Reply to "Can you put a flywheel motor in a conventional engine that has no flyweel motors in it?"

The first Williams Trainmasters came with Pittman motors and no flywheels. They are good runners, pull well, and will creep along at slow speeds quite well.  I recently added an early TMCC DC-LCRU board and the loco still runs good at any speed above a creep. It's low speed ability to creep along is ok but not as good as before. It will still go very slow but has some slight jerkiness about it.   These Pittman motors have seven poles and I can imagine that if they were three pole motors the slight jerkiness at creeping speeds would be a much more pronounced jerkiness. Probably not acceptable to most people.