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The Union Pacific Big Boy is a type of simple articulated 4-8-8-4 steam locomotive manufactured by the American Locomotive Company (ALCO) between 1941 and 1944 and operated by the Union Pacific Railroad in revenue service until 1962.
Union Pacific Railroad's 4014 "Big Boy" is the largest operational steam locomotive in the world. It was restored by the railroad in 2019 in celebration of t...
In this special episode, Jay Leno explores the world’s largest steam engine—the iconic Union Pacific "Big Boy." This 600-ton behemoth, originally built in 19...
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Westward Bound Tour. Earlier this summer, Union Pacific's legendary Big Boy No. 4014 toured in five states during its 2024 Westward Bound Tour from Wyoming to California. In addition, this mighty steam locomotive was on public display for two days each in Roseville, California and Ogden, Utah.
27 sie 2021 · READ THIS DESCRIPTION FIRST BEFORE COMMENTING:Union Pacific Steam Schedule: https://www.up.com/heritage/steam/schedule/index.htmNo. 4014 made a trip to Omaha...
The Big Boy was articulated like the Mallet locomotive design, although without compounding. [6] It was designed for stability at 80 miles per hour (130 km/h), allowing for a wide margin of reliability and safety, as steam locomotives normally operated well below that speed in freight service. [ 7 ]
During World War II Union Pacific operated some of the most modern and powerful steam locomotives ever built. Among them were the famous "Big Boys," the largest steam locomotives in the world. Working with them were the "800-class" high-speed passenger locomotives, as well as hundreds of older class steam engines.
