Pennsylvania Railroad class C1

The PRR C1 was the Pennsylvania Railroad's class of 0-8-0 steam locomotive, used in switching service. The 0-8-0 was common on most railroads, but not on PRR; when the railroad needed bigger motive power, they used the 2-8-0 "Consolidation". PRR wanted the best motive power to handle the switching chores at yards and interchanges and the C1 class was the heaviest two-cylinder 0-8-0 switcher ever produced. Calculated tractive effort was 76154 lb, based on 78% MEP with 60% maximum cutoff. All C1s were retired between 1948 and 1953, none being preserved.

Pennsylvania Railroad C1
PRR C1 locomotive #6560. Photographed at Louisville, KY, 28 June 1950 by Otto Perry
Type and origin Power type Steam Builder Pennsylvania Railroad Build date 1925, 1927 Total produced 90
Specifications Configuration: ​  • Whyte 0-8-0  • UIC Dh Gauge 4 ft 8 ^1⁄2 in (1,435 mm) Driver dia. 56 in (1.422 m) Length 4 ft Axle load 74,000 lb (33.6 t) Loco weight 278,000 lb (126.1 t) Boiler pressure 250 psi (1.72 MPa) Cylinders Two Cylinder size 27 in × 30 in (686 mm × 762 mm)
Performance figures Tractive effort 76,154 lbf (338.7 kN)
Career Numbers 6550–6639 Retired 1948–1953 Disposition all scrapped