My grandfather designed and flew drones for Northrop in the 70s and 80s. They were used for target practice (US or foreign military would shoot at them). He f

My grandfather designed and flew drones for Northrop in the 70s and 80s. They were used for target practice (US or foreign military would shoot at them). He flew them by adjusting oscilloscopes and he had a plotter on a map to show where the plane was.