I disagree with just about everything in that post (#56) but I'll just say this: we must have common terms or we are sunk
. Whether lift exceeds drag or not has
nothing to do with speed. Lift and drag are orthogonal vectors on a boat. Lift is up, drag is back (thrust forward, weight down). Lift definitely reduces the displacement of a planing boat (planing is here a verb not a noun), as Archimedes would agree. Planing is not required to exceed "hull speed", it just reduces the power required to do so.
You'd have to agree that a nearly submerged sphere is a "displacement" shape? And a submerged sphere is nearly unique in that it produces essentially no lift. Do you doubt that I can tow one at many times faster than 1.34 x diameter ^ 0.5? All that will happen is the stern wave will be well behind the sphere, and it will require a lot of power. This is an existence proof of a displacement shape exceeding hull speed that you can do yourself.
I don't think 10,000 hp is going to do it for Delphin - that's why I suggested 100,000
.