[MHml] Sven Yrvind's cat ideas

[Tom Speer]

It's an intriguing idea - right the hulls, not the boat.  Derek Kersall 
had a cat design with hulls that pivoted about a longitudinal axis, but 
he did it for the purpose of folding the boat for trailering, and the 
huls only moved 90 degrees.  Doing it for capsize recovery has real 
promise.  Recovering the rig after a capsize could be tricky.

I'm less enthusiastic about the business of moving the masts back and 
forth along the crossbeams, and of moving the hulls like a pantograph.  
I think these are too many gimicks to work out at full scale, without a 
lot of potential benefit for the boat.  For example, cat's don't suffer 
from big changes in weather helm for a lot of reasons - the lack of heel 
angle, and the natural shift forward in the center of lateral resistance 
as the lee hull is loaded that helps to counter the offset drag - being 
a couple of them. 

If Sven can work out one idea well, it will be significant advance.

Cheers,

Tom Speer

Martin Schöön wrote:

>Instructions:
>1) Go to http://www.yrvind.com/
>2) Click on "present project"
>3) Read
>4) Discuss :-)
>