1941: The Largest Steam Locomotive Ever Built, the Big Boy, Went Into Service
for Union Pacific Railroad
Page by Bob Leathers
Click on the link below to watch a film about the history of the Union Pacific Railroad steam engines. If you like steam engines, you will enjoy this film.
Film: Last Of The Giants 71522
A tribute to the "Big Boy" locomotives produced by Union Pacific, "Last of the Giants" shows the end of a memorable era in Western Railroading. The "Big Boy" is the popular name of the American Locomotive Company 4000-class 4-8-8-4 articulated, coal-fired, steam locomotives manufactured between 1941 and 1944 and operated by the Union Pacific Railroad until 1959. (Archive.org)