Thanks, so our kitefoil big wings are too small in general it seems, for now.
In 25 knots many might ride waveboards instead (if you got waves), as you can ride with 6 m2 LEI kites here.
So no overlap between our big kitefoil surf wings and wingfoil wings
You need new wing(s) it seems.
Regarding volume (of the wing), it is not a good parameter regarding lift and how early you can start.
Mean camber in percent would be a much better scale to use, if you only were to use one, as it is the most important regarding lift.
An example could be a 15 % thick symmetrical wing, versus a 7 % quite cambered wing, same area and span.
The last one will only have around 40 % of the volume of the first one, if a typical high lift thin profile like the Eppler range, compared to say a NACA 15 % symmetrical one.
But it will also have a max lift coefficient around 1.4 or even 1.5 and less than half the drag at this lift, compared to the twice as thick wing.
So 75 % more lift from the wing less than half the volume, and still half the drag.
But because of the low AR of these wings, the high lifting thin wing will have the double amount of total lift, at 1.4 lift coefficient.
Meaning, bottom line is, it will have 25 % better sink rate, thus it can start earlier and/or require a smaller wing/kite.
If it was high aspect, the difference would be a factor 2, meaning 100 % better.
If EXTREMELY high aspect, we are looking at 10-20 times as good, meaning 1000 to 2000 % better.
It somehow explains why the higher aspect wings starts earlier than the low aspect ones, eventhough the low aspect ones are a lot easier to handle.
Just examples, so using the max lift coefficient at the point where the drag does not increase hugely, if known, would be the best parameter regarding how low you can go in terms of needed kite/wing or wind, IMO.
Back to the wing-wingsizes, bugger the big ones we use for kitefoil still seem too small, as is now