If this works via induction could you even eliminate the need for the drones to land?
Assuming flight conditions are good, there would be a region around the wire (line of charge) with an electric/magnetic field that the drones could use, any shielding notwithstanding.
Assuming flight conditions are good, there would be a region around the wire (line of charge) with an electric/magnetic field that the drones could use, any shielding notwithstanding.