[MHml] Pitching

[Jesse Deupree]

tony amador wrote:
>
>I have always wondered how pitching can be minimized for cats when going up
>wind in chop.  And for that matter, when motoring against chop.
>Has any one used foils  (or fins) on rudders to reduce pitching?  Or for
>that matter in any other position on the hulls.   Small motor boats use them
>on there outboards, mostly for trimming to get on a plane, etc. but also to
>reduce pitching and of course the ships use them  as stabilizers.
>
>Are there other ways or reducing pitching?  Water ballast, etc?
>
>Seems like when the chop picks up pitching is what is slowing us down.

The International 14 and the Moth (mono) classes are beginning to see 
boats with wings on the rudders. They attempt to actually fan the 
boat forward when pitching is occurring in light air. Trade-off is 
increased drag downwind and at speed. The Moth in particular has seen 
boats that fly on foils. Both these classes are open development 
classes.

There have been attempts to create rudder wings with adjustable attack.

The two ways I identify multihulls from a distance is the lack of 
heeling and the faster and more pronounced pitching. I think it is a 
big deal.

Jesse Deupree
F-27 ION
Portland Maine