USRA Heavy Pacific

USRA Heavy Pacific
Technical specifications
Manufacturer(s)	American Locomotive Company (10+0) Baldwin Locomotive Works (10+11) Lima Locomotive Works (0+6)
Total produced	Originals: 20 Copies: 88
Classification	ERIE: K-5 B&O: P-7 SOU: Ps-4 WPR: P-74
Rail gauge	4 Foot 8 Inches
Valve gear	Baker
Cylinders	Two, outside
Boiler pressure	200 psi (1.38 MPa)
Bore stroke	27 in × 28 in (686 mm × 711 mm)
Firegrate area	70.8 sq ft (6.58 m2)
Heating area	882 sq ft (81.9 m2)
Performance figures
Tractive effort	43,800 lbf (194.83 kN)
Factor of adhesion	4.1
Disposition details
Preserved	Atlanta and West Point No. 290, B&O P7 #5300, and Southern Railway Ps-4 No. 1401
Disposition	Three Preserved, Remainder scrapped

The USRA Heavy Pacific was a USRA standard class of steam locomotive designed under the control of the United States Railroad Administration, the nationalized railroad system in the United States during World War I. This was the standard heavy passenger locomotive of the USRA types and was 4-6-2 wheel arrangement in the Whyte notation, or 2′C1′ in UIC classification.

Roster fleet

Original locomotives

A total of 20 locomotives were built under USRA control, with the production split between the Baldwin Locomotive Works and the American Locomotive Company's Richmond plant; these were sent to the following railroads:

Table of original USRA allocation

Railroad	Quantity	Class	Road numbers	Built	Notes	Retired
Erie Railroad (ERIE)	20	K-5	2915–2934	1919	Ten K-5-As were also built as copies (Nos. 2935-2944) in 1923 and a K-5-B (No. 2960) in 1926 by Baldwin.	1950-1952

Locomotive copies

Other post-USRA derivatives include the Baltimore and Ohio Class P-7 and the Southern Railway Class Ps-4, the former having larger 80-inch diameter driving wheels, higher tractive effort, and increased boiler pressure, and the latter with smaller 73-inch diameter driving wheels, larger cabs, feedwater heaters, and later batches given larger tenders.

Table of USRA copies

Railroad	Quantity	Class	Road numbers	Built	Notes	Retired	Photograph
Baltimore & Ohio (B&O)	20	P-7	5300-5319	1927	Built by Baldwin.	1958
Erie Railroad (ERIE)	10	K-5a	2935-2944
Southern Railway (SOU)	64	Ps-4	1366-1409, 6471-6482, 6675-6691	1923-1928	Thirty-six (Nos. 1366-1392, 6471-6475, and 6684-6687) built between 1923 and 1924 at ALCO's Schenectady Works. Twenty-two (Nos. 1393-1404, 6476-6482, and 6688-6691) built in 1926 at ALCO's Richmond Works. The last five (Nos. 1405-1409) built in 1928 by Baldwin.	1949-1953
West Point Route (WPR)	2	P-74	190 & 290	1926	Nos. 190 and 290 were both built for the Western Railway of Alabama (WRA) and the Atlanta and West Point Railroad (A&WP), respectively.	1954
Total	88

Three copies of the USRA Heavy Pacifics were preserved, those three survivors are Atlanta and West Point No. 290 which was built by the Lima Locomotive Works in 1926, ran excursions from 1989 to 1992 and is now under cosmetic restoration at the Southeastern Railway Museum in Duluth, Georgia, the B&O P7 #5300 at the B&O Railroad Museum in Baltimore, and Southern Railway Class Ps-4 No. 1401 at the National Museum of American History in Washington, D.C. File:Usra.jpg

Steam Locomotives of the United States Railroad Administration (USRA).
Switchers	0-6-0 • 0-8-0
Light	2-8-2 • 2-10-2 • 4-6-2 • 4-8-2
Heavy	2-8-2 • 2-10-2 • 4-6-2 • 4-8-2
Articulated	2-6-6-2 • 2-8-8-2