USRA Heavy Mountain

USRA Heavy Mountain
Type and origin
Power type Steam
Builder
Total produced 15 (plus 37 copies)
Specifications
Configuration 4-8-2
UIC class 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)
Loco & tender 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 Notes
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 Notes
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. "Locomotives of the Grand Trunk Railway". Railroad History (Boston, MA: The Railway and Locomotive Historical Society, Inc.) (147). ISSN 0090-7847. 


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