The following is a list of

locomotive A locomotive or engine is a rail transport vehicle that provides the motive power for a train. If a locomotive is capable of carrying a payload, it is usually rather referred to as a multiple unit, motor coach, railcar or power car; the us ...

s produced by the Electro-Motive Corporation (EMC), and its successors

General Motors The General Motors Company (GM) is an American multinational automotive manufacturing company headquartered in Detroit, Michigan, United States. It is the largest automaker in the United States and was the largest in the world for 77 years bef ...

Electro-Motive Division (GM-EMD) and

Electro-Motive Diesel Progress Rail Locomotives, doing business as Electro-Motive Diesel (EMD), is an American manufacturer of diesel-electric locomotives, locomotive products and diesel engines for the rail industry. The company is owned by Caterpillar through its su ...

(EMD).

Streamlined power cars and early experimental locomotives

EMC participated in the construction of a number of motorized railcars, integrated streamliner trainsets, and experimental locomotives in the 1930s. Most of these were short production runs (one, two, or four units) that were used by a single railroad. These consisted of Winton prime movers and General Electric generating, control, and transmission components inside a carbody whose assembly was subcontracted to another manufacturer, since EMC did not commence regular road locomotive production until 1937.

Switchers (SW/NW/SC/NC/MP)

The "S" designation originally stood for six hundred horsepower and the "N" designation for nine hundred horsepower, although they were used for the more general designation of smaller and larger engine models after the more powerful 567 model engines replaced the Winton engines. The "C" designation stood for cast frame locomotives and the "W" designation for welded frame locomotives. EMC standardized on welded frames after 1939. The "TR" designation stood for transfer locomotives. The SC and SW switchers were the first locomotives produced in EMC's new factory after its completion in 1936. The pre-SC and Model 90 switchers were development design locomotives outshopped in 1935.

Passenger cab units (E)

Freight cab units (F)

Industrial locomotives

Military locomotives

Four-axle "Branch Line" series roadswitchers (BL)

Four-axle roadswitchers or General Purpose Locomotives (GP)

Six-axle roadswitchers or Special Duty Locomotives (SD)

Six-Axle Road Switcher Production Timeline

DateFormat = mm/dd/yyyy ImageSize = width:1000 height:auto barincrement:20 Period = from:01/01/1950 till:06/01/2020 TimeAxis = orientation:horizontal PlotArea = right:30 left:0 bottom:120 top:5 Colors = id:barcolor value:rgb(0.99,0.7,0.7) id:line value:black id:bg value:white id:pm567_16 value:rgb(0.9,1,0.9) Legend:EMD_16-567 id:pm645_16 value:rgb(0.7,1,0.7) Legend:EMD_16-645 id:pm645_12 value:rgb(1,1,0.7) Legend:EMD_12-645 id:pm645_20 value:rgb(1,1,0.5) Legend:EMD_20-645 id:pm710_16 value:rgb(0.8,0.8,1) Legend:EMD_16-710 id:pm710_20 value:rgb(0.8,0.7,0.8) Legend:EMD_20-710 id:pm265_16 value:rgb(1,0.5,0.5) Legend:EMD_16-265 id:pm1010_16 value:rgb(1,0.7,0.7) Legend:EMD_12-1010 PlotData= width:20 textcolor:black shift:(5,-5) anchor:from fontsize:s bar:1 color:pm567_16 from:02/01/1952 till:11/30/1953 text: SD7 (Feb 1952 – Nov 1953, 188 units produced) bar:2 color:pm567_16 from:01/01/1954 till:06/30/1959 text: SD9 (Jan 1954 – June 1959, 515 units produced) bar:3 color:pm567_16 from:04/01/1960 till:03/31/1963 text: SD18 (Apr 1960 – Mar 1963, 114 units produced) bar:4 color:pm567_16 from:07/01/1958 till:03/31/1963 text: SD24 (July 1958 – Mar 1963, 179 A-units produced; 45 B-units produced) bar:5 color:pm567_16 from:07/01/1965 till:09/30/1965 text: SD28 (July 1965 – Sep 1965, 12 units produced) bar:6 color:pm567_16 from:06/01/1964 till:01/31/1966 text: SD35 (June 1964 – Jan 1966, 360 units produced) bar:7 color:pm567_16 from:07/01/1964 till:09/30/1965 text: SDP35 (July 1964 – Sep 1965, 35 units produced) bar:8 color:pm645_16 from:05/01/1967 till:10/31/1971 text: SD38 (May 1967 – Oct 1971, 53 units produced) bar:9 color:pm645_16 from:06/01/1971 till:10/31/1971 text: SD38AC (Jun 1971 – Oct 1971, 15 units produced) bar:10 color:pm645_16 from:01/01/1972 till:12/31/1979 text:

SD38-2 The EMD SD38-2 is a model of six-axle diesel-electric locomotive built by General Motors Electro-Motive Division (EMD) from 1972 to 1979. EMD built 90 of these medium road-switchers, which were used in both yard and mainline roles. Part of the ...

