Yve-Maries rendering also shows it's increasing the Cp as it heels which increases the S/L. Scows have always worked this way. Sticking a pointy bow in does nothing for Cp. The more breeze you have, the more you heel, the more Cp you have the faster you go. I think that's how it works. Maybe Yves-Marie can double check my logic.
Think of what Beneteau could do with that bow volume in their mom and pop cruising boats. It makes me shudder.
Bob, your point about Cp sounds extremely valid to me.
Besides "the more Cp the faster you go" I believe, despite my lack of N.A education , that there are other advantages.
As it happens, one of the companies I'm involved in, has built Scow S.U.P boards, 18 months ago, mostly out of curiosity.
Of course, those crafts do no take advantage of heeling and are 4-5 kts shit-objects, except....... in Downwind races when true speeds are attained from surfing a significant swell.
That's where the Scow really paid off !
The nearly straight outline "sides" all the way to the bow mean that the board-front is much much less prone to yawing and tripping (if at all) than a pointed bow.
It might not be faster when everything goes well, but maintains a more constant speed while being much more comfortable
Misplacement on the swell and/or loss of lateral balance do not require as much attention and concentration anymore and the longer the race the larger is the difference.
I have noticed that 747 built its lead in rather strong winds from well aft and was most probably surfing (like others) rather large waves.
"The wind consistently exceeds thirty knots as one moves away from the coast and the combination of a breeze over a residual northwesterly swell"
While Lipinski described his dismasting "I had a first warning last night hurtling down a steeper than usual wave. Result, I broached violently".
747 also sailed in a much straighter line than all, bar one at a time, when you can see the rest of the fleet gybing and gybing back all the way down.
I therefore suspect that 747 has shown an other advantage of scows offshore: handling the downwind waves better and being less demanding on the skipper and auto-pilot alike.
Other boats look to have been as fast or faster at times, but none has been that consistant.
Just the 2cts of an observing follower .