Southern Railway Ps-4 Class Pacific Streamlined Steam Locomotive

The Southern Railway's Class Ps-4 Pacific No. 1380 was built by Alco in 1923. It was streamlined in 1941 by Otto Kuhler for use on the Tennessean train, which connected New York with Memphis, Tennessee.

The bullet-nose streamlining designed by Otto Kuhler was similar to the bullet-style of the B&O's Royal Blue. The Southern's Tennessean service operated between Washington, DC, and Monroe, Virginia, and connected with the Norfolk and Western Railway, who had assigned its streamlined J class engines to its connecting lines. When the Southern finally dieselized the Tennesean, No. 1308 joined the remainder of the Ps-4s assigned elsewhere on the road, though it retained its streamlining.

Southern Railway No. 1401, a bright green Pacific locomotive without the streamlining, is displayed in the Smithsonian Museum.

Southern Ps-4 Overview

Type and Origin
Power type: Steam
Builder: ALCO Schenectady (1923 order)
Builder: ALCO Richmond (1926 order)
Builder: Baldwin Locomotive Works (1928 order)
Build date: 1923-1928
Total produced: 64
Total Units Streamlined: 1
Road Number Streamlined Unit: 1380
​ • Whyte 4-6-2 "Pacific"
Gauge: 4 ft 8 1⁄2 in (1,435 mm) standard gauge
Driver diameter: 73 in (1,850 mm)
Wheelbase: 13 ft 0 in (3.962 m)
Frame type: Bar
Axle load: 68.32 tons (61 long tons) (62.0 t)
Adhesive weight: 182,000 lbf (809.6 kN)
Tender type: 3 axle trucks (1926 order), 2 axle trucks (1923 and 1928 orders)
Fuel type: Coal
Fuel capacity: 17.92 tons (16 long tons) (16.3 t)
Water capacity: 16,813.299 U.S. gallons (14,000 imp gal) (64,000 l) (1926 order), 14411.399 U.S. gallons (12,000 imp gal) (55,000 l) (1928 order)
 • Firegrate 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 (SR no. 1409 only)
Cylinders: Two
Cylinder size: 27 in (686 mm) bore, 28 in (711 mm) stroke
Valve gear Baker, Walschaerts (1928 order)
Performance figures
Tractive effort: 47,500 lbf (211.3 kN)
Operators: Southern Railway, Alabama Great Southern Railroad, Cincinnati, New Orleans and Texas Pacific Railway
Class: Class Ps-4
Number in class: 64
Road Numbers: SR 1375-1409, AGS 6684-6690, CNO&TP 6471-6482
Delivered: 1923-1928
Withdrawn: 1949 - 1953
Preserved: SR No. 1401
Disposition: one preserved, remainder scrapped.

See also:

Southern Class Ps-4 Pacific

The Tennessean

Southern Railway

Streamlined Steam Locomotives

Steam Locomotives


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Southern 1380 was a rebuild of a 1923 Ps4 Pacific. The streamlining was done by Otto Kuhler. The 1380 pulled The Tennessean from Washington D.C. to Monroe Virginia.