RACE MODEL™ ...measures effects of sail/rig adjustments on rating and vice versa

Understanding how adjustments in sail shape affect speed is only part of optimizing a boat’s performance. Race Model allows North designers to account for changes in rating from one test configuration to another. The Race Model can predict which configuration will win in a handicap race over various courses.
Shown here is a comparison of standard (Pinhead) and squaretop mainsail roach performance vs. rating on four courses and various wind speeds. For this yacht results favor the standard mainsail roach.© North Sails
Comparison of standard vs. squaretop main on a different yacht shows different results, with the squaretop main being favored.© North Sails