I wonder what'd happen if you tried to scale a 30-something ft stepped (racer) hull up to about 55. And tried to put a couple of full size cabins...
IIRC there was a concept car with hydrogen generator made in the 70's that used water and ALUMINUM WIRE as fuel. Can't remember how, exactly, the...
I was thinking convex/concave/straight (parallel) tunnel sides (at the waterline) as seen from above/below. Purely theoretically, of course...
So... Symmetric hulls will pile up/accelerate water in the tunnel Asymmetrics leave the flow/water level in the tunnel basically as it is? So...