Conveying air (17), which is supplied via an annular nozzle (7), increases the projection range of the powder-air mixture (16).

They distribute the water inside a circle with a radius equal to the range of the spray.

To avoid loss through friction, to increase the jet range and to reduce manufacturing costs, the duct is made out of a flexible, pliable hose (12).

In the steady case the fill level, and thus the width of the jet, remains constant (e.g. discharge under a weir).

The throw range, particularly with the version mounted on arms, will be a plus for production on the very wide tracks of l’Alpe d'Huez.