Interesting thinking about launching, RAM kite vs inflatable kite.
INFLATABLE OR RAM-AIR KITE, FINDING A COMPROMISE
Two types of kites exist on the market: ram-air or foil kites, with a similar structure to that of paraglider, and inflatable kites.
The main difference is that the former, like a paraglider, will inflate solely thanks to wind power, whereas an inflatable kite will be inflated before sailing.
Inflatable kites are way easier to handle, especially for the take-off! On the other hand, they are also thicker and heavier: an inflatable kite will be significantly less performant than a ram-air kite.
When focusing only on performance needs during a run, it seems logical to use ram-air kites to propel our boat. However, when including the take-off stages, this choice is not so obvious! Keep in mind that we need to take-off huge kites (between 25 and 45m2) in strong winds (with gusts up to 45 knots), with waves that can rise up to 80cmโฆ and all of this from the sea!
We therefore made the choice to use inflatable kites, while optimizing them as much as possible to bring their performances closer to that of ram-air kites. By โoptimizingโ, weโre talking about working on a kiteโs shape or its bridles: for example, we can design a kite that has a longer shape, which is more efficient, but which will also be more complicated to handle on the water and will have more bridles, increasing the kiteโs drag. In short, itโs a matter of finding the best possible compromise!
Very Impressive! Well done! 
Some videos:
Another video including SP 80 in the beginning:
Fast and Comfortable Boats That Donโt Need Gasoline
Indeed, there is potential for wind-powered boats in total autonomy, with solar panels as well, or even with a hydro-generator. Sport and boating can and has already started to be a route to AWE kite success with traction and onboard power generation.
That SP35 run looked super bumpy
Do not fancy being the pilot inside that weird frame being smashed against wave faces repeatedly.
Itโs not going to work until that thing is foiling clear of surface problems.
Even the AC75 Americas cup boats cruised faster than that.
(BTW did you see the circles they were sailing? hint towards a model h-hmmm Iโve been considering)
I visited them a few weeks back, but had no chance to see them on the water. They are not planning to fly @Rodread, but planning to sail close to the coast with offshore winds once they have solved other issues and are ready to get rid of other sailors.
I see SP80 is getting up around 50kts now
Handy but
Iโm not convinced their going to break any sailing speed record though
The boat looks sturdy enough for work after speed life if they want to convert it into a mid line gen AWES
Old drawing alert
Would need a lot of room over the water for something like this