DSK wrote in message

amazingly well. If the chop increases and flow in both air and water
gets turbulent, they loose their efficiency and lower aspect rigs, and
keels that are stubbier & swept back are the best.

Also in chop, lighter boats can be stopped by a wave.
The light weight water ballasted Mini-Transat boats
use ballast, not just for increasing righting moment
but to maintain inertia--the added mass keeps them
moving.

I agree a broader keel would be less likely to stall
in turbulent conditions. Why is it better for such
keels to be swept back?

Bart Senior