lets look at known quantities here.
at speed trials for the last few decades a lot of craft have reached their limits no matter how much time money and effort is thrown at them.
windsurfers blew the doors off conventional thinking about sailing speed in the eighties and continue to inch forward knot by knot.
kites have just entered this race.....did i mention doors!
i consider kites to be every bit as legit as windsurfers and the guys achieving 50 knots are trained athletes.
pulled along by a parachute!!!!!! "far cough"
break the classes into "masts with stays", "masts without stays", "free for all"
and the biggy " fastest wind powered man on water"