USRA Heavy Pacific
USRA Heavy Pacific
| Type and origin |
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| Power type |
Steam |
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| Builder |
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| Total produced |
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| Specifications |
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| Configuration |
4-6-2 |
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| UIC class |
2′C1′ h2 |
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| Gauge |
4 ft 8 1⁄2 in (1,435 mm) |
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| Driver diameter |
79 in (2,007 mm) |
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| Wheelbase |
- Coupled: 14 feet 0 inches (4.27 m)
- Locomotive: 36 feet 2 inches (11.02 m)
- Loco & tender: 70 feet 8 1⁄2 inches (21.55 m)
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| Axle load |
60,000 lb (27,000 kg) |
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| Adhesive weight |
180,000 lb (82,000 kg) |
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| Loco weight |
300,000 lb (140,000 kg) |
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| Tender weight |
144,000 lb (65,000 kg) |
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| Loco & tender weight |
444,000 lb (201,000 kg) |
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| Fuel capacity |
Coal |
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| Water cap |
8,000 US gal (30,000 l; 6,700 imp gal) |
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| Tender cap |
32,000 lb (15,000 kg) |
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Firebox:
• Firegrate area |
70.8 sq ft (6.58 m2) |
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| Boiler pressure |
200 lbf/in2 (1.38 MPa) |
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| Heating surface |
3,808 sq ft (353.8 m2) |
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| • Tubes |
2,407 sq ft (223.6 m2) |
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| • Flues |
1,090 sq ft (101 m2) |
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| • Firebox |
284 sq ft (26.4 m2) |
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Superheater:
• Heating area |
882 sq ft (81.9 m2) |
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| Cylinders |
Two, outside |
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| Cylinder size |
27 in × 28 in (686 mm × 711 mm) |
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| Valve gear |
Baker |
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| Valve type |
14-inch (356 mm) piston valves |
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The USRA Heavy 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 heavy 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 20 locomotives were built under USRA control, with the production split between the Baldwin Locomotive Works and the American Locomotive Company's Richmond plant. All 20 went to the Erie Railroad, who also ordered 11 copies from Baldwin, which were delivered between 1923 and 1926. Lima Locomotive Works also built six locomotives based on the USRA heavy 4-6-2 for the Chicago and Eastern Illinois Railroad, who classified then as their K3 class. None of the originals built under USRA auspices or any of the subsequent copies were preserved.
References
- Drury, George H. (1983), Guide to North American Steam Locomotives, Waukesha, Wisconsin: Kalmbach Publishing Company, ISBN 0-89024-206-2, LCCN 93041472
- Huddleston, Eugene L. (2002). Uncle Sam's Locomotives: The USRA and the Nation's Railroads. Bloomington, Indiana: Indiana University Press. ISBN 0-253-34086-1.
- Westcott, Linn H. (1960). Model Railroader Cyclopedia, Volume 1: Steam Locomotives. Milwaukee, Wisconsin: Kalmbach Publishing Co. ISBN 0-89024-001-9.
- "United States Railroad Administration 4-6-2 "Pacific" Locomotives". steamlocomotive.com. Retrieved 5 August 2015.
- "Chicago & Eastern Illinois 4-6-2 "Pacific" Locomotives". steamlocomotive.com. Retrieved 5 August 2015.
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| | Switchers | |
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| | Light | |
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| | Heavy | |
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| | Articulated | |
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