51960Re: water ballast vs lead, iron, etc
- Dec 1, 2006Ouch! You caught me being vague and sloppy in my language. When one
chine goes down, the other one comes up. But in my defense, the
center of the bottom does "lift" up.
I developed this insight when I was building Michalak's 4'x12' Piccup
Pram. I saw these 4'x8' Styrofoam slabs (maybe 3" thick) in a home
improvement store and wondered how one would behave if it rested
(empty) on water. By my stiffness formula, the empty slab would be
very stiff, but only at very, very, small angle. Once the bottom
lifted above the water, a slight breeze would flip it over.
A typical Advanced Sharpie might resemble this slab. When I first
started looking at boat hulls on the internet, I was surprized by the
--- In firstname.lastname@example.org, "graeme19121984" <graeme19121984@...>
> I'm missing something here. How can the boat lift in static
> conditions when the mass is unchanged. "Lift" defined by displacing
> less water. How is the boat made lighter?
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