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Reply to "Williams 4000 Hudson (cab 5405) Does this have a smoke unit?"

I know the old Williams draw a lot of power, I never figured out what the reason was, just knew it wasn't going to work with the command upgrades.  I dropped in a Mabuchi 555 into a couple of them, simply because it was a bolt-in fit, and it was a much better motor.  Not a Pittman, but easier to fit.  The Pittman would have required new mounting holes and drilling out the flywheel for the larger shaft, something that I wasn't keen on doing.   The specific 555 motors I was using had an 8,000 RPM top end, which for the 44:1 gearbox ended up being about 43 scale MPH.

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