"Michael Daly" wrote in message ...
On 9-Jun-2004, Marsh Jones wrote:

knots =(1.3*((SQRT)LWL)) which means that a 16' boat can go about
5.2Knots regardless of how much power you put to it. (Unless you can
pop it over the bow wave and get it planing).

Not really. Olympic class paddlers, as one example, routinely take their
canoes/kayaks well past hull speed without any evidence of planing. Hull
speed isn't a speed limit, it's a point where paddling gets tougher, faster.
It seems to have more relevance to big fat vessels (like keel boats) than
to long, skinny paddle craft.

Mike

Spot on.
Most sail boats will slip through the water with little wake; but you
see an over powered speed boat with 150 HP engines going the same
speed ( Not Planing ) the speed boat is pushing a ton of water and in
spite of pouring much more fuel into the enging, it does not give a
reasonable return for the fuel burned.
Hul speed is an efficiency curve