A foil is generally made up of vertical and horizontal foil sections, which replace the traditional rudder and daggerboard.
⽔翼通常由垂直和⽔平的⽔翼部分组成,⽤以替代传统的舵和中插板。
As the boat speed increases, pressure builds on the foils, and a lifting force is created, similar to an aeroplane wing. This lift brings the boat out of the water, reducing drag and greatly increasing the speed of the boat.