Here is a video of the prototype:

https://youtu.be/KXFbt_iXW6E

Slip ring

Original Project:

https://hackaday.io/project/169813-vertibird-redo

A slip ring is an electromechanical device that allows the transmission of power and electrical signals from a stationary to a rotating structure. A slip ring can be used in any electromechanical system that requires rotation while transmitting power or signals. It can improve mechanical performance, simplify system operation and eliminate damage-prone wires dangling from movable joints. Wikipedia