Cales de réglages S-Foil SROKA G10


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Cales de réglages S-Foil SROKA

Cet ensemble de cales produites en G10 permet de varier l’angle du stabilisateur du S-Foil. Cette variation d’angle permet d’augmenter la plage d’utilisation du S-Foil. Ces cales de réglage du  S-Foil SROKA  viennent s’interposer entre le fuselage et le stabilisateur. Si vous utilisez les stabilisateurs recommandés, vous n’aurez pas besoin de cales de réglage, sauf si vous cherchez à customiser et à régler plus précisément votre stabilisateur pour être plus équilibré ou aller plus vite.

Nous vous proposons un petit coffret avec 8 cales avec des angles différents.

  • + et – 0,25°
  • + et – 0,5°
  • + et – 1°
  • + et – 2°

Ce qui permet de régler de plus + 3,75° à -3,75 ° avec une précision tous les 0,25°


Do you need an adjustment shim?

To begin with, you should know that with each foil we offer, we recommend a stabiliser adapted to your size and level. For example, with the 1350 Lift, a 95 kg weight will find it easier to use the 300 cm2 stabiliser, whereas a 60 kg weight will use the 180 cm2 stabiliser. If you follow our recommendations, there is no need to use shims.

If the 95 kg model wants to go faster and increase its manoeuvrability by using a 180 stabiliser, this is possible. However, as the stabiliser has not been designed for this type of size, it will lose longitudinal stability. It will be necessary to use an adjustment wedge (positive angle (back of the wedge thicker than the front)) to recover a perfect longitudinal stability.

What is the purpose of the shims?

To understand the principle of a trim tab, you must first understand how the stabiliser works. In order to stabilise, the foil must be braked to a greater or lesser extent. The two main parameters for braking a foil are increasing the surface area of the stabilizer and increasing the angle of the rear fin.

Depending on your speed, your technical level/weight and your foil, your balance on the foil is not the same. Therefore, you have to adjust the angle of the stabilizer to get a perfect balance.
The few shims available on the market are made of injection moulded plastic, aluminium or 3D printer.

We have developed shims in G10 to have the maximum precision with the maximum finesse. G10 is a very dense material that is highly resistant to crushing (10 layers of fibreglass pressurised to make a single thickness). It is insulating, can be machined very finely, and does not compress). It’s a nice part that brings a real plus in the precision of the adjustments while keeping the same rigidity.

The g10 wedge is positioned between the stabiliser and the fuselage. It is simple and easy to use.

Which shims for which stabilizers?

  • The 300 cm2 is the standard stabiliser and it already has a (positive) angle to make the foil plug and play and usable without question. So there is no need to use positive shims with this stab. However, you can improve the overall speed of a foil using this stabiliser by using negative shims. That is, shims with the front thicker than the rear. This reduces the drag, which increases the speed of the foil.
  • With the 240 stab you can use a little negative shimming to reduce the angle, which can be useful with the 950 Speed if you are light or on the future 670 cm2 and some models like the 1350 Lift. For heavier riders, you can get more lift by using positive shims.
  • Finally, with the stab in 180, you can only use the positive shims to increase its lift. (its angle being already neutral)
Solving a problem: The goal in sailing is to have the same pressure on both legs. If you have too much pressure on the front leg, i.e. the foil is only going up, then you need to reduce the angle of the stabiliser by using a negative wedge (thicker edge in front than behind). If you find your foil too unstable in the longitudinal axis, or the foil tends to dive forward, you can angle your stabiliser by using a positive wedge (thicker edge in the back than in the front) before trying to change the position of the mast on the rails. Customise your experience: If your aim is to go faster, you should reduce drag by reducing the angle of the stabiliser. The 240 and 180 stabilisers already have a very small angle. If you have the 300 stabilizer, you can reduce its angle (with a negative shim) to gain some speed without having to change stabilizers. The influence of the fuselage on stability: The longer the fuselage, the more stable the foil is longitudinally, so you can afford to reduce the angle or size of the stabilizer to gain speed. Conversely, the shorter the fuselage, the less stable the foil. You can therefore add more angle to gain stability. How do you test on the water? Once you have chosen the type of wedge you want, test them directly with +1°, and then adjust as you see fit in 0.25 degree increments.

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