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Reading Company C1a Class Steam Locomotive
The C1a Class were a type of 4-4-4 steam locomotive built for the Philadelphia and Reading Railway in 1915. Four locomotives were built, road numbers 110-113. They used front and rear trucks that were effectively identical. During a year of operation, they proved to be quite unstable; after that year, they were rebuilt to 4-4-2 "Atlantic" locomotives, reclassified as P7sa, and renumbered to 350-353.

P&RR C1a Class Overview
Type and origin
Power type: Steam
Builder: Reading Company
Build date: 1915
Total produced: 4
​ • Whyte: 4-4-4
Gauge: 4 ft 8 1⁄2 in (1,435 mm)
Driver diameter: 6 ft 8 in (2.032 m)
Locomotive weight: 230,800 lb (104,700 kg)
Fuel type: Coal
Boiler pressure: 240 psi (1.65 MPa)
Cylinders: Two, outside
Cylinder size: 23.5 in × 26 in (597 mm × 660 mm)
Performance figures
Tractive effort: 36,604 lbf (162.82 kN)
Withdrawn: 1916

See also:

Reading Railroad

4-4-4 Locomotives

Steam Locomotives


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Reading 4-4-4 Locomotive No. 110.

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Reading 4-4-4 Locomotive No. 110.
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