How to choose your windfoil ?

Antonin
March 24, 2021
Windfoil

Contents

Once you’ve got your foil, your board, there’s the question of sailing? What to choose? Cambers ? Without cambers? Large or small surface? It will depend on your ambitions: race/power or lightness/ease.

Sail with or without cambers

Cambers provide power and stability in the high rpm range. However, this also means heavier sails. The greater weight means you need more wind and speed before taking off with a foil. A sail without cambers will be much lighter and more flexible. It offers more dynamism to take off and fly easily. On the other hand, it will deliver less apparent wind at low speeds, making it slower in this area. For high speeds, a sail without cambers will need to be fairly rigid with a taut leech to be effective. With or without cambers, you’ll want to choose a sail that’s slim rather than compact. Indeed, a large and flexible head could create movement which would be reflected in instability on the foil (pendulum effect).

Making the right choice of sail surface

It’s all about weight. The smaller the glider, the lighter it will be, so the sooner you can take off and fly. Conversely, the larger the sail, the more weight it will carry, so you’ll need more wind to fly. However, once airborne, a larger surface area will bring more apparent wind and therefore speed. The more sail area we put on a small, low-volume float, the more wind we need to lift off the water.

Read our complete guide to getting started with windfoil.

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