A few miles east of Hanna, WY and the UP 844 is shooting out a bit of black smoke. The diesel on the train is UP 7813. It is an ES44AC delivered to UP a little over a year earlier. It's dynamic brakes are used when proceeding down a grade so the train doesn't have to rely entirely on air brakes. It also serves as a back up (for power) in the event the UP 844 become unable to continue on.
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Posted By Webmaster On Tuesday, April 14, 2009 At 12:55:55 AM (PT)
That's a fantastic point Tim. Makes a lot of sense. I'm sure you are correct. In fact, thinking back to Saturday, I'm pretty sure I heard UP 7813 in dynamics a couple of times!
Posted By Tim Petrishen On Monday, April 13, 2009 At 7:51:54 PM (PT)
I think if you check with the Steam team in Cheyenne that they will tell you that the diesel is there more for its dynamic brakes than as back-up power.
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