Pacing Big Boy #4014 In Colorado

Big Boy pacing action!

There were 25 Union Pacific “Big Boys” built overall beginning in 1941 for the specific purpose of hauling long freight trains over the prairies of southern Wyoming during World War II. Union Pacific wanted one locomotive with enough horse power so that they did not have to double or triple head with other steam locomotives to get the job done.

As seen here, Big Boy #4014 is also hauling commercial hopper cars as well as passenger cars with a diesel assist.

The diesel unit supplies current to power the train as well as acting as additional weight to help with stability at fast speeds.

Union Pacific Big Boys stats:

• Operated from 1941-59
• Bearing full load weighed a total of 1.2 million pounds
• Only 25 ever made
• 4-8-8-4 configuration
• Top speed of 80 Mph

Let us know if you have had the opportunity to view Big Boy up close. We would love to hear about your experience!