Cats, for the most part, follow the same rules as other displacment hull boats. The very simplified way to calculate maximum speed is:
Maximum speed(in knots) = square root (waterline length(in feet)) times a constant
Please... I'm no scientist or anything close, but it's not "Maximim" speed. It's hull speed or wave speed or some other term, but not MAXIMUM speed. Hull speed is not a synonym for maximum speed. Saying maximum speed just confuses these threads. Hull speed may be the max speed for the current configuration or the realistic max speed, but it's certainly far from the actual maximum speed.
That is all. Carry on <img src="http://www.catsailor.com/forums/images/graemlins/smile.gif" alt="" />
