Baltimore and Ohio class N-1

Specifications
Specifications
Configuration:;
• Whyte	4-4-4-4
• UIC	2′BB2′
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Leading dia.	36 in (914 mm)
Driver dia.	76 in (1,930 mm)
Trailing dia.	42 in (1,067 mm)
Minimum curve	13° or 441.68 ft (134.62 m) normal,; 18° or 319.62 ft (97.42 m) slow
Length	117 ft 0+1⁄4 in (35.67 m)
Adhesive weight	238,000 lb (108,000 kilograms; 108 metric tons)
Loco weight	386,500 lb (175,300 kilograms; 175.3 metric tons)
Tender weight	350,000 lb (160,000 kilograms; 160 metric tons)
Total weight	736,500 lb (334,100 kilograms; 334.1 metric tons)
Tender type	Vanderbilt with two 3-axle trucks
Fuel type	Coal
Fuel capacity	46,000 lb (21,000 kilograms; 21 metric tons)
Water cap.	22,000 US gal (83,000 L; 18,000 imp gal)
Firebox:
• Grate area	80.5 sq ft (7.48 m2)
Boiler pressure	350 lbf/in2 (2.41 MPa)
Heating surface:
• Firebox	677 sq ft (62.9 m2)
• Tubes and flues	4,220 sq ft (392 m2)
• Total surface	4,897 sq ft (454.9 m2)
Superheater:;
• Type	B&O
• Heating area	1,312 sq ft (121.9 m2)
Cylinders	Four, duplex
Cylinder size	18 in × 26.5 in (457 mm × 673 mm)
Valve gear	Walschaerts

Type and origin
Type and origin
Power type	Steam
Builder	B&O Mount Clare Shops
Build date	May 1937
Total produced	1

B&O #5600 *George H. Emerson*
B&O #5600 George H. Emerson
	Baltimore and Ohio Railroad #5600 George H. Emerson
Power type
Type and origin
Power type	Steam
Builder	B&O Mount Clare Shops
Build date	May 1937
Total produced	1
Configuration:;
Specifications
Configuration:;
• Whyte	4-4-4-4
• UIC	2′BB2′
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Leading dia.	36 in (914 mm)
Driver dia.	76 in (1,930 mm)
Trailing dia.	42 in (1,067 mm)
Minimum curve	13° or 441.68 ft (134.62 m) normal,; 18° or 319.62 ft (97.42 m) slow
Length	117 ft 0+1⁄4 in (35.67 m)
Adhesive weight	238,000 lb (108,000 kilograms; 108 metric tons)
Loco weight	386,500 lb (175,300 kilograms; 175.3 metric tons)
Tender weight	350,000 lb (160,000 kilograms; 160 metric tons)
Total weight	736,500 lb (334,100 kilograms; 334.1 metric tons)
Tender type	Vanderbilt with two 3-axle trucks
Fuel type	Coal
Fuel capacity	46,000 lb (21,000 kilograms; 21 metric tons)
Water cap.	22,000 US gal (83,000 L; 18,000 imp gal)
Firebox:
• Grate area	80.5 sq ft (7.48 m2)
Boiler pressure	350 lbf/in2 (2.41 MPa)
Heating surface:
• Firebox	677 sq ft (62.9 m2)
• Tubes and flues	4,220 sq ft (392 m2)
• Total surface	4,897 sq ft (454.9 m2)
Superheater:;
• Type	B&O
• Heating area	1,312 sq ft (121.9 m2)
Cylinders	Four, duplex
Cylinder size	18 in × 26.5 in (457 mm × 673 mm)
Valve gear	Walschaerts
Power output
Performance figures
Power output	3,936 hp (2,935 kW) at cylinders
Tractive effort	65,000 lbf (289.1 kN)
Factor of adh.	3.66
Operators
Career
Operators	Baltimore and Ohio Railroad
Class	N-1
Numbers	5600
Official name	George H. Emerson
Retired	1943
Scrapped	October 1950

The Baltimore and Ohio Railroad's sole Class N-1 steam locomotive, #5600 (named "George H. Emerson"), was the first duplex locomotive and the first 4-4-4-4 locomotive ever built. It was Unique in the fact that it had a water tube firebox, which was much larger then a normal firebox. It was designed and built by the railroad's own shops in 1937.

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