roto thicknes as relates flux pattern

[johnyb]

hello all,

when it comes to the gause pattern is directly related to the thickness  of the rotor ? If it is, most  rotors i see  on the site are brake rotors w/ usually 2x 1x 1/2 mags the rotor allthougth every bit 1 1/4 to 1 3/4 thick. Which is more like 1/4" were magnets attached  3/4 " to 1" ribs and 1/4 "to 3/8" outside of rotor. is it better to more closly match the thickness of the  rotor with magnet were it is attached to the rotor ie 1/2 mag 1/2 " solid rotor any difference in performance just a thought.

[electrondady1]

you could certainly use 1/2"thick rotors with 1/2" thick mags

 it has been found that 1/4" mild steel is sufficient to  carry the flux

from one mag  to the next.

thicker mags require thicker rotors

[johnyb]

does going lets say under a 1/4 "  thick for 1/2" thick mags cause problems w/ the flux field or more a warping of the rotor issue because mag pull strength and maybe i"am thinking to hard on this just thinking efficiency