How much difference does a few more pounds on the mast make?
In a small, unballested boat a few pounds on the end of a lever arm of 19 feet is equivalent to about 40 or 50 pounds of crew weight. You'll be that much slower to recover from a puff and all the more likely to broach during one. You'll also be unbalanced to the center of effort as the rig is designed to a certain center-of-effort vs. center-of-lateral-resistance off the centerboard and you've moved it back if you add 18% more mainsail. It may have so much weather helm your rudder won't be able to compensate; and it will certainly add so much drag fighting the main that the added sq. footage won't help much when going upwind or reaching. If you shorten the boom to compensate that will help - giving you a higher aspect rig - but you'll have to be more careful with crew weight to keep her upright.
Charlie P. P31-2 #80 CATNAP
To travel hopefully is a better thing than to arrive - R.L. Stevenson
I suspect that, if you should go to the end of the world, you would find somebody there going farther . . . - H.D. Thoreau
Last edited by Delirious; 10-09-2008 at 12:44 AM.