# UNION PACIFIC 4000 CLASS STEAM LOCOMOTIVES "BIG BOY AND HIS BROTHERS" FILM 51254

This silent documentary film "Big Boy and his Brothers" shows the big steam locomotives of the Union Pacific Railroad. Shot by Gene Miller primarily in western Nebraska, Wyoming and Colorado, this film gives a rare look at some of the largest locomotives ever built. It includes images of the 4-12-2s known as the "Union Pacifics" at 2:43 , the largest non-articulated locomotives at the time they were made, and featured 67-inch drivers. At 5:14 , a 4-6-6-4 Challenger type is seen, introduced in 1936. The 4-8-4 engines are shown starting at 8:24 , including the 800 series Nevada type that could pull 20 Pullman cars at 70 mph. At 12:17 , the 4-8-8-4 Big Boys are shown. "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. The Big Boy fleet of twenty five locomotives were used primarily in the Wyoming Division to haul freight over the Wasatch mountains between Green River, Wyoming and Ogden, Utah. They were the only locomotives to use a 4-8-8-4 wheel arrangement consisting of a four-wheel leading truck for stability entering curves, two sets of eight driving wheels and a four-wheel trailing truck to support the large firebox. According to a Union Pacific executive, the 4-8-8-4 series originally was to have been called "Wasatch". One day while one of the engines was being built an unknown worker scrawled "Big Boy" in…

- Kind: Film
- Genres: Industrial and advertising
- Archive: [Internet Archive](https://archive.org/details/51254BigBoyMos)
- Licence or status: none stated by the archive
- Who can watch: Tweens profiles and older (the archive gives no rating; placed by Invisible Network from its collection and subjects)

[Watch now](https://invisiblenetwork.ai/watch/archive/ia/51254BigBoyMos?play=1)