> Here's what I'd like to see a concensus on, fill in the blanks: A
> production composite boat's materials have a design failure strength of
> _____ psi. A typical 6oz / 1/4" strip / 6oz layup has a failure of
> ____ psi. 4oz / 4oz / 1/4" strips / 4oz has a failure strength of ___
> psi. Ditto for working strength. I dont know the answers. Any takers?

Gudgeon brothers did this a few years ago. Copies of it were posted here. The results were as you would expect, heavier layups of cloth being stronger then thinner layups. Nick may still have copies of this information around (and probably will not charge you for providing it). At the worse, contact West systems for a copy of it. In fact, they probably have it on their web page.