Open for conjecture.

Interesting - this is the blurb from the Zeeko website (see below) - surely it would be hard to make these claims unless it actually worked?? - has anyone tested it?

ANTI VENTILATION SKIN
Hydrofoil wings ventilation occurs violently when air enters the surface of your foil wing as it approaches the surface of the water. This result is an inevitable fall, wether you are an expert or beginner.The Anti Ventilation Skin (AVS), is a new process of manufacturing foil wings in G10. Thanks to a 3-dimensional grooving design of the foil wings, it is now possible to reduce the ventilation phenomena to a minimum. The AVS acts like a multitude of fences or a shark skin preventing the air from rushing all along the wing.Thanks to the AVS do not fall any more when your foil wing is clode to the surface of the water. Gain confidence and ride without thinking.

Another way Zeeko pushes the technology forward.

Should make the wing work well in white wash.

Like most things - does one thing better but??
I recall a long way back in my wind surfing days cavation was an issue then along came the magic fin with a slot to let air through (I still have one of these fins on my garage wall).
In time we developed skill and these speed reducing fins became redundant.

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warwickl said..
Like most things - does one thing better but??
I recall a long way back in my wind surfing days cavation was an issue then along came the magic fin with a slot to let air through (I still have one of these fins on my garage wall).
In time we developed skill and these speed reducing fins became redundant.

The best cure for spin out on a windsurfer is a correct tuned sail.
but that is Cavitation not Ventilation.

this I see as that extra little bit of help when carving or as you approach surface with wing.
maybe give a more progressive feeling to a breach.
this applied to a Spitfire could make its soft breaches even softer or even give enough warning to stop them. Not completely but near enough.

as I is I am finding that the incidence of recovery to foiling without a touch down after a breach on the Spitfire goes up with each session.
this AVS is only a good thing IMHO

The canard design certainly reduces the number of spectacular crashes when you breach.

I think the bigger SUP style wings do as well.

Here is some explanation plus pictures on page 6.
issuu.com/zeeko-kites.com/docs/alloyserieswindfoiluk2018

My limited knowledge of golf balls and dolphins' skin says that having a rough or dimpled surface creates a disturbance over which smooth air or water flows are created, increasing efficiency. Is this the same concept?

My skin is very much like this and has not helped me.
Plus I still ventilate.

Windsurfing fin cavitation was mostly solved through better fin design, not through the gimmicks we all tried .
Slotted fins , stepped fins etc.
They worked a bit but not nearly as well as a good quality , well designed fin .
There was no comparison once we could get hold of them ( and afford them ! )

I would apply that principal to hydrofoils as well.

Over time we have seen development focus on concaves by the single and dozen , fish , width vs length , aspect , slots , steps , fazers ( anyone remember them ? ). , "shark skin " surface , V shapes , stepped tails and on and on .
Some of the ideas were just a marketing tool.

Mostly the ideas have fallen by the wayside aand good clean design wins over in the end

Just my thoughts ....

Be careful not to confuse surface tension with Ventilation.
the AVS is a way of interrupting the travel of air deeper along the wing.
and I say again in regard windsurfing fins, properly tuned sails cured most all spinout and still does, plus Spinout is a overload induced cavitation. Not Ventilation.

Meh, if it looks like an 80s windsurfing gimmick, it reads like an 80s windsurfing gimmick, of course it's going to smell like an 80s windsurfing gimmick, regardless of the difference between cavitation and ventilation.

For myself, I'm getting better and quicker at feeling when I'm on the verge of ventilating and "unweighting" the foil so it can ride back down at a low angle of attack, thereby not taking the air with it, and regain lift.

I'm a happy Zeeko rider but that's based on the simplicity of their designs so far, not "3D grooves" (what other kind are there?) in G10.

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Lambie said..
Interesting - this is the blurb from the Zeeko website (see below) - surely it would be hard to make these claims unless it actually worked?? - has anyone tested it?

ANTI VENTILATION SKIN
Hydrofoil wings ventilation occurs violently when air enters the surface of your foil wing as it approaches the surface of the water. This result is an inevitable fall, wether you are an expert or beginner.The Anti Ventilation Skin (AVS), is a new process of manufacturing foil wings in G10. Thanks to a 3-dimensional grooving design of the foil wings, it is now possible to reduce the ventilation phenomena to a minimum. The AVS acts like a multitude of fences or a shark skin preventing the air from rushing all along the wing.Thanks to the AVS do not fall any more when your foil wing is clode to the surface of the water. Gain confidence and ride without thinking.

Is it April ??

longer mast and you won't get turnbull;ences and ventilation close to water surface.our KFA filefish and Mako3 foils got surface piercing tips you can ride out of water up to 30% of wing without blowing out..

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INTHELOOP said..
longer mast and you won't get turnbull;ences and ventilation close to water surface.our KFA filefish and Mako3 foils got surface piercing tips you can ride out of water up to 30% of wing without blowing out..

Just what I need how does it compare to firefish?

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INTHELOOP said..
longer mast and you won't get turnbull;ences and ventilation close to water surface.our KFA filefish and Mako3 foils got surface piercing tips you can ride out of water up to 30% of wing without blowing out..

