EMD SW7
Baltimore and Ohio No. 9624 TR4 cow-calf set at Riverside Yard, Baltimore, in 1969
Type and origin
Power typeDiesel-electric
BuilderGeneral Motors Electro-Motive Division (EMD)
ModelSW7, TR4
Build dateOctober 1949 – January 1951
Total producedSW7: 489
TR4: 15 sets
Specifications
Gauge4 ft 8+1⁄2 in (1,435 mm) standard gauge
Prime moverEMD 12-567BA[1]
Engine typeV12 diesel
AspirationRoots-type supercharger
Cylinders12
Performance figures
Power output1,200 hp (895 kW)

The EMD SW7 was a diesel switcher locomotive built by General Motors Electro-Motive Division between October 1949 and January 1951.[2] It was powered by a 1,200 horsepower (895 kW)12-567A engine.[1] The SW7 replaced the earlier 1,000 horsepower NW2 switcher in EMD's catalog.[3] A total of 489 SW7 locomotives were produced. The majority of the SW7s were built by EMD Plant #3 in Cleveland, Ohio. In addition, 15 TR4 cow-calf paired sets were produced.[3]

SW7 production was discontinued in 1951 in favor of the new SW9.[2]

Original buyers

RailroadQuantityRoad numbers
Arkansas and Louisiana Missouri Railway111
Atlantic Coast Line Railroad9643–651
Central Railroad of New Jersey41080–1083
Charleston and Western Carolina Railway2800–801
Chesapeake and Ohio Railway265214–5239
Chicago and Eastern Illinois Railroad6126–131
Chicago and Eastern Illinois (Chicago Heights Terminal and Transfer Railroad)2132–133
Chicago and Illinois Western Railroad3101–103
Chicago, Burlington and Quincy Railroad209249–9268
Chicago, Milwaukee, St. Paul and Pacific Railroad11646
Clinchfield Railroad6350–355
Colorado and Southern Railway1154
Conemaugh and Black Lick Railroad15103–117
Cornwall Railroad3120–122
Detroit and Toledo Shore Line Railroad3116–118
Detroit Terminal Railroad1116
Detroit, Toledo and Ironton Railroad5920–924
Erie Railroad6428–433
Great Northern Railway11163–170, 11–13
Illinois Central Railroad509300–9319, 9400–9429
Kansas City Southern Railway101300–1309
Kansas City Southern Railway (Louisiana and Arkansas Railway)61310–1315
Lakeside and Marblehead Railroad112
Lehigh Valley Railroad5220–224
Louisiana Midland Railway110
Louisville and Nashville Railroad222245–2266
Maine Central Railroad3331–333
Missouri Pacific Railroad59142–9146
Monessen Southwestern Railway121
Montour Railroad172
Nashville, Chattanooga and St. Louis Railway1024–33
New York Central Railroad348851–8855, 8880–8897, 8911–8921
New York Central (Indiana Harbor Belt Railroad)408835–8850, 8856–8879
New York Central (Chicago River and Indiana Railroad)68898–8903
New York Central (Peoria and Eastern Railway)78904–8910
New York, Chicago and St. Louis Railroad (“Nickel Plate Road”)3230–232
Northern Pacific Railway8107–114
Pennsylvania Railroad488861–8868, 8871–8872, 9358–9395
Peoria and Pekin Union Railway5406–410
Phelps Dodge Corporation (New Cornelia Branch Mine)16
Philadelphia, Bethlehem and New England Railroad431–34
River Terminal Railway261–62
Southern Railway (Alabama Great Southern Railroad)56505–6509
Southern Railway (Cincinnati, New Orleans and Texas Pacific Railway)146060–6073
Southern Railway (Georgia Southern and Florida Railway)48200–8203
Southern Railway (New Orleans and North Eastern Railway)126852–6863
St. Louis Southwestern Railway (“Cotton Belt”)41054–1057
St. Louis-San Francisco Railway (“Frisco”)5300–304
Texas and Pacific Railway41020–1023
Union Pacific Railroad251800–1824
Union Railroad4571–574
Wabash Railroad8355–362
Weyerhaueser Timber Company2300–301
Woodward Iron Company250–51
Youngstown and Southern Railway270–71
Total489

See also

References

  1. 1 2 Solomon, Brian (August 2014). GE and EMD Locomotives: The Illustrated History. Voyageur Press. p. 231. ISBN 978-0-7603-4612-9.
  2. 1 2 Schafer, Mike (1998). Vintage diesel locomotives. Osceola, WI: Motorbooks International. p. 25. ISBN 0-7603-0507-2. OCLC 38738930.
  3. 1 2 Marre, Louis A. (1995). Diesel locomotives : the first 50 years : a guide to diesels built before 1972. Waukesha, WI: Kalmbach Pub. Co. pp. 30–31. ISBN 0-89024-258-5. OCLC 34531120.


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