(1972 – 1979, 83 units produced) bar:11 color:pm645_12 from:08/01/1968 till:05/31/1970 text: SD39 (Aug 1968 – May 1970, 54 units produced) bar:12 color:pm645_12 from:03/01/1969 till:04/30/1969 text: SDL39 (Mar 1969 – Nov 1972, 10 units; Nov 1972, 5 units produced) bar:12 color:pm645_12 from:11/01/1972 till:11/30/1972 bar:13 color:pm645_16 from:01/01/1964 till:12/31/1965 text: SD40X (1964 – 1965, 9 units produced) bar:14 color:pm645_16 from:01/01/1966 till:08/31/1972 text:

SD40 SD40 may refer to: * Canon PowerShot SD40, a digital camera * EMD SD40, a diesel-electric locomotive * South Dakota Highway 40 South Dakota Highway 40 (SD 40) is a state highway in southwestern part of the US state of South Dakota. The highw ...

(Jan 1966 – Aug 1972, 1,268 units produced) bar:15 color:pm645_16 from:01/01/1969 till:12/31/1970 text: SD40A (1969 – 1970, 18 units produced) bar:16 color:pm645_16 from:06/01/1966 till:05/31/1970 text: SDP40 (June 1966 – May 1970, 20 units produced) bar:17 color:pm645_16 from:04/01/1974 till:07/31/1980 text: SD40T-2 (June 1974 – July 1980, 312 units produced) bar:18 color:pm645_16 from:01/01/1972 till:02/28/1986 text:

SD40-2 The EMD SD40-2 is a C-C diesel-electric locomotive built by EMD from 1972 to 1989. The SD40-2 was introduced in January 1972 as part of EMD's '' Dash 2'' series, competing against the GE U30C and the ALCO Century 630. Although higher-horsepowe ...

(Jan 1972 – Feb 1986, 3,949 units produced) bar:19 color:pm645_16 from:05/01/1975 till:12/30/1980 text: SD40-2W (May 1975 – Dec 1980, 123 units produced) bar:20 color:pm645_16 from:04/01/1978 till:05/31/1978 text: SD40-2S (Apr 1978 – May 1978, 5 units produced; Nov 1980, 4 units produced) bar:20 color:pm645_16 from:11/01/1980 till:11/30/1980 bar:21 color:pm645_20 from:12/01/1965 till:12/31/1971 text:

SD45 The SD45 is a six-axle diesel-electric locomotive built by General Motors Electro-Motive Division between 1965 and 1971. It has an EMD 645E3 twenty- cylinder engine generating on the same frame as the SD38, SD39, SD40, and SDP40. As of 2022, ...

(Dec 1965 – Dec 1971, 1,260 units produced) bar:22 color:pm645_20 from:05/01/1967 till:08/31/1970 text: SDP45 (May 1967 – Aug 1970, 52 units produced) bar:23 color:pm645_20 from:02/01/1972 till:06/30/1975 text: SD45T-2 (Feb 1972 – June 1975, 247 units produced) bar:24 color:pm645_20 from:01/01/1972 till:12/31/1974 text: SD45-2 (1972 – 1974, 136 units produced) bar:25 color:pm645_16 from:10/01/1980 till:12/31/1980 text: SD50S (1980, 6 units produced) bar:26 color:pm645_16 from:12/01/1980 till:01/31/1986 text: SD50 (Nov 1984 – May 1985, 421 units produced) bar:27 color:pm710_16 from:01/01/1984 till:12/31/1995 text: SD60-series (1984 – 1995, 1,138 units produced) bar:28 color:pm710_16 from:01/01/1992 till:06/30/2005 text: SD70-series (1992 – 2005, 2,915 units produced) bar:29 color:pm710_16 from:01/01/1994 till:12/31/1994 text: SD75-series (1994, 207 units produced) bar:30 color:pm710_20 from:01/01/1996 till:12/31/1996 text: SD80MAC (1995 – 1996, 30 units produced) bar:31 color:pm710_16 from:05/01/1995 till:01/31/1999 text: SD9043MAC (Oct 1996 – Jan 1999, 370 units produced) bar:32 color:pm265_16 from:08/01/1996 till:06/30/2005 text: SD90MAC-H (1996 – 2002, 44 units produced) bar:33 color:pm710_16 from:04/01/2003 till:12/31/2016 text:

SD70ACe The EMD SD70 is a series of diesel-electric locomotives produced by the US company Electro-Motive Diesel in response to the GE Dash 9-44CW. Production commenced in late 1992 and since then over 5,700 units have been produced; most of these are th ...

(Apr 2003 – present, 2091 units produced as of 2020) bar:34 color:pm710_16 from:07/01/2005 till:12/31/2015 text: SD70M-2 (Oct 2004 – present, 331 units produced as of 2020) bar:35 color:pm1010_16 from:07/01/2015 till:end shift:(-200, -5) text: SD70ACe-T4 (Oct 2015 – present, 105 units produced as of 2020) ScaleMajor = gridcolor:line unit:year increment:5 start:01/01/1950 ScaleMinor = gridcolor:line unit:year increment:1 start:01/01/1951 Legend = orientation:vertical position:bottom columns:4 TextData = fontsize:L textcolor:black pos:(370,30) # tabs:(0-center) text:"Six-Axle Road Switcher Production Timeline"

Eight-axle roadswitchers

Cowl units

Electric locomotives

Export and narrow gauge locomotives

Aftermarket conversions

References

Notes

Bibliography

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External links

The History of EMD Diesel Engines
{{DEFAULTSORT:List Of Gm-Emd Locomotives ! GM-EMD locomotives Articles which contain graphical timelines !