The most effective way is to increase kite size.
Since you don’t want that, the next thing I would do is to increase the volume Thickness of the board, the last thing I would do is a larger hydrofoil wing.
Hydrofoil has taken kiting to another level, a small wave will power the hydrofoil, when there is no wind one can pump against the wave, kite is no longer required.
hey Hawaiis if you can ride with that old and heavy Ozone Edge and that old school foil from 7 years ago in 4/5 knots I can't imagine what you can do with a light kite and a big modern foil from 2021. :D Thanks, That was 2014, when the kite was new. The same kite can’t go out in 8 knots winds today...
[quote=Hawaiis post_id=<a href="tel:1153953">1153953</a> time=<a href="tel:1636705264">1636705264</a> user_id=42635] It can be done, and very satisfying https://vimeo.com/108637969 Directly waterstarting in front of swimmers with HF board ? One would get more than stink eyes where I live [/quote] T...
My wild guess is about 14 knots. The hydrofoil can easily go at triple the wind speed. You can also use the kite at a higher angle to help you lift off the water.