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 type Steam Builder Lima Locomotive Works Serial number 1364-1378 Build date May-June 1914 Total produced 15 Rebuild date June-November 1928 Number rebuilt 15
Specifications Configuration: ​  • Whyte 4-8-2  • UIC 2′D2′ h1 Gauge 4 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) Wheelbase 71.33 ft (21,741 mm) Axle load 55,000 lb (25,000 kilograms; 25 metric tons) Adhesive weight 218,000 lb (99,000 kilograms; 99 metric tons) Loco weight 236,000 lb (107,000 kilograms; 107 metric tons) Tender weight 161,000 lb (73,000 kilograms; 73 metric tons) Total weight 487,000 lb (221,000 kilograms; 221 metric tons) Fuel type Nos. 1750-1759: Coal Nos. 1760-1764: Fuel oil Fuel capacity 15 short tons (13.6 t; 13.4 long tons) Water cap. 8,000 US gal (30,000 l; 6,700 imp gal) Firebox:  • Firegrate area 78 sq ft (7.2 m2) Boiler 95 in (2,413 mm) Boiler pressure 180 lbf/in2 (1.24 MPa) Heating surface:  • Firebox 340 sq ft (32 m2) Cylinders Two Cylinder size 28 in × 32 in (711 mm × 813 mm) Valve gear Walschaert
Performance figures Tractive effort 60,928 lbf (271.02 kN) Factor of adh. 3.58
Career Operators Great Northern Class P-1 Numbers 1750–1764 (P-1) 2175-2189 (Q-2) Retired 1928 (1953-1958 as Q-2s) Preserved 0 Disposition All 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

• 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.