USRA Heavy Pacific

USRA Heavy Pacific
Type and origin
Power type Steam
Builder
Total produced
  • Originals: 20
  • Copies: 17
Specifications
Configuration:
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 • Whyte 4-6-2
 • UIC 2′C1′ h2
Gauge 4 ft 8 1⁄2 in (1,435 mm)
Driver dia. 79 in (2,007 mm)
Wheelbase
  • Coupled: 14 ft 0 in (4.27 m)
  • Locomotive: 36 ft 2 in (11.02 m)
  • Loco & tender: 70 ft 8 1⁄2 in (21.55 m)
Axle load 60,000 lb (27,000 kg)
Adhesive weight 180,000 lb (82,000 kg)
Loco weight 300,000 lb (140,000 kg)
Tender weight 144,000 lb (65,000 kg)
Total weight 444,000 lb (201,000 kg)
Fuel capacity Coal
Water cap 8,000 US gal (30,000 l; 6,700 imp gal)
Tender cap. 32,000 lb (15,000 kg)
Firebox:
 • Firegrate area		 70.8 sq ft (6.58 m2)
Boiler pressure 200 lbf/in2 (1.38 MPa)
Heating surface 3,808 sq ft (353.8 m2)
 • Tubes 2,407 sq ft (223.6 m2)
 • Flues 1,090 sq ft (101 m2)
 • Firebox 284 sq ft (26.4 m2)
Superheater:
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 • Heating area 882 sq ft (81.9 m2)
Cylinders Two, outside
Cylinder size 27 in × 28 in (686 mm × 711 mm)
Valve gear Baker
Valve type 14-inch (356 mm) piston valves
Performance figures
Tractive effort 43,800 lbf (194.83 kN)
Factor of adh. 4.1

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. 1 copy survives it's AW&P 290 built by Lima in 1926 and ran excursions from 1989 to 1992 and is now under cosmetic restoration at the southeastern railroad museum in Duluth Georgia

References

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