Pennsylvania Railroad class A3

The Pennsylvania Railroad (PRR) A3 was an 0-4-0 class steam locomotive that were built at Altoona Works between 1895 until 1905. A3s were used to shunt and sort out railroad cars at various PRR yards. Later, some A3s were converted to A3a, which had saddle tanks. The A3s were retired by 1920s, when the railroad introduced the much stronger A5s. All locomotives of the A3 class were scrapped.

Pennsylvania Railroad A3
Type and origin
BuilderAltoona Works
Total produced81
Specifications
Configuration:
​
 • Whyte0-4-0
 • UICB
Gauge4 ft 8+1⁄2 in (1,435 mm) standard gauge
Driver dia.4 ft 2 in (1.270 m)
Boiler pressure140 psi (0.97 MPa) (production series)
Cylinders2, outside
Cylinder size17 in × 24 in (432 mm × 610 mm)
Career
OperatorsPennsylvania Railroad
DispositionAll Scrapped


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