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Learn about the Union Pacific Big Boy, a type of 4-8-8-4 steam locomotive that hauled freight over the Wasatch Range from 1941 to 1962. Find out its history, specifications, preservation status and performance figures.
Learn about the 10 largest steam locomotives ever built according to their weights, from the Norfolk & Western Y-Class to the Big Boy. The XA Triplex, the only experimental triplex locomotive, was the second largest at 586 tons.
A comprehensive list of locomotives from different countries, eras and types, ranked by various criteria such as weight, power and tractive effort. Compare the specifications and images of the world's largest and most powerful steam, electric and diesel engines.
2-8-8-4 is a type of steam locomotive with two leading wheels, two sets of eight driving wheels, and a four-wheel trailing truck. Learn about the history, design, and performance of 2-8-8-4 engines built for four U.S. railroads and one outside the U.S.
Big Boy was a series of 4-8-8-4 articulated steam engines built by the American Locomotive Company for the Union Pacific Railroad from 1941 to 1944. They could haul 3,600-ton trains up a 1.55 percent grade in the Wasatch Mountains and reached 70 miles per hour on level track.
Learn about the legacy and operation of Union Pacific's steam fleet, including the world's largest steam locomotive, the Big Boy No. 4014. See the schedule, track the locomotives, and order souvenirs online.
Learn about the history and restoration of the Big Boy, the largest and most powerful steam locomotive ever built for Union Pacific Railroad. See photos, vital statistics, and compare it to a diesel locomotive or a Boeing 747.
Learn about the history and current locations of the eight surviving 'Big Boys', the most powerful steam locomotives in the world. See photos and maps of these rare and impressive machines that once hauled freight across the USA.
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...
Learn about the five steam locomotives that could pull the most weight and cargo in history, from the Yellowstone to the Erie Class P-1. See their horsepower, speed, tractive force, and design...