3/26/2025
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Home
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Union Pacific Railroad Company
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Locomotives
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Alco 4-6-6-4
> UP 3991
Pictures of UP 3991
Owner:
Union Pacific Railroad Company
Model:
Alco 4-6-6-4
Built As:
UP 3991 (4-6-6-4)
Serial Number:
70180
Order No:
S-1879
Frame Number:
21X32 cylinders, 69" drivers
Built:
6/1943
Notes:
Schenectady 06/1943, retired 03/1961
Other locos with this serial:
UP 3991(4-6-6-4)
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Title:
UP 4-6-6-4 #3991
Description:
The engineer in the cab window is dwarfed by the massive 4-6-6-4 Challenger type steam locomotive stretching in front of him. History - Alco-Schenectady, 6/1943, serial #70180.After almost 18 years of service, the loco was "vacated" March of 1961. Specs - 69" drivers, impressive 280 psi boiler pressure, four 21x32" cylinders, engine weight of 633,500 lb and tractive effort of 97,350 lb. The phot is by Glenn H. Davis.
Photo Date:
7/28/1954
Upload Date:
2/26/2025 5:57:13 PM
Location:
North Platte, NE
Author:
Gary Everhart
Categories:
Roster,Steam,Action
Locomotives:
UP 3991(4-6-6-4)
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26
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