Quote:
Originally Posted by Hiracer  ... If you take two boats at 35' with the same empty SA/D ratio of 17, the one with an empty displacement of 17,000 pounds will have a better final SA/D ratio than the other boat with an empty displacement of 10,000 pounds after you load each of them up with 4,000 pounds of cruising stores. Assuming reasonable design quality for each boat, the heavier boat will be the better sailor fully loaded--period. Its SA/D after loading will be 14.8 compared to only 13.6 for the light boat... |
But, why would you compare a taller-rigged, heavier boat, to a shorter-rigged lighter boat?
Wouldn’t you typically expect the lighter boat to have a higher “empty” SA/D ratio than the heavier boat, of otherwise comparable features?
Dave Gerr’s
“The Nature of Boats: Insights and Esoterica for the Nautically Obsessed” is also available to read (free) on-line.
http://books.google.ca/books?id=yc6Q...um=4&ct=result
Gerr is also the author of the
“Propeller Handbook”, and “
The Elements of Boat Strength”, all published by International Marine/McGraw-Hill