The reference for locomotives and railcars


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General Electric U50 and U50C
United States | 1963 | 66 produced
Union Pacific No. 44 in October 1966 at Denver, Colorado
Union Pacific No. 44 in October 1966 at Denver, Colorado
Bill Marvel
ManufacturerGeneral Electric
Axle configB+B-B+B C-C 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length83 ft 8 11/16 in83 ft 5 1/2 in
Wheelbase60 ft 2 in
Fixed wheelbase9 ft 4 in
Service weight575,500 lbs442,660 lbs
Adhesive weight575,500 lbs442,660 lbs
Axle load71,938 lbs73,777 lbs
Power sourcediesel-electric
Top speed70 mph
Starting effort160,000 lbf109,000 lbf
EngineGE 7FDL-16GE 7FDL-12
Engine type2x V16 diesel2x V12 diesel
Fuel5,800 us gal (diesel)6,000 us gal (diesel)
Engine output5,000 hp (3,729 kW)
Power Plant
Calculated Values
diesel locomotive
GE Universal
last changed: 09 2023

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