DC electrical brush ( the electrical discharge off of copper wire) lifts the craft up.
Here is proof of concept showing DC levitation
[link to en.m.wikipedia.org (secure)]
AC electrical brush goes on the bottom of the craft to complete the magnetic flux circuit.
Here is a proof of concept showing alternating current levitating objects
[link to en.m.wikipedia.org (secure)]

So Tesla invented this in the early 1900s and even wrote New York Times articles about it.
Where people have gone wrong is not combining the AC/DC together in the same unit. This is because most people have never studied Aether. (Which is a discharge of electrical energy that is not visible to the human eye.) Aether is expanded by DC charge and compacted by AC charge.

THE biggest deception to the entire world and America was hiding the science of Aether. Which is a natural phenomenon of electrical discharge. Combining AC and DC current brush’ on the outside of a craft will nullify gravity via electricity.( primarily the capturing of Aether which flows through all objects unless those objects are surrounded in a AC/DC magnetic flux.