Southern Railway Ps-4 class

Specifications
Specifications
Configuration:;
• Whyte	4-6-2 "Pacific"
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Leading dia.	33 in (838 mm)
Driver dia.	73 in (1,854 mm)
Trailing dia.	43 in (1,092 mm)
Wheelbase	13 ft 0 in (3.962 m)
Frame type	Bar
Axle load	61 long tons (62.0 t)
Adhesive weight	182,000 lbf (809.6 kN)
Tender type	3 axle bogie (1926 order), 2 axle bogie (1923 and 1928 orders)
Fuel type	Coal
Fuel capacity	16 long tons (16.3 t)
Water cap.	10,000 imp gal (45,000 L) (1923 order), 14,000 imp gal (64,000 L) (1926 order), 12,000 imp gal (55,000 L) (1928 order)
Firebox:
• Grate area	70.5 sq ft (6.550 m2)
Boiler pressure	200 psi (1,380 kPa)
Feedwater heater	Worthington (1923 order), Elesco (1926 and 1928 orders), Coffin (No. 1409)
Cylinders	Two
Cylinder size	27 in (686 mm) bore; 28 in (711 mm) stroke
Valve gear	Baker (1923 and 1926 orders), Walschaerts (1928 order)

Type and origin
Type and origin
	References:
Power type	Steam
Builder	ALCO Schenectady (1923-1924 order); ALCO Richmond (1926 order); Baldwin Locomotive Works (1928 order)
Build date	1923-1928
Total produced	64

Southern Railway Ps-4 class
Southern Railway Ps-4 class
	ALCO Richmond built Ps-4 No. 1396 built in 1926.
Power type
Type and origin
	References:
Power type	Steam
Builder	ALCO Schenectady (1923-1924 order); ALCO Richmond (1926 order); Baldwin Locomotive Works (1928 order)
Build date	1923-1928
Total produced	64
Configuration:;
Specifications
Configuration:;
• Whyte	4-6-2 "Pacific"
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Leading dia.	33 in (838 mm)
Driver dia.	73 in (1,854 mm)
Trailing dia.	43 in (1,092 mm)
Wheelbase	13 ft 0 in (3.962 m)
Frame type	Bar
Axle load	61 long tons (62.0 t)
Adhesive weight	182,000 lbf (809.6 kN)
Tender type	3 axle bogie (1926 order), 2 axle bogie (1923 and 1928 orders)
Fuel type	Coal
Fuel capacity	16 long tons (16.3 t)
Water cap.	10,000 imp gal (45,000 L) (1923 order), 14,000 imp gal (64,000 L) (1926 order), 12,000 imp gal (55,000 L) (1928 order)
Firebox:
• Grate area	70.5 sq ft (6.550 m2)
Boiler pressure	200 psi (1,380 kPa)
Feedwater heater	Worthington (1923 order), Elesco (1926 and 1928 orders), Coffin (No. 1409)
Cylinders	Two
Cylinder size	27 in (686 mm) bore; 28 in (711 mm) stroke
Valve gear	Baker (1923 and 1926 orders), Walschaerts (1928 order)
Maximum speed
Performance figures
Maximum speed	60–80 mph (97–129 km/h)
Power output	2,624 hp (1,957 kW)
Tractive effort	47,535 lb (21.6 tonnes)
Factor of adh.	3.79
Operators
Career
Operators	Southern Railway, Alabama Great Southern Railroad, Cincinnati, New Orleans and Texas Pacific Railway
Class	Ps-4
Number in class	64
Numbers	SOU No. 1366-1409; AGS No. 6684-6691; CNO&TP No. 6471-6482
Delivered	1923-1928
Withdrawn	1949-1953
Preserved	No. 1401
Disposition	One preserved, remainder scrapped

The Southern Railway Ps-4 was a class of 4-6-2 steam locomotives built for the Southern Railway, as well as its subsidiaries, the Alabama Great Southern Railroad and the Cincinnati, New Orleans and Texas Pacific Railway. The locomotives were notable for their green with gold trim liveries, and have been regarded by Smithsonian curator John H. White Jr. as being "among the most celebrated passenger locomotives operated in the United States...."

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