Contra-rotating homopolar motor-generator for energy storage and return

DETAILED DESCRIPTION An apparatus for receiving electric energy, storing it as rotating mechanical energy and converting it to electrical energy with magnitudes of the order of 1000 megajoules cycled in one second comprises a sequence of electrically conductive rotating coaxial cylindrical shells separated radially by electrically insulating stationary coaxial cylindrical shells.
Adjacent coaxial conducting shells are connected electrically by brushes at their ends in an alternating pattern and a radially directed magnetic field is caused to pass through the cylinders.
Air bearings in the nonconducting cylindrical shells ease motion of the conducting shells and the resulting forces on the application of a voltage to the inner and outer concentric shells is a sequence of alternately counter-rotating cylindrical shells that store most of the applied electrical energy as mechanical energy of rotation.