Bearing in mind what driving over tiny bridge partition gaps in the highway at 120mph is like, (and we are talking about bumps a few millimetres high), I imagine getting shaken to bits on the chop is the big hurdle to overcome sailing on water at 80knt+ ...
FWIW probably the best way to go 100knt+ over water, using wind energy alone is probably this: ...[:D
Whad-Ya have to go & post THAT for ?
Now i gotta go FLY something ; a HG or a PG, whatever the wind gods say is best
for the day !!
YEA, i know what your saying on the "shaken" thing ; when i Had feet, i made a pair
of roller-blades with two large air tires 8" in diameter in front & behind my foot.
then i went to the dry-lake with a 5M kite & the home-made blades ...
At about 25-30mph, my brain shook so much that i couldn't see out of it ; so i
dropped the air-pressure from 32lb down to about16, in the tires. I could see now, but
they weren't Nearly as FAST !!
Thinking about it ------- That was a Really Stupid thing to make & try ?(sure was FUN though)