Bill,
I think I may have the invention you talk about, I am building a four hulled "catamaran" this has the advantage that if the boat is built longer and wider it does not really increase in weight too much i.e the hull weight is the same in a 16ft version as a 20ft version. Just the gap between the hulls get bigger.
My calculations indicate that a 16ft boat has 15% higher for and aft stability (pitching moment) than a conventional cat, because the volume is in the four corners.
It is designed to go on a car roof rack, and because of the way it folds it can be made almost any width without any trailer width restrictions.
See the link for a drawing of one of my designs.
http://www.fourhulls.com/xcatdrawing.pdfI would be interested to hear your thoughts on this design?
All the best
Gareth
www.fourhulls.com 
