Join Date: Oct 2009
Location: Gloucester, MA
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Re: CAD drawings...
To do a proper stability test, you would need pretty close to full drawings or models which I doubt exist. At some point, there were drawings for the boat but they would not have been made in CAD, they would have been done by a draftsman. The reason that you need pretty accurate drawings is that the center of mass is very important just like the center of buoyancy.
If you just want the exterior hull shape, it is not that hard to take a lines drawing, import it as a jpeg, define points, define surfaces and make a model of the hull. I did this a number of years ago for my boat in Solidworks just for fun. If you can't find the lines drawing, you can take the lines off of the boat.
You can also do a stability test by moving mass around on the boat. This does not account for the changes in the center of buoyancy as the deck edge goes underwater. You could get the center of mass of the boat this way to make your model behave accurately though.