On Wed, 28 Dec 2005 18:51:08 GMT, "Thomas Wentworth"
wrote:

Two things ... when building a hull, do you first need a backbone,,,
keel,,, or whatever??

Not necessarily since there are many different ways of building a
boat, but building a backbone and frame/mold is certainly a time
honored method.


Another ,,, if you use plywood, can you glass over the ply and the ply
becomes a core?

You can but you end up with a relatively heavy boat by modern
standards.