Specifications [ 4-8-8-4 (Big Boy) ]
American Locomotive Company (ALCO) - USA
Builder
United States
Origin
1941 - 1944
Production Run
25 units
Production Total
front-right
Driver Position
26.0m | 85.3 ft
Length
NOTE: May include length of entire train set
345,637 kg
(762,130 lb | 381 US Tons)
Weight
Steam
Power Source
Coal-fed steam-based engine.
Engine / Drive Source
7,000 hp
Rated Output Power
97.0 kph
(60.3 mph)
Max Speed
Wheel Arrangement
(Loco Facing Left)
Cab Signals
Safety Systems
Series Variants
4-8-8-4 (Big Boy) - Base Series Name.
Class 4884-1 - First batch of twenty locos in 1941.
Class 4884-2 - Second batch of five locos in 1944.
Operating Countries
United States
Customers / Operators:
Union Pacific Railroad
NOTE: Includes both past and present