4 ft 8+1⁄2 in (
1,435 mm)
Wheelbase | - Coupled: 18 ft 3 in (5.56 m)
- Locomotive: 40 ft 0 in (12.19 m)
- Loco & tender: 75 ft 8+1⁄2 in (23.08 m)
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Axle load | 60,000 lb (27,000 kg) |
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Adhesive weight | 240,000 lb (110,000 kg) |
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Loco weight | 350,000 lb (160,000 kg) |
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Tender weight | 172,000 lb (78,000 kg) |
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Total weight | 522,000 lb (237,000 kg) |
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Fuel type | Coal |
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Fuel capacity | 32,000 lb (15,000 kg) |
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Water cap. | 10,000 US gal (38,000 L; 8,300 imp gal) |
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Firebox: | |
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• Grate area | 76.3 sq ft (7.09 m2) |
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Boiler pressure | 200 psi (1.38 MPa) |
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Heating surface: | |
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• Firebox | 346 sq ft (32.1 m2) |
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• Tubes | 2,790 sq ft (259 m2) |
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• Flues | 1,323 sq ft (122.9 m2) |
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• Total surface | 4,666 sq ft (433.5 m2) |
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Superheater:
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• Heating area | 10,780 sq ft (1,001 m2) |
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Cylinders | Two |
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Cylinder size | 28 in × 30 in (711 mm × 762 mm) |
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Valve gear | Walschaerts |
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Valve type | 14-inch (360 mm) piston valves |
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Performance figures |
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Tractive effort | 58,200 lbf (258.89 kN) |
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Factor of adh. | 4.1 |
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Career |
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Preserved | 0 |
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Scrapped | 1940-1959 |
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Disposition | All scrapped |
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The USRA Heavy Mountain 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 freight locomotive of the USRA types, and was of 4-8-2 wheel arrangement in the Whyte notation, or 2′D1′ in UIC classification.
A total of 15 locomotives were built under the auspices of the USRA.
Neither the originals built by the USRA or any of the subsequent copies were preserved, being scrapped between 1940 and 1959.
References
- Drury, George H. (1993), Guide to North American Steam Locomotives, Waukesha, Wisconsin: Kalmbach Publishing Company, ISBN 0-89024-206-2, LCCN 93041472
- Edson, William D.; Corley, Raymond F. (Autumn 1982). "Locomotives of the Grand Trunk Railway". Railroad History. 147 (147). Boston, Mass.: Railway and Locomotive Historical Society: 42–183. JSTOR 43520915.
- Huddleston, Eugene L. (2002). Uncle Sam's Locomotives: The USRA and the Nation's Railroads. Bloomington, Ind.: Indiana University Press. ISBN 0-253-34086-1.
- Westcott, Linn H. (1960). Model Railroader Cyclopedia, Volume 1: Steam Locomotives. Milwaukee, Wis.: Kalmbach Publishing Co. ISBN 0-89024-001-9.
- "Standard Heavy 4-8-2 and Light 2-10-2 Locomotives". Railway Age. 65 (24): 1067–1073. December 13, 1918 – via Archive.org.
- "Tentative Specifications for Standard Locomotives". Railway Age. 64 (16): 1039–1041. April 19, 1918 – via Archive.org.
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