At the heart of their system is a multicopter drone, rigged with a custom-built Faraday cage (an enclosure used to block some electromagnetic ... The drone is connected via a pulley to a winch ...

I read an article in Mother Earth News by a self-professed electrician who swapped the blades of a lawn mower with a pulley and belt and used this homespun system to power a 12-volt car alternator ...