They weren't. The crop dusting was done under manual control. Around 2005, you could semi-easily get a flight control unit to put on the research version. Ad

They weren't. The crop dusting was done under manual control. Around 2005, you could semi-easily get a flight control unit to put on the research version. Add a laser scanning system and direct the system to fly into a building... from flights back around 2006-ish: https://www.youtube.com/watch?v=Skdh4Nwm6r4 https://www.youtube.com/watch?v=Skdh4Nwm6r4