loud GE DW motor
i haven't heard an older GE DW for a while,but my grandma had a rollout one
from around 1972-it's motor was quite noisy,lots of "magnetic"whirring and
fan noise as the inherently inefficient shaded pole motor needed an
oversized cooling fan to prevent overheating VS a split phase motor that
usually only needs little fins on the rotor to cool.Sometime around 1981 or
so the GE motor was redesigned(still shaded pole)and the large stamped
metal fan was switched to a smaller "squirrel cage"on the motor shaft.
two pole Shaded pole motors usually run at around 3000 rpm while two pole
split phase motors run at 3450 rpm,split capacitor motors spin just a little
slower-around 3350-3400 rpm.
With split phase motors,the start winding is supposed to be inactive when
motor is at speed-switched out by a centrifugal switch(like my '74 KA)or
a current relay-most other DW (and filter flo washers)