Hello Luiz,
The planing hull bottom that I tried was one design, one effort. I do not think it was optimized. I was primarily concerned with getting the boat to plane at all. Therefore I used a planing surface that was probably larger than optimum and easy to build, flat. To plane at lower speeds requires a low planing surface loading, pounds of lift per square foot of planing surface area. The combination of 'flat bottom' and low planing surface loading led to a hull that pounded severely sailing upwind in chop. The pounding problem can be attenuated with a vee shaped hull and less planing surface area, higher planing surface loading. This would lead to a higher displacement speed before planing began. I guess my point is that this planing hull thing is a large study and development program on its own. If I were to put more effort into it, I would try a vee shaped hull with concave surfaces forming the vee, very much like the hull surface of a sea plane. To support two people with a light hull loading, vee shaped hull, might take a longer hull than we are used to seeing for a two person boat. If we can keep the hull narrow. I think the pounding thing can be brought under control.
Bill