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RailKing U.P. 49er Operating Manual
RAILKING
O-27 OPERATION
While the U.P. 49er engine is more than capable of operating on O-27
curves and switches, you may find that certain light freight cars are prone to
derailing when being pulled or pushed by the U.P. 49er through O-27
switches. Should this occur, we suggest adding weight to the cars making
them heavier and less likely to derail.