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Reply to "Big Boy #4014 moves under power for the first time in over 50 years • The UP is bringing out the 4014, see schedule 🚂"

John Mills posted:

I thought there was talk of them doubleheading 844 and 4014.  Has that been ruled out?  if they did doublehead would a diesel still be necessary; if nothing else for braking?

Why would you even think about a need for another engine for braking.  A Big Boy has the pump and air resevoir capacity for braking long freight trains down Sherman Hill.

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