Now remember, this force is only being generated during the upswing of the masses, so during the downswing, no force is generated. In effect, this will cause the whole assembly to jump up and down like a jackhammer. To solve this problem and create a steady force, we will need to add a second counter-rotating assembly 180 degrees out of phase with the first. This way, when one set of masses is on their upswing, the others are on their downswing. Finally, all we need is a motor to turn the arms and masses.
Problem is motors are heavy and bulky, and fig.
14 looks neither. Luckily, there's a technology presently available that reduces the size and weight of electric motors considerably. This technology is called SMES for Superconducting Magnetic Energy Storage. SMES stores electrical energy in the form of a magnetic field which is useful as long as its superconducting windings are kept at the temperature of liquid nitrogen. By integrating superconducting switches called Josephson Junctions into the circutry, we can sequentially energize different coils to turn the masses.