Air-borne device for spraying agricultural land e.g. with water and fertiliser

摘要

The device e.g. airship is filled with a non-combustible gas, especially helium. The container is of aluminium and/or heat-resistant plastics and is arranged within the lower half of the airship. It is divided into a number of chambers. For applying the spraying medium pipe conduits are provided, distributed over the complete length and width of the airship, to which are fitted a number of spray nozzles. The spraying medium is fed to the nozzles via controllable valves. These valves are magnet type controllable separately from one another. Their functions are remotely controlled by radio. The container is filled with different spraying media and, by control of the valves, differing mixture ratios are producible between the sprayed media.