Planing hull kayaks??

[river runner]

Originally Posted by river runner

. When a power boat gets "up on plane", there is a sudden and dramatic reduction in resistance. My understanding of what is happening is that with enough power the boat climbs on top of it's bow wave. At low speed a planing hull acts like a poorly designed displacement hull, pushing up a big bow wave. Give it more power and it climbs up on top of that wave.
.

I knew I didn' just pull this out of thin air. In Skene's (eighth edition) on page one of the chapeter on planing power boats he gives a description of the mechanics involved in planing that is very close to what I say here. He also goes on to say the mathematical definition of planing is a speed/length ratio of 2 or better.

[Leo Lazauskas]

Originally Posted by river runner

... He also goes on to say the mathematical definition of planing is a speed/length ratio of 2 or better.

That is purely Skene's opinion - it is not a physical or mathematical law.