The reference for locomotives and railcars


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Pennsylvania class C1
United States | 1925 | 90 produced
No. 6583 in July 1940 in Cleveland, Ohio
No. 6583 in July 1940 in Cleveland, Ohio

The Pennsylvania Railroad's Class C1 was the heaviest 0-8-0 locomotive ever built. It had a service mass of 278,000 pounds and a maximum axle load of 74,000 pounds on the first axle. Due to its long wheelbase of 15 ft 9 in, however, the tracks were damaged and there were also frequent derailments. As far as possible, only switching locomotives with a 0-6-0 wheel arrangement were used. Nevertheless, the C1 was able to demonstrate its high tractive power on humps. The 90 locomotives were retired between 1948 and 1953.

Built1925, 1927
ManufacturerALCO, Baldwin, N&W Roanoke Shops
Axle config0-8-0 (Eight-coupled) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Wheelbase15 ft 9 in
Fixed wheelbase15 ft 9 in
Service weight278,000 lbs
Adhesive weight278,000 lbs
Axle load74,000 lbs
Fuel capacitycoal
Power sourcesteam
Estimated power2,500 hp (1,864 kW)
Optimal speed19 mph
Starting effort82,989 lbf
Power Plant
Driver diameter56 in
Boiler pressure250 psi
Expansion typesimple
Cylinderstwo, 27 x 30 in
Grate area61.7 sq ft
Evaporative heating area3,921 sq ft
Superheater area1,194 sq ft
Total heating area5,115 sq ft
Calculated Values
steam locomotive
last changed: 08/2023

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