I wondr how fast that kite was going. those windows on the pod look like my kids were in there having a too long hot shower .some vents would be a good start and some tinting, some flat water as you pointed out, Still ,good luck , and good on y ou's for trying
But a tall narrow wing doesnt have a lot of low speed grunt to pus you up onto the foils. with a good chop slamming you back ,maybe they couldnt get up on the foils. The wing would need a steady wind /surface conditions and some distance to wind it up.
I cant believe he didnt sheet on and let rip, at least get the thing foiling for the media.
It looks like it has bugger all wing area - if the thing cant go in 30 how is supposed to go in 20?
Looked up Wiki to see what there is out there on supercavitation - not much. From what I can gather its main purpose is to get a superbubble on the low pressure side which doesn't collapse and cause damage until the foil is clear. Deliberately inducing cavitation also bypasses a normal foils unpredictable behavior at ~50 knots. But the compromise is they have to have a high angle of attack and so a lower lift to drag ratio.
So getting the craft foiling might be the crux of the matter. Maybe it'll do 5 knots or 55 knots but nothing in between? 55 knots or bust. Good on 'em. Oi! Oi! Oi!.
Do the rules prohibit it being dropped from a mother ship at 40 knots? No different from jettisoning bits as the speed rises. As for supercavitation, big difference between 1000 horsepower to make a torpedo go fast and the 10 horsepower they have to play with. OOps! Back to the drawing board...
Or tow it up to planing speed with a kite Sorry I just remembered this is the windsurfing fourum. As long as they wore boardies over thier sailing gear that would surely be allowed in the rules
. those windows on the pod look like my kids were in there having a too long hot shower .some vents would be a good start and some tinting, some flat water as you pointed out, 
Sorry I just remembered this is the windsurfing fourum. As long as they wore boardies over thier sailing gear that would surely be allowed in the rules