How does it work?

Using the natural power of a river, the system enables you to enjoy surfing together with your friends. The idea is to divert a river’s flow by a pulley and an underwater sail to accelerate the surfer. And this is how it works:

The system consists out of three parts a sail, a pulley and a rope connecting the surfer and the sail and requires minimum two persons. The pulley needs to be attached to a fix point (e.g. a bridge). Once in the water, the surfer drifts downstream and the sail on the other end of the rope gets dragged upstream towards the pulley.

Since the sail floats on the river’s surface due to air pockets on it’s one end a certain resistance against the river’s flow gets build once the second person steps on the other end of the sail (no air pockets) and pushes it against the river’s current. Now the surfer accelerates and is able to surf, since the current pushes the underwater sail downstream and the pulley diverts the river’s energy.