[mboyer68]

The definition is difficult to understand.
Stiffer, doesn’t seem like a ratio of weights can determine stiffness of a boat, but I’m not sure.
More powerful: seems like power comes from the sails, not the relationship between weight of the keel and weight of the boat, but I’m not sure.
Better able to stand up to the wind: same answer.
Any hull designers out there? Help?
Please?
Bal./Disp.:
A Ballast/Displacement ratio of 40 or more translates into a stiffer, more powerful boat that will be better able to stand up to the wind.
Bal./Disp = ballast (lbs)/ displacement (lbs)*100