... A diagram could explain this much
much better.


Maxprop wrote:
Not really--that's quite clear.


Allow me to compliment your grasp of trig relationships. My boss doesn't
get it even after studying a diagram.



Most monohulls have elements of a sine curve in the stability.


Hmmm. The Beneteau graphs didn't appear sinusoidal at all, rather
asymmetrical.


That's a bad sign by itself IMHO. Consider the opposite case, a
catamaran... static righting moment hits max as soon as one hull clears
the water, maybe 15 degrees or less. The curve is almost vertical for
the first little bit, then drops off and becomes negative well before 90.

As a monohull becomes boxy & lightly ballasted, it's stability curve
trends more towards that catamaran type curve... good for sailing
performance under ideal conditions, but poor for "real life" sailing
IMHO. It can still have a good Limit of Positive Stability, though,
which the real meat of the matter.

Fresh Breezes- Doug King