If you like to accessorize your model with working radar this place has micro size motors. I have two of them in my Marlin and I use them in my surface boats for the radar units. They are about 1/4" x 1". They run on 2.5v - 5v. Something like 45 rpm. I originally bought them from a web site called Gizmozone which is no longer active. They mention these motors were previously available from Gizmozone. You can't get much smaller than this for that low rpm.
Other motors
Other motors
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