You are right, plus this is an absurd over-sized gadget. I doubt you could pack it into an aircraft carrier that easily. And if you did get it off to its 'humanitarian military duties' imagine, trundling along a road, taking up both carriageways, I am sure that a few kids with rocks could disable those rotors if the telegraph poles don't get there first. It has no real application hence it is a military 'maybe we need one of these too' gadgets.