The 3kw 45mm magnet height motors I use (similar to mxus 3k) have a rotor made of about 8mm thick steel which is almost 6lbs without the 46 magnets and cover plates. On the outside of the ring I use aluminum Hubsinks.
How would a rotor made of aluminium or copper affect the motor properties?
How would a rotor made of aluminium or copper affect the motor properties?