Pennsylvania Railroad class C1

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)
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

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. The C1s were retired between 1948 and 1953.

None survive today.

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