Pennsylvania Railroad CC1s
Type and origin Power type Steam Builder Baldwin Locomotive Works (1) Model Baldwin 16-44/72 EE Build date 1912 Total produced 1
Specifications Configuration: ​  • Whyte 0-8-8-0 (Mallet) Gauge 4 ft 8+1⁄2 in (1,435 mm) Driver dia. 56 in (1,400 mm) Adhesive weight 370,000 lb (167,800 kg) Fuel type Coal Firebox: ​  • Grate area 78 sq ft (7.2 m2) Boiler pressure 205 psi (1.41 MPa) Heating surface 4,953 sq ft (460.1 m2) Superheater: ​  • Heating area 988 sq ft (91.8 m2) Cylinders Four: Mallet compound High-pressure cylinder 25 in × 30 in (635 mm × 762 mm) Low-pressure cylinder 39 in × 30 in (991 mm × 762 mm)
Career Operators Pennsylvania Railroad Numbers 3397 Disposition Scrapped in 1932

The Pennsylvania Railroad (PRR) class CC1s consisted of a single experimental 0-8-8-0 steam locomotive built by Baldwin Locomotive Works in 1912. It was assigned road number #3397 and placed in service at the PRR Pitcairn yard in Pitcairn, Pennsylvania, near Pittsburgh. A subsequent class, the CC2s, was constructed after the tests conducted with this locomotive. Finding little advantage to articulated steam locomotives, the PRR scrapped it in 1932.