Sail area/displacement ratio

Like the Displacement/Length

Ratio, this is a useful parameter in comparing one boat with another. The sail

area is nominal, being that which is enclosed by two triangles, one

representing the mainsail, and the other the area between mast, forestay and

foredeck. Divide that by the displacement to the power

of 2/3. Use square feet for sail area and long tons 2,240lb for displacement.