New foil slalom board concept: AV foil Bokit

I have two foil boards, a Patrik Foil Race 145, and Severne Hydro 79. The Patrik is a very easy take off board, and friendly use for foil slalom with big sails. But the design of the shape make nervous at high speed (+28 knots), because the nose generate lift and it increases when I go fast. In the other hand the I have the Hydro. More difficult to take because of the cutouts, more long, more heavy, but with an amazing control at high speed, I thing thanks to the neutral design of the nose, and maybe the extra weight. Many times I break the barrier of 30 knots with this board with a perfect feeling of control.
And now I discover this model: www.avboards.com/bokit-foil-slalom-bx-carbon-racefoil/ and have all the qualities of the Severne (long simetrical nose) but and the sane time is light and look like very stable of the aerodinamic design of the shape. But very different of the concept of the other brands. What do you think about this brand and board? I'm thinking seriously to change my to boards to this new board.

Looks interesting! Lots of talk about aerodynamics and Americas cup but not a single word about CFD (Computational Fluid Dynamics). Time will tell.

Patrik makes a big step with the next generation: www.instagram.com/reel/DD-U936Ii2K/?igsh=eDhxZzVsNmJvbHJo

It seems that brand designers believe we don't need a planning shape. In the end, we are almost all the time in the air!

Still totally different approach : Patrick as almost everybody remains in the path of getting to foil take off speed by first getting the board to classic windsurf planing. Franck 'round hull' or displacement hull generates less drag at low speed, so you get faster slogging, and as soon as you're moving the foil generates some lift, not enough for take off, but some. The floatation line is thus lower and having a round hull, the wet surface diminish and is significantly narrower, thus generating even less drag. The idea is to get to a smoother acceleration with less sail power (smaller sail). So I would say that planning hull enables more abrupt take off requiring a more energetic take off. 'Round hull' concept enables smoother take off with less sail power, so smaller lighter sail, and once airborn, easier sail control and less drag from the sail at top speed.

Then there is the aerodynamic behavior at high speed. Foiling crosswind at speed 25kt and 20kt wind, apparent wind is about 28kt. Anyone that has carried a 70cm wide board in 28kt knows that wind effect can't be neglected. Now it is hard to tel what board shape gives the more stable in such situation.

And I thought the Starboard '25 85cm foil board was radical. Certainly gets up easier than past iterations.

Love these new designs! For me the most important, is slalom remains alive .

The concept of Exocet is similar to that of the latest foil slalom designs, with different ways to reduce the wetted surface during touchdowns:

exocet-original.com/windfoil/products/race-foil/rf-foil-v4-carbon-66e7dd9a2b74bd771c680031

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w100 said..
Chris/Peter shape Tribal Atmos feature a "middle way" hull and very thin rails.
The 85 takes off very smooth and friction free as soon as you're able to generate some boat speed.
When slogging you need to be used to stay in the deck center line to avoid rolling around (10 minutes training...)

[url=postimg.cc/YjXKktTr]

I just arrived back in WA & spent the whole weekend with Chris & the Tribal team at the Cervantes Windsurfing Challenge. I was the only Windfoiler there & they failed to mention this development to me ??
Maybe they they weren't impressed with my performances & could see it would be a complete waste of time even telling me ??
It was too windy for me to actually enter the races so just freefoiling ??

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AUS 808 said..

w100 said..
Chris/Peter shape Tribal Atmos feature a "middle way" hull and very thin rails.
The 85 takes off very smooth and friction free as soon as you're able to generate some boat speed.
When slogging you need to be used to stay in the deck center line to avoid rolling around (10 minutes training...)

[url=postimg.cc/YjXKktTr]

I just arrived back in WA & spent the whole weekend with Chris & the Tribal team at the Cervantes Windsurfing Challenge. I was the only Windfoiler there & they failed to mention this development to me ??
Maybe they they weren't impressed with my performances & could see it would be a complete waste of time even telling me ??
It was too windy for me to actually enter the races so just freefoiling ??

I almost took my foil kit, maybe next yr I will. Would have been ridiculously fun/hard out on the course but Stropp had a ball on the foil

The bevelled bottoms are nothing new. Did this back in 2018. Bit harder to get going but super smooth on touch downs.

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berowne said..
Hold my beer

New I-99 slalom