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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. No. 3985 is one of only two Challengers still in existence and the only one to have operated in excursion service.
The Union Pacific Challengers are a type of simple articulated 4-6-6-4 steam locomotive built by American Locomotive Company (ALCO) from 1936 to 1944 and operated by the Union Pacific Railroad until the late 1950s. A total of 105 Challengers were built in five classes. They were nearly 122 ft (37 m) long and weighed 537 short tons (487 tonnes).
UP 3985: a 4-6-6-4 "Challenger" class dual-service steam locomotive, operated in excursion service from 1981 to 2010 and was retired as of January 2020. Delivered in ...
Built as Oregon Railroad and Navigation Company 197, renumbered as UP 3203 and is being restored as 197. 3206: P-1 4-6-2 3977: June 1943 American Locomotive Company (ALCO) 4664-4 4-6-6-4: Static display Cody Park in North Platte, Nebraska: 3985: July 1943 American Locomotive Company (ALCO) 4664-4 4-6-6-4 Undergoing restoration to operational ...
Union Pacific Challenger No. 3985 is an example of a 4-6-6-4 locomotive. In the Whyte notation for classifying steam locomotives by wheel arrangement, a 4-6-6-4 is a railroad steam locomotive that has four leading wheels followed by two sets of six coupled driving wheels and four trailing wheels. 4-6-6-4's are commonly known as Challengers.
Union Pacific No. 119; Union Pacific 618; Union Pacific 737; Union Pacific 844; Union Pacific 1243; Union Pacific 1982; Union Pacific heritage fleet; Oregon Railroad and Navigation 197; Union Pacific 3985; Union Pacific Big Boy; Union Pacific 4012; Union Pacific 4014; Union Pacific 4023; Union Pacific 4141; Union Pacific 4466; Union Pacific ...
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In April 2022, Union Pacific announced that No. 5511 was among several pieces of equipment to be donated to Railroad Heritage of Midwest America (RRHMA) in Silvis, Illinois, with plans to rebuild No. 5511 for operational purposes once Challenger No. 3985 is rebuilt. As of September 2023, both the 3985 and 5511 are undergoing operational ...