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The SD39 is a model of 6-axle diesel-electric locomotive built by General Motors Electro-Motive Division between August 1968 and May 1970. 54 were built for American railroads.
In 1966, EMD replaced all their old models with new ones having the new 645 diesel. These included six-axle models SD38,
* FEPASA - 14 SD39-2s numbered 2350-2363; the last seven, 2358–2363, rebuilt as SD39-2M by NRE.
* TRANSAP - 4 SD39-3M locomotives rebuilt by MPI de Mexico numbered D2301-D2304.
SD40 SD40 may refer to:
* Canon PowerShot SD40, a digital camera
* EMD SD40, a diesel-electric locomotive
* South Dakota Highway 40
* SD-40 alcohol, ethanol denatured alcohol, denatured by adding denatonium benzoate
* School District 40 New Westminster, ...
, SDP40 and SD45; the SD39 was added in 1968. All shared standard components including the frame, cab, traction alternator, trucks
A truck or lorry is a motor vehicle designed to transport freight, carry specialized payloads, or perform other utilitarian work. Trucks vary greatly in size, power, and configuration, but the vast majority feature body-on-frame construction ...
, traction motor
A traction motor is an electric motor used for propulsion of a vehicle, such as locomotives, electric vehicle, electric or hydrogen vehicles, or electric multiple unit trains.
Traction (engineering), Traction motors are used in electrically powe ...
s, and air brakes. The difference was the power output: SD38 = from a non-turbocharged V16, SD39 = from a turbocharged V12, SD40 = from a turbocharged V16, and SD45 = from a turbocharged V20. The SD39 had the smallest prime mover and therefore had the most unused space above the frame, inside the hood between the main generator and electrical cabinet, and outside in large end "porches".
Variant
A variant was the SDL39, ordered by theMilwaukee Road
The Chicago, Milwaukee, St. Paul and Pacific Railroad (CMStP&P), better known as the Milwaukee Road , was a Class I railroad that operated in the Midwestern United States, Midwest and Pacific Northwest, Northwest of the United States from 1847 ...
. Shorter and lighter than a stock SD39, these minimized weight per axle.
Original owners
Dash 2 Series
On January 1, 1972, EMD debuted Dash 2 models. No official SD39-2s were built, though the model was catalogued. Some SD39s were rebuilt to Dash 2 specifications, however, and received the SD39-2 designation. Also, BNSF has re-designated some of their SD40-2 locomotives as 'SD39-2s'; it is unknown at this time what mechanical changes have been made to these locomotives.Dispositions
Some of the SD39 model were subsequently resold to other operators including:
* FEPASA - 14 SD39-2s numbered 2350-2363; the last seven, 2358–2363, rebuilt as SD39-2M by NRE.
* TRANSAP - 4 SD39-3M locomotives rebuilt by MPI de Mexico numbered D2301-D2304.
References
* * *Trains Magazine Article December 1968, "A Market Oriented Catalog" by Wallace A. Abbey. The same article appears in Kalmbach's Our GM Scrapbook pages 82–83 subtitle, "Little diesel, big job". SD39 C-C locomotives Diesel–electric locomotives of the United States Railway locomotives introduced in 1968 Freight locomotives Standard-gauge locomotives of the United States 5 ft 6 in gauge locomotives Atchison, Topeka and Santa Fe Railway locomotives Southern Pacific Railroad locomotives {{diesel-loco-stub