Best-known for its use in Formula 1, KERS (Kinetic Energy Recovery System) is heading for the slopes as Head incorporate it as a performance-enhancer into their skis next season.
So how does it work? Piezoelectric fibres positioned behind the binding transform mechanical impulses into electrical energy, which is stored in a microchip. The chip releases this stored energy to the ski right when it’s needed, controlled by a special sensor which is pre-programmed according to the particular flex patterns of the ski model.
Influenced by the length of the ski, weight of the skier and speed of travel, a ski is in maximum flex towards the end of the turn. In the area where the ski flexes the most, the microchip sensor is activated, releasing the energy to the piezoelectric fibres. This in turn stiffens the tail, leading to a rebound that gives maximum acceleration at the end of the turn, accelerating the racer from one turn to the next.