Jake,
I've seen that Parlier cat--the hulls look like they're off a seaplane. The guy's a genius; too bad that cat broke up so soon.

Pete,
Any cat type that flies a hull downwind (F16/18, A-class, etc) would really benefit from a hull that truly breaks free (and I don't mean via pitchpole). I've seen the chines, the trip turbulators, the flattened sterns, etc. But have we seen any of these truly break free so the lee hull is skipping on top of the water like a wake board?

It sounds like with enough wind Jeff gets planing on his Arrow--totally flat bottom from front to back:
http://www.seabreeze.com.au/News/Sa...nglehold-in-Arrow-cat-class_2251396.aspx