Re: [Paddlewise] paddlefloat photo

From: Robert Livingston & Pam Martin <bearboat2_at_attbi.com>
Date: Sun, 23 Dec 2001 02:59:47 -0800
> This can provide additional bouyancy to prevent sinking, but it will not
> contribute
> to stability.  The water on the outside of the hull doesn't know what's inside
> the
> hull.  Adding a sponson to the _outside_ of a hull can make a difference.

Speaking of what water "knows".

If you have a sponson on the outside of a hull how does the water "know"
that it is not the outside of the hull itself?

Say you "glue" that sponson to the outside of the hull. How does the water
know that this is a sponson on the outside of the hull rather than just a
bulge in the contour of the hull.

What if you are paddling a Klepper like the old one that I used to have that
used an air-bag to tighten the skin and this air bag ran around the hull
like a sponson. What does the water think of this? That air bag was "inside"
the hull.

--------------------

The reason the water "knows" about the built in sponson is that as the
partially flooded boat starts to tip the water is restrained from going to
the edge of the outside hull "within" the boat. The otherwise freely mobile
water is constrained to stay in the center of the boat because the edges are
full of air.


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Received on Sun Dec 23 2001 - 08:44:58 PST

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