USRA Heavy Mikado
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| Power type | Steam |
|---|---|
| Builder | ALCO, Baldwin, Lima |
| Build date | 1918–? |
| Configuration | 2-8-2 |
| UIC classification | 1'D1' |
| Driver size | 63 in |
The USRA Heavy Mikado was a USRA standard class of steam locomotive designed under the control of the United States Railroad Administration, the nationalized railroad system in the United States during World War I. These locomotives were of 2-8-2 wheel arrangement in the Whyte notation, or "1'D1'" in UIC classification.
They used the same running gear as the USRA Light Mikado but were built to a higher axle load with a much larger boiler for more power and steam-generating ability. Many aspects of the PRR L1s class were carried over to the Heavy Mikado, although not that locomotive's distinctive Belpaire firebox.
