Norfolk and Western A Class

Specifications
Specifications
Configuration:;
• Whyte	2-6-6-4
• UIC	(1′C)C2′ h4g
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Leading dia.	33 in (838 mm)
Driver dia.	70 in (1,778 mm)
Trailing dia.	42 in (1,067 mm)
Wheelbase	Loco & tender: 108.27 ft (33.00 m)
Length	121 ft 9+1⁄4 in (37.1 m) including tender
Width	11 ft (3.35 m)
Height	15 ft 10 in (4.83 m)
Axle load	72,000 lb (33,000 kilograms; 33 metric tons)
Adhesive weight	433,350 lb (196,560 kilograms; 196.56 metric tons)
Loco weight	573,000 lb (260,000 kilograms; 260 metric tons)
Tender weight	378,600 lb (171,700 kilograms; 171.7 metric tons)
Total weight	951,600 lb (431,600 kilograms; 431.6 metric tons)
Fuel type	Coal
Fuel capacity	30 short tons (27 t)
Water cap.	22,000 US gal (83,000 L; 18,000 imp gal)
Fuel consumption	7 short tons (6.4 t) of coal per hour; 13,906 US gal (52,640 L; 11,579 imp gal) of water per hour
Firebox:
• Grate area	122 sq ft (11.3 m2)
Boiler	106 in (2,692 mm)
Boiler pressure	300 lbf/in2 (2.07 MPa)
Heating surface:
• Firebox	587 sq ft (54.5 m2)
Superheater:;
• Type	Type E
• Heating area	2,703 sq ft (251.1 m2)
Cylinders	Four
Cylinder size	24 in × 30 in (610 mm × 762 mm)
Valve gear	Baker

Type and origin
Type and origin
Power type	Steam
Builder	N&W's Roanoke Shops
Serial number	266–267, 273–280, 332–346, 353–362, 380–387
Build date	1936–1950
Total produced	43

Norfolk and Western A class
Norfolk and Western A class
	Norfolk & Western No. 1206 at the New York World's Fair on June 17, 1939
Power type
Type and origin
Power type	Steam
Builder	N&W's Roanoke Shops
Serial number	266–267, 273–280, 332–346, 353–362, 380–387
Build date	1936–1950
Total produced	43
Configuration:;
Specifications
Configuration:;
• Whyte	2-6-6-4
• UIC	(1′C)C2′ h4g
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Leading dia.	33 in (838 mm)
Driver dia.	70 in (1,778 mm)
Trailing dia.	42 in (1,067 mm)
Wheelbase	Loco & tender: 108.27 ft (33.00 m)
Length	121 ft 9+1⁄4 in (37.1 m) including tender
Width	11 ft (3.35 m)
Height	15 ft 10 in (4.83 m)
Axle load	72,000 lb (33,000 kilograms; 33 metric tons)
Adhesive weight	433,350 lb (196,560 kilograms; 196.56 metric tons)
Loco weight	573,000 lb (260,000 kilograms; 260 metric tons)
Tender weight	378,600 lb (171,700 kilograms; 171.7 metric tons)
Total weight	951,600 lb (431,600 kilograms; 431.6 metric tons)
Fuel type	Coal
Fuel capacity	30 short tons (27 t)
Water cap.	22,000 US gal (83,000 L; 18,000 imp gal)
Fuel consumption	7 short tons (6.4 t) of coal per hour; 13,906 US gal (52,640 L; 11,579 imp gal) of water per hour
Firebox:
• Grate area	122 sq ft (11.3 m2)
Boiler	106 in (2,692 mm)
Boiler pressure	300 lbf/in2 (2.07 MPa)
Heating surface:
• Firebox	587 sq ft (54.5 m2)
Superheater:;
• Type	Type E
• Heating area	2,703 sq ft (251.1 m2)
Cylinders	Four
Cylinder size	24 in × 30 in (610 mm × 762 mm)
Valve gear	Baker
Maximum speed
Performance figures
Maximum speed	Over 70 mph (110 km/h)
Power output	6,300 hp (4,700 kW)
Tractive effort	114,000 lbf (507.10 kN)
Factor of adh.	3.8
Operators
Career
Operators	Norfolk and Western
Class	A
Numbers	1200–1242
Retired	1958–1959
Preserved	(No. 1218)
Disposition	One preserved, remainder scrapped

The Norfolk and Western A was a class of 43 2-6-6-4 simple articulated steam locomotives built by the railroad's own Roanoke Shops between 1936 and 1950 and operated until the late 1950s. The locomotives hauled fast and heavy freight trains for the railroad and only one has been preserved, No. 1218.

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