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EMD SW7

{{Short description|Model of 1200 hp American diesel switcher}}

{{Infobox locomotive

| name=EMD SW7

| image=Baltimore and Ohio 9624 (TR4) Cow and Calf at Riverside Yard, Baltimore (22341847029).jpg

| caption=Baltimore and Ohio {{Abbr|No.|Number}} 9624 TR4 cow–calf set at Riverside Yard, Baltimore, in 1969

| powertype=Diesel–electric

| gauge={{track gauge|ussg|allk=on}}

| builder=General Motors Electro-Motive Division (EMD)

| builddate=October 1949 – January 1951

| buildmodel=SW7, TR4

| aarwheels=B-B

| uicclass=Bo′Bo′

| cylindercount=12

| primemover=EMD 12-567BA

| enginetype= V12 diesel

| aspiration=Roots-type blower

| poweroutput= {{convert|1200|hp|abbr=on|sigfig=3}}

| totalproduction=SW7: 489
TR4: 30

}}

The EMD SW7 was a diesel switcher locomotive built by General Motors Electro-Motive Division between October 1949 and January 1951.{{Cite book|last=Schafer|first=Mike|url=https://www.worldcat.org/oclc/38738930|title=Vintage diesel locomotives|date=1998|publisher=Motorbooks International|isbn=0-7603-0507-2|location=Osceola, WI|pages=25|oclc=38738930}} It was powered by a {{convert|1200|hp|lk=on|sigfig=3}}12-567A engine.{{Cite book|last=Solomon|first=Brian|url=https://books.google.com/books?id=JubUBAAAQBAJ&dq=SW7+EMD+567A&pg=PA231|title=GE and EMD Locomotives: The Illustrated History|date=August 2014|publisher=Voyageur Press|isbn=978-0-7603-4612-9|pages=231|language=en}} The SW7 replaced the earlier 1,000 horsepower NW2 switcher in EMD's catalog.{{Cite book|last=Marre|first=Louis A.|url=https://www.worldcat.org/oclc/34531120|title=Diesel locomotives : the first 50 years : a guide to diesels built before 1972|date=1995|publisher=Kalmbach Pub. Co|isbn=0-89024-258-5|location=Waukesha, WI|pages=30–31|oclc=34531120}} A total of 489 SW7 locomotives were produced. The majority of the SW7s were built by EMD Plant #3 in Cleveland, Ohio.{{Citation needed|date=August 2021}} In addition, 30 TR4 cow–calf paired sets were produced.

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

Original buyers

class="wikitable"

