I've ridden many different wings, and a few different foils/brands too.
And with all of them experienced something odd:
When you go at really high pace, suddenly the wing loses its lift and you crash forward.
Like the carpet has been tugged away under you, and a deep hole is underneath ha haa !
It is VERY odd, and I would hear if others experiences the same sometimes ?
I am really experienced, and I know for sure it is not because I foil too high when it happens, so not because of surface ventilation.
On the other hand, I mostly ride in quite choppy water - so a couple of guesses :
1. Some kind of underwater bubbles causing abrupt separation - maybe coming from the white caps on the surface going deeper ?
Although, it happens in low winds too with almost or no whitecaps, so not very likely ?
2. Can it be a delayed separation, coming from foiling too high and partially ventilating, thus having air around the wing but still lift - and then much later when foiling deeper for a while, it seperates suddenly ?
Hmm, maybe - but still not convinced this is the reason...
3. Running into seagrass ?
Could be, but it is winter here, so havent seen any seagrass for ages - and it feels different (used to it from summerdays), as it will not always give a total separation like experiencing now, but often slow down only, or partly seperate, or give a tug to one side or the other.
4. Could it simply be when hitting a fish ?
This could explain it happens with every wing and every foiltype, and also when riding deep.
And the reason why it happens most often when at speed, could be the fish dont get away in time, and might also just be imagination because the consequences when at your max speed is much more challenging when wiping out
I find it really odd, and I can foil much higher even in chop, at lower speeds or going upwind - can even save a bit of surface ventilation most often even without straps (think straps would help at high speed to keep it level and maybe regain control - but depends on the very cause that is unknown...)
But this abrupt loss of lift at high speed when foiling okay deep, anyone experiencing this too ?
Anyone knows what causes it ?
Anyone who will try to guess what it could be ?
I dont know...
But it means I can not ride "relaxed" at speed for indefinite time without crashing eventually, simply because of this phenomenon that happens now and then.
Which is several times per session typically, or more.
It is not really a "problem" as such (although a bit painful when winter and going 20-25 knots), but I am really curios as to what causes it !