| Pennsylvania Railroad CC1s | |
| Powertype: | Steam |
| Builder: | Baldwin Locomotive Works (1) |
| Builddate: | 1912 |
| Buildmodel: | Baldwin 16-44/72 EE |
| Whytetype: | (Mallet) |
| Totalproduction: | 1 |
| Driverdiameter: | 56inches |
| Weightondrivers: | 370000-2NaN-2 |
| Fueltype: | Coal |
| Boilerpressure: | 205psi |
| Firearea: | 781NaN1 |
| Superheaterarea: | 9881NaN1 |
| Totalsurface: | 49531NaN1 |
| Cylindercount: | Four: Mallet compound |
| Hpcylindersize: | 25x |
| Lpcylindersize: | 39x |
| Operator: | Pennsylvania Railroad |
| Fleetnumbers: | 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.