Zworykin discovered the drone formula by coupling television with remote-controlled flight

Evidence

Coupling television with the remote-controlled plane, Zworykin had discovered the formula that, much later, would become that of both “smart bombs” and armed drones: remove from the plane any part of the pilot save an electronic retina, with the pilot’s actual body remaining elsewhere, out of range of the enemy antiair defenses. — Grégoire Chamayou, A Theory of the Drone, 317