F2FX formula

I think pumping technique helps the most for light wind foiling, pumping both the sail and the foil.

You did not say what size wing you chose. Select offers 769, 866, and 1050 cm2 wings. Their wings have a very high aspect ratio. Excellent for speed, but quite touchy when flying slowly.

For windfoiling, the board size and shape matter only for overall float for uphauling and turning when not in flight. When in flight, the board is just a platform to stand on. Also, we have to remember that even when you are slogging forward at sub-flight speeds, the wing is already lifting. This makes the board light and easy to pump to go faster and begin flight. My old formula board has a LOT of nose rocker that makes it very difficult to pump with a fin. With the foil lifting from below, it is easy to pump.

If you are looking to improve light wind foiling, your first issue to solve is the surface area of your wing. After that, you solve sail size. After that, you solve board size and shape. In that order.

Hello,
I know the starter of this topic, we foil at the same lake here in belgium.

I also sail a 90 cm wide jp lightwind board
with foil but my fuselage is 115cm. Front wing 800 . I think that a longer fuselage would be for him also the solution for earlyer flights below 10kn of wind.
Longer fuselage gives more lift and stability, at least thats what i figured out from different sources like a specialised shop in holland, groups like windfoil new zealand and others.

I dont have so much expierince with foiling but it works for me really good, i lift in 8kn wind.

Our weight is not so much different.



Thanks

I just checked the select website and next to the 1000 wing and next to "for riders between 80 and 115 kg" it says in all caps and red font "ultra light wind". I am pretty sure they mean ultra light wind regardless of your weight (of course, unless you are an extremely light person!)

I used a gun sails 8.6m GSR 2016 model but that RIG is heavy.

Your board is too big for your sail. I'm 93Kg, so not really the same, but with 900 wing and 7.0 I can fly in 7-8 knots with a 85 wide JP135 foilboard. With the formula and 7.0, everything else the same, I need at least 11 knots because the kit is not balanced (and with a 4.6 and 70 wide foilboard, same 900 foil I fly in 11 knots of wind aswell because that kit is balanced!). A formula should be used with 9.0 minimum if you want to unlock the boards light wind potential. If you ride smaller as a biggest sail you should ideally use a smaller board. Ofcourse other things like ease of uphauling and budget come into play so its a decision you must make yourself. I'd recommend a smaller board if the sole criteria was early planing with a 7.0.

This is because exactly as you say, the board sticks / drags. A bigger board sticks / drags more than a smaller board, thats why most recent foilboards get massive cutouts, but also why a bigger board just plain needs a bigger sail to get going. There is more drag and therefore more power is needed to unstick the board.

Wings are interchangable, and not (solely) dependent on your weight, you should be able to use a 900 or 1000 wing, just in less wind than I (93Kg remember?) would. Maybe they recommend those sizes as average size or something like that?

For now I'd say try the 1000 wing, if that doesnt do it for you, exchange your board for a smaller one.

In general you will notice that a longer fuselage works with a smaller stab. That's because there is a longer moment arm, so a smaller stab can still do its job. People who have tried the Starboard 330 stab with the 115cm fuselage find it impossible, so they go back to the 255 stab. The 330 is for the shorter fuselage.

Are there any persons who have select hdyro foils on the forum here ?