! Railroad !! Quantity !! Road numbers

Arkansas and Louisiana Missouri Railwaystyle="text-align:center;" |1style="text-align:center;" |11
Atlantic Coast Line Railroadstyle="text-align:center;" |9style="text-align:center;" |643–651
Central Railroad of New Jerseystyle="text-align:center;" |4style="text-align:center;" |1080–1083
Charleston and Western Carolina Railwaystyle="text-align:center;" |2style="text-align:center;" |800–801
Chesapeake and Ohio Railwaystyle="text-align:center;" |26style="text-align:center;" |5214–5239
Chicago and Eastern Illinois Railroadstyle="text-align:center;" |6style="text-align:center;" |126–131
Chicago and Eastern Illinois (Chicago Heights Terminal and Transfer Railroad)style="text-align:center;" |2style="text-align:center;" |132–133
Chicago and Illinois Western Railroadstyle="text-align:center;" |3style="text-align:center;" |101–103
Chicago, Burlington and Quincy Railroadstyle="text-align:center;" |20style="text-align:center;" |9249–9268
Chicago, Milwaukee, St. Paul and Pacific Railroadstyle="text-align:center;" |1style="text-align:center;" |1646
Clinchfield Railroadstyle="text-align:center;" |6style="text-align:center;" |350–355
Colorado and Southern Railwaystyle="text-align:center;" |1style="text-align:center;" |154
Conemaugh and Black Lick Railroadstyle="text-align:center;" |15style="text-align:center;" |103–117
Cornwall Railroadstyle="text-align:center;" |3style="text-align:center;" |120–122
Detroit and Toledo Shore Line Railroadstyle="text-align:center;" |3style="text-align:center;" |116–118
Detroit Terminal Railroadstyle="text-align:center;" |1style="text-align:center;" |116
Detroit, Toledo and Ironton Railroadstyle="text-align:center;" |5style="text-align:center;" |920–924
Erie Railroadstyle="text-align:center;" |6style="text-align:center;" |428–433
Great Northern Railwaystyle="text-align:center;" |11style="text-align:center;" |163–170, 11–13
Illinois Central Railroadstyle="text-align:center;" |50style="text-align:center;" |9300–9319, 9400–9429
Kansas City Southern Railwaystyle="text-align:center;" |10style="text-align:center;" |1300–1309
Kansas City Southern Railway (Louisiana and Arkansas Railway)style="text-align:center;" |6style="text-align:center;" |1310–1315
Lakeside and Marblehead Railroadstyle="text-align:center;" |1style="text-align:center;" |12
Lehigh Valley Railroadstyle="text-align:center;" |5style="text-align:center;" |220–224
Louisiana Midland Railwaystyle="text-align:center;" |1style="text-align:center;" |10
Louisville and Nashville Railroadstyle="text-align:center;" |22style="text-align:center;" |2245–2266
Maine Central Railroadstyle="text-align:center;" |3style="text-align:center;" |331–333
Missouri Pacific Railroadstyle="text-align:center;" |5style="text-align:center;" |9142–9146
Monessen Southwestern Railwaystyle="text-align:center;" |1style="text-align:center;" |21
Montour Railroadstyle="text-align:center;" |1style="text-align:center;" |72
Nashville, Chattanooga and St. Louis Railwaystyle="text-align:center;" |10style="text-align:center;" |24–33
New York Central Railroadstyle="text-align:center;" |34style="text-align:center;" |8851–8855, 8880–8897, 8911–8921
New York Central (Indiana Harbor Belt Railroad)style="text-align:center;" |40style="text-align:center;" |8835–8850, 8856–8879
New York Central (Chicago River and Indiana Railroad)style="text-align:center;" |6style="text-align:center;" |8898–8903
New York Central (Peoria and Eastern Railway)style="text-align:center;" |7style="text-align:center;" |8904–8910
New York, Chicago and St. Louis Railroad (“Nickel Plate Road”)style="text-align:center;" |3style="text-align:center;" |230–232
Northern Pacific Railwaystyle="text-align:center;" |8style="text-align:center;" |107–114
Pennsylvania Railroadstyle="text-align:center;" |48style="text-align:center;" |8861–8868, 8871–8872, 9358–9395
Peoria and Pekin Union Railwaystyle="text-align:center;" |5style="text-align:center;" |406–410
Phelps Dodge Corporation (New Cornelia Branch Mine)style="text-align:center;" |1style="text-align:center;" |6
Philadelphia, Bethlehem and New England Railroadstyle="text-align:center;" |4style="text-align:center;" |31–34
River Terminal Railwaystyle="text-align:center;" |2style="text-align:center;" |61–62
Southern Railway (Alabama Great Southern Railroad)style="text-align:center;" |5style="text-align:center;" |6505–6509
Southern Railway (Cincinnati, New Orleans and Texas Pacific Railway)style="text-align:center;" |14style="text-align:center;" |6060–6073
Southern Railway (Georgia Southern and Florida Railway)style="text-align:center;" |4style="text-align:center;" |8200–8203
Southern Railway (New Orleans and North Eastern Railway)style="text-align:center;" |12style="text-align:center;" |6852–6863
St. Louis Southwestern Railway (“Cotton Belt”)style="text-align:center;" |4style="text-align:center;" |1054–1057
St. Louis-San Francisco Railway (“Frisco”)style="text-align:center;" |5style="text-align:center;" |300–304
Texas and Pacific Railwaystyle="text-align:center;" |4style="text-align:center;" |1020–1023
Union Pacific Railroadstyle="text-align:center;" |25style="text-align:center;" |1800–1824
Union Railroadstyle="text-align:center;" |4style="text-align:center;" |571–574
Wabash Railroadstyle="text-align:center;" |8style="text-align:center;" |355–362
Weyerhaueser Timber Companystyle="text-align:center;" |2style="text-align:center;" |300–301
Woodward Iron Companystyle="text-align:center;" |2style="text-align:center;" |50–51
Youngstown and Southern Railwaystyle="text-align:center;" |2style="text-align:center;" |70–71
Total489

= TR4 =

class="wikitable"

!Railroad !! Quantity A units !! Quantity B units !! Road numbers A units !! Road numbers B units!! Notes

Atchison, Topeka and Santa Fe Railwaystyle="text-align:center;" |2style="text-align:center;" |2style="text-align:center;" |2418L–2419Lstyle="text-align:center;" |2418A–2419A
Belt Railway of Chicagostyle="text-align:center;" |5style="text-align:center;" |5style="text-align:center;" |502A–506Astyle="text-align:center;" |502B–506B
Chesapeake and Ohio Railwaystyle="text-align:center;" |2style="text-align:center;" |2style="text-align:center;" |6001A–6002Astyle="text-align:center;" |6001B–6002B
Chicago, Milwaukee, St. Paul and Pacific Railroadstyle="text-align:center;" |6style="text-align:center;" |6style="text-align:center;" |2001A–2006Astyle="text-align:center;" |2001B–2006B
Total1515

External links

  • {{commons category-inline|EMD SW7 locomotives}}

See also

References

  • * Kristopans, Andre J. http://utahrails.net/ajkristopans/SWITCHERS201Aand567.php Retrieved October 7, 2014.This is a compilation of EMD Product Reference Data{{Unreliable source?|date=July 2020}}
  • General Motors Electro-Motive Division Service Department "Locomotive Reference Data" published January 1, 1959, 286 pages.

{{Diesel_Switchers}}

Category:B-B locomotives

SW0007

Category:Diesel–electric locomotives of the United States

Category:Railway locomotives introduced in 1949

Category:Locomotives with cabless variants

Category:Standard-gauge locomotives of the United States

Category:Shunting locomotives

Category:Baltimore and Ohio locomotives

Category:Chesapeake and Ohio locomotives

Category:Chicago, Burlington and Quincy locomotives

Category:Erie Railroad locomotives

Category:Great Northern Railway (United States) locomotives

Category:Illinois Central locomotives

Category:Maine Central Railroad locomotives

Category:Milwaukee Road locomotives

Category:New York Central Railroad locomotives

Category:Nickel Plate Road locomotives

Category:Northern Pacific Railway locomotives

Category:Pennsylvania Railroad locomotives

Category:Diesel locomotives of Southern Railway (U.S.)

Category:St. Louis–San Francisco Railway locomotives

Category:Union Pacific Railroad locomotives

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