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concave deck - how much is to much?

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jaros
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concave deck - how much is to much?

Postby jaros » Sun Aug 27, 2017 3:32 pm

How much concave do some hydrofoil boards have on the deck? Like Ketos pocket boards (they call it spatula)?
I am building a board right now and I have to decide how much concave to put in the deck...
Thank you!

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Starsky
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Re: concave deck - how much is to much?

Postby Starsky » Sun Aug 27, 2017 5:31 pm

Likely pretty personal.

Concave definitely helps with the feel of board response, but a concave surface underfoot is eventually a stressor on foot mechanics. Too much and you will get internal rotation of the tibia and eventually stress at foot, ankle, and knee.
Last edited by Starsky on Sun Aug 27, 2017 5:42 pm, edited 1 time in total.

Blackrat
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Re: concave deck - how much is to much?

Postby Blackrat » Sun Aug 27, 2017 5:40 pm

Just to be clear ....

You talking about concave and not rocker ?

Concave , I've never had a board with concave , mine have 5-10mm convex ... But I would like to try it just for feel

jaros
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Re: concave deck - how much is to much?

Postby jaros » Sun Aug 27, 2017 5:48 pm

Concave (not rocker!), like on the photo:
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handy
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Re: concave deck - how much is to much?

Postby handy » Sun Aug 27, 2017 5:56 pm

this board with a width of 36.5 cm has a concave of 18mm under the front foot, under the rear the deck is flat.
The first board i made for that guy had 12mm concave with 37.5 cm with.
RaceFoilKari.jpg

tswierkocki
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Re: concave deck - how much is to much?

Postby tswierkocki » Mon Aug 28, 2017 2:09 am

The deck on my Nobile Skim Foil is concave under the front foot (1/4" / 6mm) and flat under the rear foot. I really like the feel of this deck for foiling.

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lovethepirk
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Re: concave deck - how much is to much?

Postby lovethepirk » Mon Aug 28, 2017 3:54 am

I have a domed board and I'm not a fan of it at all. I watched Gunner's video where it seems he likes a flat board, or a concave board for strapless. I can't comment on why he likes concave for strapless, but maybe he can chime in. I like the board I'm on for simply riding, but any freestyle stuff I'm struggling. I can nail all types of front rolls with my TT, but I'm coming out of my straps almost every time on the domed foil board and I never have this problem on my TT. There's one last thing I'm gonna try on the foil to keep the feet in the straps, but beyond that I'm gonna try a friends board that is concave and see if that helps b/c he nails them easily.

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Re: concave deck - how much is to much?

Postby windmaker » Mon Aug 28, 2017 5:05 am

Yes definitely personal, I prefer completely flat deck or flat on the front foot with little concave (5mm) on the back foot. Had a board with a lot of concave on the front (10mm) and it felt uncomfortable.

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Re: concave deck - how much is to much?

Postby Frank Rosin » Mon Aug 28, 2017 10:31 am

Personally prefer flat decks.
Also a lot easier to switch from board to board if both/all are flat.

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Frank
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Peter_Frank
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Re: concave deck - how much is to much?

Postby Peter_Frank » Mon Aug 28, 2017 10:38 am

jaros wrote:
Sun Aug 27, 2017 3:32 pm
How much concave do some hydrofoil boards have on the deck? Like Ketos pocket boards (they call it spatula)?
I am building a board right now and I have to decide how much concave to put in the deck...
Thank you!

Ketos Pocket boards do not have concave decks, they are flat.

The term spatula must be something either lost in the English translation I think, as in French they refer to the width at the widest point, or if anything it means "flat like a spatula" and not "concave" in both languages :D

I have both the Pocket 118 and 130, and both are flat, which is great IMO, dont like concave either.

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