with a preferred embodiment of the present invention being assembled from a coil 48 which is the cylinder assembly described above a commutator 50 and a disk shaped flywheel 57 the flywheel 57 can be provided with a circular central opening 60 for fitting a shaft 59 and 61 fig8 and is preferably made from high strength aluminum the flywheel 57 can be anodized on its exterior surface to create a consistent electrical insulation layer over the outer surface the flywheel 57 should be capable of current and voltage isolation via a non conductive anodized coating and yet have high thermal mass heat transfer characteristics and stiffness to transmit torque and securely fix the shaft 59 and 61 the diameter of flywheel 57 should be a line to line fit with the diameter of the inner cylinder 42 to allow snug fit of the flywheel inside the inner cylinder 42 when the flywheel is subsequently pressed into one end of the inner cylinder 42 other materials such as ceramic high strength glass and the like make be employed to manufacture the flywheel again the order of assembly of the described embodiment of the armature is to first press fit flywheel 57 into one of the open ends of coil 48 fig7 next the commutator 50 tabs.