It's not so much about speed directly, but more about helping to keep the bows out of the water (preventing pitchpoling) and moving the CE back over the rudders to help the boat go better upwind. Basically moving everything back.
It's been a long time since I've sailed the 16, but I recall as a ballpark setting we took the main halyard, touched it to the bridal wire screw on the bow, held that point on the halyard and then walked back to the stern, and the point should be about 1 foot below the bottom of the transom (or the length of the upper rudder casting). I'm sure today's racers have more exact settings, but I believe that's where it was recommended to be set at the time.
sm
|