Union Pacific RR 4-8-8-4 No. 4006
Kirkwood, MO, United States
Location: National Museum of Transport
Status: Display
Posted: Jul 20, 2014 @ 04:07:26 by steve
bigboy weight is 1250.000 pounds loce and tender together thank you
Posted: Nov 17, 2005 @ 11:11:47 by nick

This big boy is also the in the worst physical condition of them all. I saw her firebox and it was rusted all the way through.Also shes missing alot of her cab parts that includes:2 stoker valves, bell and bell cord, whistle cord,speedometer and a whole lot more. so yes she is in good static condtion but in the worst physical condition


nick hoyt

Posted: Jun 10, 2004 @ 08:06:10 by Kikka

I think 4006 had the highest milege out of all the Big Boys.

The milege on 4006 was 1,064,625.



Posted: Jan 23, 2004 @ 17:01:51 by Greg Applegate
A friend loaned me their copy of "American Locomotives 1900-1950", by Edwin P. Alexander. It offers info such as: length over couplers: 132' 10" speeds to 80mph, continuous 70mph operation. 6000 drawbar hp at 45mph The Research and Mechanical Standards Department of the Union Pacific developed the design. Total weight (loco & tender I think): 1,208,750 lbs!