.
#5
04-11-2005, 11:23 PM
 jehardiman Senior Member Join Date: Aug 2004 Rep: 1909 Posts: 1,754 Location: Port Orchard, Washington, USA
Google "Simpson's rules", About half a hundred ways to get exactly what you want. If you really want to get cool use one of Tchebycheff's rules.
#6
04-13-2005, 12:14 AM
 PAR Yacht Designer/Builder Join Date: Nov 2003 Rep: 3465 Posts: 11,668 Location: Eustis, FL
Trapezoidal method or Simpson's if intrested in pain. Plainmeter or software if not.
#7
04-13-2005, 02:23 AM
 dionysis Senior Member Join Date: Jan 2003 Rep: 44 Posts: 257 Location: Tasmania, Australia
This forum has an informative thread. Just search this forum for

"wetted surface area - approximate formula"
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