The reference for locomotives and railcars


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US Railroad Administration 0-6-0
United States | 1918 | 255 produced
No. 221 of the Chicago Junction, part of New York Central
No. 221 of the Chicago Junction, part of New York Central

The lightest of the USRA standard locomotives was a light switcher by US standards with three coupled axles and no carrying axles. With an axle load of 55.000 pounds, it still reached a weight that was to be found at the same time on ten-coupled freight locomotives in Central Europe. Like all USRA types, it was operated with superheated steam and, thanks to a driving wheel diameter of 51 inches and correspondingly large cylinders, achieved a starting tractive effort of almost 40,000 pounds or 175 kN.

A total of 255 examples of the actual USRA design were manufactured by ALCO in 1918 and 1919. Most customers procured between five and ten engines. The three largest operators were the Baltimore & Ohio with 40 Class D-30s, the Chicago & North Western with 35 Class M-3s and the Pennsylvania Railroad with 30 Class B28s. Later, some railroads made more pieces of the original USRA design. The Wheeling & Lake Erie only procured vehicles, of which two still exist today. While number 3984 is already being restored, number 3960 is still awaiting the start of its restoration.

Axle config0-6-0 (Six-coupled) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length62 ft 10 in
Wheelbase11 ft
Fixed wheelbase11 ft
Total wheelbase48 ft 10 1/2 in
Service weight165,000 lbs
Adhesive weight165,000 lbs
Total weight309,000 lbs
Axle load55,000 lbs
Water capacity8,000 us gal
Fuel capacity32,000 lbs (coal)
Power sourcesteam
Estimated power1,000 hp (746 kW)
Optimal speed16 mph
Starting effort39,102 lbf
Power Plant
Driver diameter51 in
Boiler pressure190 psi
Expansion typesimple
Cylinderstwo, 21 x 28 in
Grate area33 sq ft
Firebox area138 sq ft
Tube heating area1,233 sq ft
Evaporative heating area1,371 sq ft
Superheater area515 sq ft
Total heating area1,886 sq ft
Calculated Values
steam locomotive
last changed: 05/2022

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