The absolute size of the worlds biggest Steam Engines - UP "Big Boys"
Union Pacific’s Big Boy Locomotive - World’s Largest and Most Powerful Steam Train
How a Steam Locomotive Works (Union Pacific "Big Boy")
Union Pacific Big Boy #4014 Steam Train Accelerating and Sanding Flues (8/27/21)
Just How Big An Ol' Boy is "Big Boy", the Steam Locomotive?
Cheyenne, Wyoming - Big Boy #4004, Steam Engine #1242 and more static train displays
What is the Union Pacific Big Boy - Steam Culture
Union Pacific's "Big Boy" No. 4014 Steam Locomotive at FULL Throttle! Turn Volume UP! #bigboy #4014
The largest Steam Locomotive Still Running, The Big Boy #4014
Steam Train #trains #park #engines #coal #enthusiast
The Largest Steam Locomotive on Earth!
Big Boy No. 4014 At Our Colorado Location #bigboy #historical #locomotive
"Big Boy" #4014 test run June 05, 2023 from steam shop, to Borie, backing to Speer then home again
How A Steam Engine Works
Union Pacific's Big Boy Steam Train!
Union Pacific “Big Boy” No. 4014 crossing Lake Houston
Big Boy No 4014 Augusta Wisconsin July 24, 2019
"Big Boy" #4014 steam locomotive - 75 locomotive cropped moving action video clips.
Big Boy No. 4014 - Union Pacific
Union Pacific 'Big Boy' #4005 Live Steam 7.25" Gauge Locomotive in New Zealand
