I am sorry that I inadvertently posted your name when I meant Rick.

But again I am confused, you say "However: A Newton is a unit of force, and a Watt is a unit of power.  You need to read up on the SI units before trying to calculate with them. Garbage in => garbage out"

The joule (/ˈdʒuːl/ or sometimes /ˈdʒaʊl/), symbol J, is a derived unit of energy, work, or amount of heat in the International System of Units.^[1] It is equal to the energy transferred (or work done) when applying a force of one newtonthrough a distance of one metre (1 newton metre or N·m), or in passing an electric current of one ampere through a resistance of one ohm for one second.

In other words J = Nm = Ws

It is common to convert units for comparison purposes Peter. I am generally looking for the work done which brings us back to our earlier discussion. The work done by a displacement hull is exactly the same work being done by a planing hull.

I will give you a simple example, if you pick up a weight from the floor and put it on a shelf, you have done work. If you return the weight to its original position on the floor you have not done any work. Yes you have spent energy and used force but you haven't done any work.

It is kind of like beating your head against the wall it may feel good but it doesn't do anything.

Cheers,

Talador