Quote Originally Posted by Lucky Dawg View Post
I need mathmatic or physics assistance...

Can someone help me understand the relationship between theoretical hull speed and the actual sailing capacities of these yachts. We did 7.2 the other day and I thought I was getting a bad reading or something - or just one FINE sailor. Frank put my speed to shame! I understand the theoretical hull speed mathmatical calculation, but why are these boats apparently regularly far surpassing that?
The formula for theoretical hull speed (ths) is:

ths = SQRT(LWL) x 1.34

Therefore as the boat heels over, the LWL increases and therefore ths increses as well.

And just for the record, I am not a math major (far from it), but I found a great pearson website that had that, and other formulas, on it. Here it is.

Jack