USRA Heavy Mountain

Specifications
Configuration:;
• Whyte	4-8-2
• UIC	2′D1′ h2
Gauge	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);
Axle load	60,000 lb (27,000 kg)
Adhesive weight	240,000 lb (110,000 kg)
Loco weight	350,000 lb (160,000 kg)
Tender weight	172,000 lb (78,000 kg)
Total weight	522,000 lb (237,000 kg)
Fuel type	Coal
Fuel capacity	32,000 lb (15,000 kg)
Water cap	10,000 US gal (38,000 l; 8,300 imp gal)
Firebox:; • Firegrate area	76.3 sq ft (7.09 m2)
Boiler pressure	200 pounds-force per square inch (1,380 kPa; 14.1 kgf/cm2)
Heating surface	4,666 sq ft (433.5 m2)
• Tubes	2,790 sq ft (259 m2)
• Flues	1,323 sq ft (122.9 m2)
• Firebox	346 sq ft (32.1 m2)
Superheater:;
• Heating area	10,780 sq ft (1,001 m2)
Cylinders	Two
Cylinder size	28 in × 30 in (711 mm × 762 mm)
Valve gear	Walschaerts
Valve type	14-inch (360 mm) piston valves

Type and origin
Power type	Steam
Builder	American Locomotive Company (13+25); Baldwin Locomotive Works (2+12);
Total produced	15 (plus 37 copies)

USRA Heavy Mountain
Type and origin
Power type	Steam
Builder	American Locomotive Company (13+25); Baldwin Locomotive Works (2+12);
Total produced	15 (plus 37 copies)
Specifications
Configuration:;
• Whyte	4-8-2
• UIC	2′D1′ h2
Gauge	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);
Axle load	60,000 lb (27,000 kg)
Adhesive weight	240,000 lb (110,000 kg)
Loco weight	350,000 lb (160,000 kg)
Tender weight	172,000 lb (78,000 kg)
Total weight	522,000 lb (237,000 kg)
Fuel type	Coal
Fuel capacity	32,000 lb (15,000 kg)
Water cap	10,000 US gal (38,000 l; 8,300 imp gal)
Firebox:; • Firegrate area	76.3 sq ft (7.09 m2)
Boiler pressure	200 pounds-force per square inch (1,380 kPa; 14.1 kgf/cm2)
Heating surface	4,666 sq ft (433.5 m2)
• Tubes	2,790 sq ft (259 m2)
• Flues	1,323 sq ft (122.9 m2)
• Firebox	346 sq ft (32.1 m2)
Superheater:;
• Heating area	10,780 sq ft (1,001 m2)
Cylinders	Two
Cylinder size	28 in × 30 in (711 mm × 762 mm)
Valve gear	Walschaerts
Valve type	14-inch (360 mm) piston valves
Performance figures
Tractive effort	58,200 lbf (258.89 kN)
Factor of adh.	4.1

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.

Table of original USRA allocation
Railroad	Quantity	Class	Road numbers
Chesapeake and Ohio Railway	5	J-1	539–549
Norfolk and Western Railway	10	K2	116–125
Total	15

Table of copies acquired
Railroad	Quantity	Class	Road numbers
Chesapeake and Ohio Railway	2	J-1	539–549
Florida East Coast Railway	23	801	801–823
Norfolk and Western Railway	12	K2a	126–137
Total	37

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
Edson, William D.; Corley, Raymond F. (Autumn 1982). "Locomotives of the Grand Trunk Railway". Railroad History. Boston, Mass.: Railway and Locomotive Historical Society. 147. 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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