UP Challenger 3985 Blows Her Steam!

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UP Challenger 3985 Blows Her Steam! | Train Fanatics Videos
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Union Pacific’s 3985 Challenger Class is a beast!

While leaving the yard behind the Kansas City Union Station in Missouri, UP 3985 is headed out on an excursion pulling the Missouri River Eagle special back in 2010.

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UP 3985 has arguably one the most distinctive and throaty whistles of any steam engine including Big Boy!

Built specifically to take on long grades like her cousin “Big Boy”, the #3985 Challenger was designed to pull freight fast up long grades without helper engines.

Some quick facts about the UP #3985 Challenger

  • Builder – American Locomotive Works – 1943
  • Wheel configuration – 4-6-6-4
  • Locomotive and tender weight – 1,073,900 lbs
  • Tractive effort – 97,350 lbf
  • Nicknamed – Challenger

Let us know if you have ever had a chance to see UP #3985 in action! We would love to hear about your experience!

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