| HH1s class |
|---|
 Postcard depiction of Pennsylvania Railroad #3396. |
| Type and origin |
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| Power type |
Steam |
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| Builder |
ALCO |
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| Build date |
1911 |
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|
| Specifications |
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Configuration:
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|
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| • Whyte |
2-8-8-2 |
|---|
| Gauge |
4 ft 8 1⁄2 in (1,435 mm) |
|---|
| Firebox type |
wagon-top |
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|
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|
The Pennsylvania Railroad's class HH1s comprised a single 2-8-8-2 type steam locomotive. Unlike most Pennsylvania Railroad steam locomotives, it had a wagon-top boiler. It was built by the American Locomotive Company (ALCO) in 1911. For 17 years, the single HH1s served as a helper until 1928. It had the road number 3396 and was subsequently scrapped after it was taken out of service in 1928.