Abstract: An apparatus for spraying liquids from a vehicle, suitably an aircraft or other airborne vehicle. The apparatus includes at least two sprayheads, each having adjacent thereto an associated electrode or an associated electrically conducting or semiconducting part of the vehicle. A generator applies potentials to the sprayheads and to the electrodes or conducting or semiconducting parts of the vehicle so that an intense electrical field is developed between the liquid which emerges from each sprayhead and the adjacent electrode or part. The intensity of each field is sufficient to atomise the emerging liquid. The polarities of the applied potentials are such that liquid emerging from one sprayhead is charged positively while liquid emerging from the other sprayhead is charged negatively.

Abstract: A stabilization system for hover vehicles, for example free-flying or cable-controlled helicopters or ducted fan vehicles. The system includes at least one downwardly directed sensor which generates a signal representing the distance from the ground of a predetermined location on the vehicle. The signal from one or more sensors is used to control the height of the vehicle above the ground. Signal from a pair of sensors are used to control the attitude of the vehicle relative to the ground.