Big Boy #4014 Shows Off Articulated Design

Big Boy #4014 Shows Off Articulated Design | Train Fanatics Videos

Union Pacific Big Boy #4014 visits St Louis, Missouri.

Big Boy #4014 was designed as an articulated locomotive for tight curves. The curve shown here pushes the limits on how tight the curve can be without slipping off of the rails.

The articulated locomotive has the front boiler sitting on a front pilot wheeled truck that allows the otherwise ridged boiler to pivot around curves that would normally be too tight.

Some Union Pacific Big Boy stats:

  1. Operated from 1941-59
  2. Bearing full load weighed a total of 1.2 million pounds
  3. Only 25 ever made
  4. 4-8-8-4 configuration
  5. 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!