I ve banged my boat around for 2 years, hauling it over rocks, mussel shoals, and gravel. They re indestructible. If you have 1/2 use it. It s no big deal.Message 1 of 10 , May 12, 2009View SourceI've banged my boat around for 2 years, hauling it over rocks, mussel shoals, and gravel. They're indestructible. If you have 1/2" use it. It's no big deal. Over-analyzing this problem instead of building the boat is a mistake.
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05/12/2009 06:06 PMPlease respond to
Airolite_Boats@yahoogroups.comccSubject [Airolite_Boats] Re: Bottom Stringer Twist?
--- In Airolite_Boats@yahoogroups.com, "petroglyph@..." <petroglyph@...> wrote:
>by Peter a week or so ago, it looks like his stem is thicker than the Montfort-prescribed 3/8" (which I thought was pretty thin.) Is it 1/2"? 3/4"? I am reading other plans for skin-on-frame boats, and combining some ideas. Others make their stems thicker.
> Thanks, Kurt.
> Here's another question: Studying the close-up photo kindly posted
>Out of my experience base here - but that usually doesn't stop me from expressing an opinion ;)
I didn't have access to 3/8 ply - so I used 1/2". I wouldn't have hesitated to use 3/8 though. It's been a while since my structures courses in engineering school, but I'd suspect that loads initiated at the stems are almost fully transferred to the stringers and gunwales (with the ribs transferring stringer loads to adjacent stringers). For this reason, I'm making fairly robust fillets at each stem joint - as I'd guess that these joints are the critical load path.
As I said - I'm halfway through my first boat and I'm coming off like a full-fledged naval architect. So I'll be quiet now and let the guys that actually know what they're talking about have a whack at your question.