Crop dusting

• The Yamaha RMAX heli UAV crop-duster in Japan has been the pioneer here, developed in the 90's for extremely low-altitude spraying in an urban-agricultural patchwork

• Gizmag article
• The RMAX Helicopter UAV - Akira Sato, Yamaha Motor Company
• Barnard Microsystems RMAX
• Yamaha RMAX Crash - Killed a person RCUniverse post