Union Pacific Big Boy
Sign in to saveAlso known as Union Pacific 4000 class, Big Boy
class of 25 simple articulated 4-8-8-4 locomotives
Wikidata facts
- Subclass of
- tender locomotive
- Country
- United States
- Operator
- Union Pacific Railroad
- Country of origin
- United States
- Manufacturer
- American Locomotive Company
- Image
- UP Big Boy 4014.jpg
- Length
- 40470
- Speed
- 130
Show 11 more facts
- Commons category
- Union Pacific Big Boy
- track gauge
- standard-gauge railway
- total produced
- 25
- service entry
- 1941-00-00
- service retirement
- 1959-07-00
- number of cylinders
- 4
- fleet or registration number
- 4000–4024
- serial number
- 69571–69590, 72777–72781
- quantity
- 25
- start time
- 1941-00-00
- end time
- 1944-00-00
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On the map
8 mapped locations