Wouter, I appreciate your restrained responses on this subject.

Your explanation really strikes a chord from my landsailing and drag from the rig being the primarily limiter of speed. In beachcats I was sure it was hull drag, although I knew it wasn't Froude's thing. Also experiments of others have shown that while increasing max speed, planing hulls aren't the answer for general sailing beach cats. At least until highly sophisticated, very robust cheap systems become available.

So, for just an approximate understanding of what's happening on more recent beach cat hull designs when the crew sense 'planing' are the hulls just experiencing 'forced mode' in different (from, say, a Tornado, Tiger or P19) way?