If you could build a drone perfectly shielded with sheet steel it would be the size of a Cessna and have the radar cross section of a B-52. The perfectly shield

If you could build a drone perfectly shielded with sheet steel it would be the size of a Cessna and have the radar cross section of a B-52. The perfectly shielded drone would no longer be fit for purpose. It couldn't sneakily fly over enemy lines to spy or drop bombs or whatever. A steel sheet covered drones would just get blasted by traditional AAA.