Union Pacific 3985 is a four-cylinder simple articulated 4-6-6-4 "Challenger"-type steam locomotive built in July 1943 by the American Locomotive Company (ALCO) of Schenectady, New York, for the Union Pacific Railroad.

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Union Pacific Steam Locomotive 3985 pulling the Ringling Brother's and Barnum & Bailey circus cars through Greeley, CO...more.

Watch UP Challenger 4-6-6-4 #3985, the largest operational steam locomotive in the world, pull Ringling's Blue Unit to Denver on UP's Greeley Subdivision. Per UP's website: "History was...

Duty for pulling this massive train was turned over to the world's largest operational steam locomotive -- Union Pacific Challenger #3985. The Ringling/UP train, for now, remains the longest and heaviest train pulled by a steam locomotive in the 21st century.

The Ultimate Circus Train Sept 28, 2010 Union Pacific Challenger Steam Locomotive 3985. Union Pacific 3985 was built in 1943 by ALCo in Schenectady, New York. The locomotive was one of 105 articulated 4-6-6-4 Challenger-type locomotives …

Dec 4, 2014 · Originally a coal burner, the UP volunteers converted the locomotive from coal burning to oil in order to avoid the sparks and fire danger that coal produced along side the tracks. Quick Facts. Rail Line: Union Pacific; Train Name: UP Steam Locomotive 3985; Power type: 4-6-6-4 Steam Locomotive; Builder: American Locomotive Company; Train type ...

Union Pacific Railroad No. 3985, also known as ' The Challenger ', is a 4664-4 class 4-6-6-4 "Challenger" type articulated steam locomotive built by the American Locomotive Company (ALCO) in July 1943.

Worlds Largest Steam Locomotive pulling the 65 car Ringling Brothers & Barnum & Bailey Circus Train. The Steam Locomotive is 122 Feet long and weighs 1 million pounds. The entire train is 6,100...

Like many, I took today off from work to shoot the UP 3985 and the Circus Train. Having seen the chaos that results from these special moves, I picked a spot near the north switch of Platteville and let the train come to me.