USRA Light Pacific
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| Type and origin | |
|---|---|
| Power type | Steam |
| Builder | |
| Build date | 1919–1920 |
| Total produced | 81, plus copies |
| Specifications | |
|---|---|
| Configuration: |
|
| • Whyte | 4-6-2 |
| • UIC | 2′C1′ h2 |
| Gauge | 4 ft 8 1⁄2 in (1,435 mm) |
| Driver dia. | 73 in (1,854 mm) |
| Wheelbase |
|
| Axle load | 55,000 lb (25,000 kilograms) |
| Adhesive weight | 165,000 lb (75,000 kilograms) |
| Loco weight | 270,000 lb (120,000 kilograms) |
| Tender weight | 144,000 lb (65,000 kilograms) |
| Total weight | 414,000 lb (188,000 kilograms) |
| Firebox: • Firegrate area |
66.7 sq ft (6.20 m2) |
| Boiler pressure | 200 lbf/in2 (1.38 MPa) |
| Heating surface | 3,333 sq ft (309.6 m2) |
| • Tubes | 2,091 sq ft (194.3 m2) |
| • Flues | 981 sq ft (91.1 m2) |
| • Firebox | 234 sq ft (21.7 m2) |
| Superheater: |
|
| • Heating area | 794 sq ft (73.8 m2) |
| Cylinders | Two |
| Cylinder size | 25 in × 28 in (635 mm × 711 mm) |
| Valve type | 14-inch (356 mm) piston valves |
| Performance figures | |
|---|---|
| Tractive effort | 40,700 lbf (181.0 kN) |
| Factor of adh. | 4.1 |
The USRA Light Pacific 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. This was the standard light passenger locomotive of the USRA types, and was 4-6-2 wheel arrangement in the Whyte notation, or 2′C1′ in UIC classification.
A total of 81 locomotives were built under USRA control; these were sent to the following railroads:
After the dissolution of the USRA, all three railroads ordered additional copies of the USRA Light Pacific design, while the Grand Trunk Western Railroad and the Mobile and Ohio Railroad ordered only copies.
Atlantic Coast Line Railroad number 1504 is the only surviving USRA standard light pacific, it is currently under restoration in Jacksonville Florida.
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Wikipedia