Downwash is lift as well, especially when it is close to the “ground”...
Nose down can run the risk of AoA being too negative and the underside increasingly becoming the “lifting” surface, causing a harder landing.
There are many things at play here.... interesting times.
As for the next edition of the cup, all they have to do is remove the bow restrictions and all the “boats”will become tunnel hull ground effect scows. Why else would Welbourne (who knows a thing or two about dynamic lift) choose a scow shape over a skiff shape?
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