Reducing the apex reduces the lift in that area .I know a local shaper who talks about the "speed box" in the middle of the board. He swears by it. Putting a single concave in the middle achieves the same thing.
I'm always a little skeptical of the use of the word "lift." I remember Roy calling out Daniel Thompson for his use of aero/hydrodnamic terms. I actually thought Roy was right in that instance.Reducing the apex reduces the lift in that area .
Entry angle on my boards reduces as it nears the center to none - the the exit begins ! ;-)
Flip and mostly flat areas of rocker are a tell.I have little to no understanding of this with surfboards but I have experience with wakeboards. I liked three stage rocker on wakeboards cause I rode steeper wakes and it translated to my riding style better. continuous rocker seemed to be better suited for mellower transition of boat wakes (manufacturer speciifc).
Just rambling thoughts in my head but I wonder if I would like a staged rocker in steep waves a continuous in mellow point style waves?
i'm embarrassed to say I don't know what kind of rocker any of my boards have in this regard
Thanks for the clarification. I guess I would have called that "planing" rather than lift , but a quick google says it is lift.Entry angle helps create initial lift up to plane - angle hand upward out car window to experience this ;-) - No foil involved
Tail rocker controls that planing effect and release of planing pressures , still entry and exit angles all thru the back half depending on the angle the board is riding on .