Man those are serious words Marc!!!

The entire system (boat, wind, sails, waves..etc) are a VERY dynamic system to say the least. Nothing stays the same for very long. Heck, just replication of a previous event is nearly impossible.

Simulation/modeling of other less dynamic situations is possible, but in those cases, there are much fewer variables and variations within those variables. That doesn't make them easy by any means, but... The quantity of randomly generated variables in sailing is well beyond the power of any computer or programmer.

To rephrase what someone else said, simulation/calculation can only get you in the ballpark. Successful designers work with that knowledge in mind. You design for what you want, but build in some "extra" just to make sure... rig for the lulls.

so that was way outside the initial post... I guess what I want to say is, show me the correlation or combination of, that will predict max hull speed on a boat that has two hulls with areas of displacement, areas of planing and areas of transitional movement. With all changing at the same time in random fashion.

Not saying it can't be done, just doubtful that it can be done accurately in the conditions we are speaking of.

Will R