Abstract: A spray nozzle for mounting on an aircraft which controls droplet size comprises a bonnet section having a flexible diaphragm for permitting passage of spray material through a channel and outwardly through one of a plurality of selectively positionable orifices of varying cross-section for further passage through a flexible connection to a rotating cage assembly actuated by air flow impinging upon mounted fan blades for dispensing the spray material in relatively constant sized droplets for spreading over a large swath of crop terrain.