Source: Finally a video showing that axial flux motors serpentine the magnetic field between the external magnetic rotors … offset between the magnetic field conductive material pads that are not permanent magnets. Truly brilliant design. Bob Wilson
Back if envelope, 1/3d material and closer to 99%. Although the magnetic conductivity material was not described, I suspect little to no expensive rare earths. This is the best motor architecture since induction motors. Perfect for aviation. Bob Wilson