Originally Posted by bertrandsv87

E=mc2....
The strongest magnet vs the heaviest magnet.....
The stronger magnet reducing rpm might not produce as much power as a heavier but weaker magnet that runs at a much higher rpm... It is all about increasing the stored energy in the rotor through a compromise between mass(shaft+magnet) and high enough rpm(ideal gauss level) in a motor that is built right at the current Roar limits....