Forums > Windsurfing Foiling

Ezzy Hydra

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Created by Paducah A week ago, 8 Jun 2018
Paducah
68 posts
8 Jun 2018 12:26PM
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Not feeling this one
review: 2xs.co.uk/ezzy-hydra-windsurf-foiling-sail/


Maddlad
WA, 160 posts
8 Jun 2018 2:01PM
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Yeah i saw that online somewhere earlier today and it looks bizarre to me.

seanhogan
2807 posts
8 Jun 2018 4:15PM
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not to mention the race ltd model :




The Windsurfing Shed
NSW, 268 posts
8 Jun 2018 6:51PM
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Select to expand quote
seanhogan said..
not to mention the race ltd model :





Good photoshop skills

seanhogan
2807 posts
8 Jun 2018 4:53PM
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hahah not me, from wind33 (I barely use mspaint )

RichardG
WA, 1340 posts
Monday , 11 Jun 2018 5:55PM
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I am not a foiler and have never tried it although I am interested in it.

I found this on facebook re the Ezzy Hydra:

"HYDRA: The new windsurfing foiling sail from EZZY Sails:

David Ezzy fell in love with foiling over a year ago: "I got into windsurfing 45 years ago because I loved it. I had no idea that it would take me on the journey that is my life. When kiting came around, I tried it, and I said: nope, not for me. When SUP started, again, I said: nope. But I tried foiling last summer, and I can't get it out of my head. I go every day. I literally go foiling every day. All I need is 7 or 8 knots of wind, and I love it."

Like all Ezzy sails, the Hydra is born from David's passion and attention to detail. The first thing that David noticed about foiling is that it opens up a whole new challenge for sail design. The fundamentals of foiling are simply different than normal windsurfing, which is why the Hydra looks nothing like a normal windsurfing sail.

First off, because the foil can fly through the water with so little drag, the wind angles are different, which means that the apparent wind (the wind created by your movement) shifts forward. Second, you need a powerful sail to pump up onto the foil, but once you're on the foil, you want a very easy to control, light sail. And third, you're above the surface of the water when you're flying on the foil.

The elongated foot on the Hydra takes advantage of the board's height off the water to create a hyper efficient sail. On a normal windsurfing sail, a long foot like this would hit the water when cruising and simply not work, but when foiling, we can take advantage of this "free" space created by flying above the water. The extra long foot forms an end-plate with the board. This is very similar to how winglets work on a jet wing, and aerodynamic theory tells us that an end-plate like this greatly improves the efficiency of the sail. For example, David can ride a 4.0 in conditions he would normally ride a 6.5.

The extra long foot provides the needed low-end power to get up on the foil without using cambers or an extra batten below the boom, saving close to a kilo in weight. Being able to ride a smaller, lightweight sail makes foiling more fun by giving you the sensation of flying with nothing in your hands. You want a sail that "goes away."

The extra long foot also makes the sail more stable. This means that you are less vulnerable to gusts throwing you off balance when you're flying on the foil, which makes foiling a lot easier. But at the same time, because only the foot is extended and not the entire sail, the pull of the sail remains forward for a more comfortable sailing experience. The Hydra also borrows the 3/4 batten concept from our hardcore wave sail, the Taka.

A 3/4 batten allows the sail to luff, which means that it can easily go from full to flat. This is important for many aspects of foiling. This helps the Hydra to be extra powerful when you're pumping it but flat and responsive when flying on the foil. And, the Hydra's 3/4 batten is the reason it can de-power so easily and change its shape for the needs of the foil. When you sail up wind, you want a flat sail, and when you sail downwind, you want a full sail. The 3/4 batten allows both to occur without having to adjust the outhaul.

Overall, we had 5 goals when designing the Hydra and we are happy to say that the design accomplishes each one. The goals are:

1) Must be more efficient than a normal sail

2) Must be less sensitive to gusts than a normal sail

3) Must have early power to get up and going but also controllable when flying

4) Must be able to de-power easily

5) Must be super light weight

The Hydra is a dramatic new look for a dramatic new form of windsurfing.

Available in 4.0, 5.0, 5.5, 6.0, 7.0. In love with the flying of foiling, David is happy to release the Hydra to everyone who already loves foiling and everyone yet to discover its magic."

Seems similar in concept to this Andre Lefebvre Cutaway sail from the late 1980s.



On the Hydra the extra long foot provides the needed low-end power and drive to get up on the foil without using cambers or an extra batten below the boom, saving weight and claimed providing stability. I guess it works better on a foil because it well above the waterline as opposed to on a normal windsurfer, as pictured above.

jimbob SA
SA, 875 posts
Monday , 11 Jun 2018 9:04PM
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I'll be ordering one soon as they are available, 5.5 for me. I hate big gear with a passion. one sail option on my hover and then normal windsurf over 15 knots. Have used a older 97 ezzys 5.0 and 5.5 last summer ( after trying many later sails ) and it's been fantastic, knowing and meeting David and seeing how passionate he is can't wait to be on the water with his new sail.
Its not all racing and speed but getting out on light warm days with your wife and family and having fun again.
only Robby and Dave seen to get this.



Bought these new in 97 and still bloody good condition.


Paducah
68 posts
Tuesday , 12 Jun 2018 1:36AM
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Dave isn't the only one. Bruce Peterson has had a line of foil sails out for a year now and he's a pretty proficient foiler himself. Having used a cammed sail for foiling in light winds after using an Ezzy Cheetah for a year, I prefer his approach.



Bruce is on the yellow/red sail in this vid:


btw, I have huge respect for Dave Ezzy and what his sails do for the avg windsurfer - I own four. I'm just not convinced on this one, yet. I suspect that you could lose 30 cm off that foot batten and have no significant effect on the sail's behaviour.

RAL INN
VIC, 2442 posts
Thursday , 14 Jun 2018 11:10AM
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Loft sails seem to have their fingers on the foil sails as does Sailworks.
both have been at it a while.
For someone to be barely a year into foiling then come up with this radical approach seems like a rush to different rather than a serious study of what really works.

6 hours ago , 19 Jun 2018 10:57AM
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Paducah said..
Dave isn't the only one. Bruce Peterson has had a line of foil sails out for a year now and he's a pretty proficient foiler himself. Having used a cammed sail for foiling in light winds after using an Ezzy Cheetah for a year, I prefer his approach.



Bruce is on the yellow/red sail in this vid:


btw, I have huge respect for Dave Ezzy and what his sails do for the avg windsurfer - I own four. I'm just not convinced on this one, yet. I suspect that you could lose 30 cm off that foot batten and have no significant effect on the sail's behaviour.


I agree loosing 30cm off the batten might improve handling - adding cams will improve stability. The guys at Sailworks brought out the best qualities in the FLYER.



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"Ezzy Hydra" started by Paducah