On Fri, 3 Dec 2010 13:13:53 +0000, terryjohnson
wrote:


I am considering to cast myself a planing boat out of marine grade
concrete - I know they use it for sailboats with displacement hulls, but
would it work for a light boat, too?

Very doubtful. Even on displacement sailboats ferro-cement ends up
being too heavy unless the boat is well into the 40 to 50 foot range.
There are other issues as well, not the least of which is the
inability to get insurance.