so, in THEORY, you'd want it long and skinny when sailing flat. As the sails work to push the bows down, you want increasing volume up front to counter this force.

To turn, you want enough volume in the middle to make for a quick pivot.

And to carry weight in the stern effectively, you need volume back there, but not too much as to make drag a problem.

No problem, right?

Make a long skinny bottom section, add two foils in the middle to lift the boat up when you want to turn, and put some huge wings at deck level (like one of those Piewacket boat designs) to keep the sterns up

too bad something like that wouldn't float in real life....