Bringing back the mythological bad old days with this 50 m monster when bigger kites were better. Actually, smaller kites that flew faster, generated more apparent wind were more fun to fly if not better as well. Simple projected area wasn't the whole story for finding power at the low end. I recall having a slow 23 m Airblast with a larger area than my hang glider!
Image from
https://www.facebook.com/fym.Tarifa
You can see a lot more of this kite in action with its designer Don Montague in the following video. It was designed for boat propulsion which it seems to do very well. I have to say it looks a lot faster and easier to turn than my old monster Airblast kite.