Subject: [harryproa] Free pivoting ww hull
From: Gardner Pomper
Date: 3/7/2010, 12:20 PM
To: harryproa@yahoogroups.com.au
Reply-to:
harryproa@yahoogroups.com.au

 

The single crossbeam idea seems like it has to deal with torsional forces when the ww hull tries to move independently of the lw hull. With only a 2' width on the crossbeam, one would think that dealing with these stresses might be difficult. 


I am sure it is doable, but it does make me wonder about just having a circular crossbeam (at least where it joins the ww hull) and a sleeve, like on the mast, and allow the ww hull to pivot independently of the lw hull. I know rob had a hand in building a boat like that once, but I have been unable to find a write up of what the advantages/disadvantages were. Can someone point me to an article?

I guess my main concern would be if the ww hull buried itself in a steep wave and pivoted right over, end over end, and the ww hull ended up capsized, even though the lw hull didn't. Is that a realistic concern?

- Gardner

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