Posted by John Nichols on December 16, 2005 at 18:13:51 from 165.91.198.54 user Mcneacail.
In Reply to: A boat for a small person (was A rig for Mary Anne, was Mainsheet, was traveller) posted by Jock on December 15, 2005 at 14:06:23:
Jock:
The sail area of the Selway fisher is 35 sq ft, the sail are of the revised Mary Anne is 58 sq ft and the Scarab 92 sq ft.
I have plotted the boat length for the three boats against the sail area in a EXCEL plot. I can then fit an equation to the data points to obtain an equation of the form for the sail area in square feet:
Sail Area = (0.81 times (boat length in inches)) - 39
The regression coefficient is 0.9962. A regression coefficient of 1 is a straight line.
I am happy that my sail is about right for a 12 foot boat. I will however put a set of reef points into the sail.
JMN