Great Northern S-2

Specifications
Specifications
Configuration:;
• Whyte	4-8-4
• UIC	2′D2′ h2
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Leading dia.	36 in (914 mm)
Driver dia.	80 in (2,032 mm)
Trailing dia.	46 in (1,168 mm)
Tender wheels	33 in (838 mm)
Wheelbase	Loco & tender: 91.17 ft (27.79 m)
Length	103 ft 3+1⁄8 in (31.47 m)
Width	11 ft 0+3⁄4 in (3.37 m)
Height	16 ft 0+7⁄8 in (4.90 m)
Axle load	64,250 lb (29,140 kilograms; 29.14 metric tons)
Adhesive weight	257,000 lb (117,000 kilograms; 117 metric tons)
Loco weight	438,120 lb (198,730 kilograms; 198.73 metric tons)
Tender weight	Working: 326,560 lb (148,130 kilograms; 148.13 metric tons); Empty: 136,300 lb (61,800 kilograms; 61.8 metric tons)
Total weight	764,680 lb (346,850 kilograms; 346.85 metric tons)
Tender type	Vanderbilt, Water-bottom
Fuel type	Fuel oil
Fuel capacity	5,800 US gal (22,000 L; 4,800 imp gal)
Water cap.	17,250 US gal (65,300 L; 14,360 imp gal)
Firebox:
• Grate area	97.75 sq ft (9.081 m2)
Boiler	94 in (2,400 mm)
Boiler pressure	225 lbf/in2 (1.55 MPa)
Heating surface:
• Firebox	401 sq ft (37.3 m2)
• Tubes	2.25 in (57 mm)
• Flues	3.5 in (89 mm)
• Total surface	4,781 sq ft (444.2 m2)
Superheater:;
• Type	Type E
• Heating area	2,265 sq ft (210.4 m2)
Cylinders	Two
Cylinder size	29 in × 29 in (737 mm × 737 mm)
Valve gear	Walschaert
Valve type	Piston valves

Type and origin
Type and origin
Power type	Steam
Designer	William Kelly
Builder	Baldwin Locomotive Works
Serial number	61211–61216, 61224, 61225, 61237–61242
Model	Baldwin 16-52-2⁄4-E, (#1 to #14)
Build date	February–March 1930
Total produced	14

Great Northern S-2 class
Great Northern S-2 class
	GN 2578 with a train at Fargo, North Dakota in the summer of 1939.
Power type
Type and origin
Power type	Steam
Designer	William Kelly
Builder	Baldwin Locomotive Works
Serial number	61211–61216, 61224, 61225, 61237–61242
Model	Baldwin 16-52-2⁄4-E, (#1 to #14)
Build date	February–March 1930
Total produced	14
Configuration:;
Specifications
Configuration:;
• Whyte	4-8-4
• UIC	2′D2′ h2
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Leading dia.	36 in (914 mm)
Driver dia.	80 in (2,032 mm)
Trailing dia.	46 in (1,168 mm)
Tender wheels	33 in (838 mm)
Wheelbase	Loco & tender: 91.17 ft (27.79 m)
Length	103 ft 3+1⁄8 in (31.47 m)
Width	11 ft 0+3⁄4 in (3.37 m)
Height	16 ft 0+7⁄8 in (4.90 m)
Axle load	64,250 lb (29,140 kilograms; 29.14 metric tons)
Adhesive weight	257,000 lb (117,000 kilograms; 117 metric tons)
Loco weight	438,120 lb (198,730 kilograms; 198.73 metric tons)
Tender weight	Working: 326,560 lb (148,130 kilograms; 148.13 metric tons); Empty: 136,300 lb (61,800 kilograms; 61.8 metric tons)
Total weight	764,680 lb (346,850 kilograms; 346.85 metric tons)
Tender type	Vanderbilt, Water-bottom
Fuel type	Fuel oil
Fuel capacity	5,800 US gal (22,000 L; 4,800 imp gal)
Water cap.	17,250 US gal (65,300 L; 14,360 imp gal)
Firebox:
• Grate area	97.75 sq ft (9.081 m2)
Boiler	94 in (2,400 mm)
Boiler pressure	225 lbf/in2 (1.55 MPa)
Heating surface:
• Firebox	401 sq ft (37.3 m2)
• Tubes	2.25 in (57 mm)
• Flues	3.5 in (89 mm)
• Total surface	4,781 sq ft (444.2 m2)
Superheater:;
• Type	Type E
• Heating area	2,265 sq ft (210.4 m2)
Cylinders	Two
Cylinder size	29 in × 29 in (737 mm × 737 mm)
Valve gear	Walschaert
Valve type	Piston valves
Maximum speed
Performance figures
Maximum speed	At least 100 mph (160 km/h)
Power output	3,300 hp (2,500 kW)
Tractive effort	58,305 lbf (259.35 kN)
Factor of adh.	4.40
Operators
Career
Operators	Great Northern
Class	S-2
Numbers	2575–2588
Delivered	March 11-April 10, 1930
Retired	1955-1958
Preserved	One preserved (No. 2584), plus tender from No. 2575 preserved
Disposition	Great Northern 2584 on display in Havre, Montana, tender from No. 2575 used as auxiliary tender for SP&S 700, remainder scrapped

The Great Northern S-2 was a class of 14 4-8-4 "Northern" type steam locomotives built by the Baldwin Locomotive Works in 1930 and operated by the Great Northern Railway until the late 1950s.

The locomotives were built to haul passengers on the GN mainline, pulling the Empire Builder and the Oriental Limited and were assigned to the Montana division for service between Williston, North Dakota and Havre, Montana and the Spokane division for service between Spokane, Washington and Wenatchee, Washington, then assigned to the Divide between Havre and Whitefish, Montana, of which mostly runs through the famed Marias Pass, though they were also used on GN tracks outside of their assigned areas.

Today, only one S-2 survives, No. 2584. It was retired in December 1957 and moved to the Havre depot in Havre, Montana in May 1964 where it still resides today.

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