I seem to remember that there were some polar diagrams in Bethwaite's book "High Perfomance Sailing" or something like that. Bethwaite thinks that planing monohulls such as the Aussie 18 ft skiffs are the way to go. I heard such boats are so unstable that they're better swimming platforms than anything else. Any advantage in straight line speed would be more than cancelled out by time spent capsized. Where's Bill Roberts? He probably knows where to find some diagrams.
David Ho
TheMightyHobie18 1067