How does a longer mast reduce ventilation? Is it just that it reduces the chance your foil will get close enough to the surface before you correct?

Cool! Would like to try it

But breaching a tip or the whole wing isn't an "inevitable" fall.

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Kamikuza said..
Cool! Would like to try it

But breaching a tip or the whole wing isn't an "inevitable" fall.

Something more for your sponsors to work on. ;)

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RAL INN said..

Kamikuza said..
Cool! Would like to try it

But breaching a tip or the whole wing isn't an "inevitable" fall.

Something more for your sponsors to work on. ;)

I have sponsors? You make it sound like I'm using the forums to promote my brand without doing the owners the courtesy of paying for advertising, instead of just joining in the discussion and offering my thoughts and opinions on gear I've used or paid for...

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Kamikuza said..

RAL INN said..

Kamikuza said..
Cool! Would like to try it

But breaching a tip or the whole wing isn't an "inevitable" fall.

Something more for your sponsors to work on. ;)

I have sponsors? You make it sound like I'm using the forums to promote my brand without doing the owners the courtesy of paying for advertising, instead of just joining in the discussion and offering my thoughts and opinions on gear I've used or paid for...

Sorry if I hit a nerve there Kami.
just this statement you posted along with pics of a stack of pre production wings etc. lead me to believe you had more than a basic customer connection to Axis.
Kami said
"Been riding an Axis SUP wing past few days, 720mm wide, flat water and small waves. Not sure if it's production model or prototype...I know we've tried three different rear wings, and two sizes mast. The last set up I rode was excellent fun."

As far as me posting information on and offering advice for Zeeko products. It's all pretty clearly spelled out in my profile, where my allegiance is.
like this

Nerves now...

Yeah so I'm back in NZ for a few weeks, and Adrian likes sharing his gear around. I'm lucky to share a hometown! If you're at the beach when he's there, he'll offer you a bunch of stuff to ride so it's not like I'm a special case.

I do think though that he appreciate the input on stuff like the big wings, as he doesn't get many hundy-plus riders to push (punish?) the equipment.

It's great fun, he's a real gent, and he doesn't get septic if you choose not to buy gear from him.

Bump..... any reviews yet?

The new XLW wings with AVS

Would AVS work on masts to reduce cavitation/ ventilation?

I think it acts to stop Air progress from wing tip in. But mast has ends capped by board of fuselage.
And what is the result of cavitation of mast?

Most probably AVS is pure marketing blabla, another useless 3 letter marketing "innovation".
If one really does not fall with that foil when the wingtips come out of the water its probably because of a clean and simple and straight design of the wing and profile that makes everything predictable.
I?d say on a very curved and fancy dihedral or anhedral wing you loose a lot of counterforce that creates the equilibrity between right wingside and left wingside as soon as one side of the wing is in the air. Then you just get the roll momentum of the wingside thats still under water and most probably you?ll fall. So the straight wing comes more likely out of the water then a downwards shaped one. But if it comes out of the water nothing "crazy and unpredictable" happens...

kitehydrofoil.com/design.html

AVS is simply an idea that Nicolas came up with to try. Which he did try and found to work.
it has a logical base that was worth moving forward on.
If it was just Marketing BS then why bother putting it on the XLW Spitfire wing set? There is no marketing advantage to applying that to a unique product that has no competition in the Market.

Malaco, I look forward to reading your second forum post.

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RAL INN said..
AVS is simply an idea that Nicolas came up with to try. Which he did try and found to work.
it has a logical base that was worth moving forward on.
If it was just Marketing BS then why bother putting it on the XLW Spitfire wing set? There is no marketing advantage to applying that to a unique product that has no competition in the Market.

Malaco, I look forward to reading your second forum post.

So, second forum post: ;-)
So what is "it" in your opinion they bother "putting" on that wing? ;-) What is "it" behind those magic three letters what they are applying? Will it stay? Will it fade? ;-) Is the hydrofoil still usable when it fades? ;-) Do I even have to reapply it after some use? (I better shouldn?t get the marketing guys started thinking about selling the magic sharkskin polish for just 19,99$ a bottle!) ;-)
You really believe that you could tell a difference just riding the board between a
1) white spray painted wing,
2) the wing they "put" the magic "AVS" on and
3) a wing someone treated a little bit with a very fine abrasive paper?
Of course under real double blind test conditions!

Don?t get me wrong, it seems to be a nice and reasonable priced hydrofoil with a clean design where really form follows function. I like that and I?m thinking about buying one (like new but second hand). Doing a little online research thats how I ended up here.

AVS or Anti Ventilation Skin, is a series of ridges machined into the surface of the Wings.
So not a coating.
Each ridge acts as a mini fence to restrict the movement of air along wing towards fuselage that disrupts the laminar water flow causing loss of lift.
Nicolas is progressively adding it to the manufacturing process of Zeeko's range of wings.
The pricing due to AVS has not changed.
The Spitfire design is inherently more softer response to ventilation in respect to Old style foils, and adding it to the XLW wings might seem a waste. Certainly demand for the XLW wing set exceeded supply prior to this addition, so I can only speculate that Nicolas has seen it as an improvement and incorporated it into the product. That's the Zeeko way.