Re: [Paddlewise] Hull Speed isn't Wave Climbing

Gabriel L Romeu commented:

> With all this discussion on hull length, I am wondering why skeg design
> tends to opt for depth as opposed to increasing waterline length- kinda
> poking out the stern more on the surface?
> - --
> ¤   Gabriel L Romeu

To which Michael Daley replied:
> 
> Waves!  If you have depth forward of the stern, the skeg is more likely
> to stay in the water when you are going over waves.  At the stern, it would
> be lifted clear as your bow dives into a trough.  This is one of the drawbacks
> with rudders used to control weathercocking.
> 
> Mike
> 

While keeping a skeg or rudder in the water, or even partially in the
water, as a vessel pitches in waves is desirable, I think that the
relative low drag co-efficient of a high aspect foil (longer top to
bottom & narrower fore and aft) vs. the higher drag of a low aspect foil
(longer fore and aft & shorter top to bottom) may be more important when
a full range of paddling conditions is considered.  Also, because the
beam of a trailing rudder or skeg is so narrow and the buoyancy so
insignificant I doubt that it would effectively lengthen the water line
of a vessel.

Steve King
"Way too lazy to go to the book shelf and pull down all those books on
hydrodynamics"

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