Great Northern P-1

The Great Northern P-1 was a class of 15 4-8-2 "Mountain" type steam locomotives built by the Lima Locomotive Works in 1914 and operated by the Great Northern Railway.

Great Northern P-1 class
Chart from Railway Age Gazette Volume 57 (23) pp 1047-1050 showing Mountain type locomotive 1755
Type and origin
Power typeSteam
BuilderLima Locomotive Works
Serial number1364-1378
Build dateMay-June 1914
Total produced15
Rebuild dateJune-November 1928
Number rebuilt15
Specifications
Configuration:
​
 • Whyte4-8-2
 • UIC2′D2′ h1
Gauge4 ft 8 1⁄2 in (1,435 mm) standard gauge
Leading dia.36.5 in (927 mm)
Driver dia.63 in (1,600 mm)
Trailing dia.42.5 in (1,080 mm)
Wheelbase71.33 ft (21,741 mm)
Axle load55,000 lb (25,000 kilograms; 25 metric tons)
Adhesive weight218,000 lb (99,000 kilograms; 99 metric tons)
Loco weight236,000 lb (107,000 kilograms; 107 metric tons)
Tender weight161,000 lb (73,000 kilograms; 73 metric tons)
Total weight487,000 lb (221,000 kilograms; 221 metric tons)
Fuel typeNos. 1750-1759: Coal
Nos. 1760-1764: Fuel oil
Fuel capacity15 short tons (13.6 t; 13.4 long tons)
Water cap8,000 US gal (30,000 l; 6,700 imp gal)
Firebox:
 • Firegrate area		78 sq ft (7.2 m2)
Boiler pressure180 lbf/in2 (1.24 MPa)
Heating surface:
 • Firebox		340 sq ft (32 m2)
CylindersTwo
Cylinder size28 in × 32 in (711 mm × 813 mm)
Valve gearWalschaert
Performance figures
Tractive effort60,928 lbf (271.02 kN)
Factor of adh.3.58
Career
OperatorsGreat Northern
ClassP-1
Numbers1750–1764 (P-1) 2175-2189 (Q-2)
Retired1928 (1953-1958 as Q-2s)
Preserved0
DispositionAll rebuilt to Q-2 Class 2-10-2s in 1928 and scrapped by last retirement

History

The P-1s were at first assigned to pull passenger trains, but were proven to be too slow and were reassigned to freight service. Between June and November 1928, they were all rebuilt by the GN's Superior, Great Falls, and Hillyard Shops to Q-2 class 2-10-2s.[1]

Disposition

Neither the P-1s nor the Q-2s have survived into preservation today. Retirement started on July 16, 1953 and were all retired by April 1958.

References
  1. "Great Northern 4-8-2 "Mountain" Locomotives in the USA". steamlocomotive.com.
  • Keyes, Norman C., Jr.; Middleton, Kenneth R. (Autumn 1980). "The Great Northern Railway Company: All-Time Locomotive Roster, 1861–1970". Railroad History. Boston, Mass.: Railway and Locomotive Historical Society. 143: 108, 110. ISSN 0090-7847. JSTOR 43523930.
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