Reply to "UP 4014 Latest UP info added 1-31-14"

ironlake2OGR Forum Member

It only gets to 163,000 and that is the simple mode and could not supply enough steam to go very fast. Big boy is the only 4-8-8-4 and that is the biggest wheel arrangement of a steamer that could operate at 70 mph y6b maybe but in compound mode only and then tractive effort is way down.

1/11/144:27 PM

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