EMD SD38-2

{{Short description|North American class of diesel-electric locomotive}}

{{More citations needed|date=August 2021}}

{{Infobox locomotive

| name = EMD SD38-2

| image = LLPX SD38-2 2808.jpg

| alt =

| caption = LLPX 2808 in February 2005

| powertype = Diesel-electric

| designer =

| builder = {{ubl|General Motors Electro-Motive Division (EMD)|General Motors Diesel, Canada}}

| ordernumber =

| serialnumber =

| buildmodel = SD38-2

| builddate = 1972–1979

| totalproduction = 90

| rebuilder =

| rebuilddate =

| numberrebuilt =

| website =

| aarwheels = C-C

| uicclass = Co′Co′

| Britishclass =

| driver =

| gauge = {{track gauge|ussg|allk=on}}{{efn|Except for two units built for the {{ill|Jari Railway|pt|Estrada de Ferro Jari}} in Brazil, which were built to a {{Track gauge|63in|lk=on}} gauge}}

| trucks =

| bogies =

| leadingdiameter =

| wheeldiameter = {{convert|3|ft|4|in|m|3|abbr=on}}

| trailingdiameter =

| minimumcurve =

| wheelbase =  

| engine total =

| leading =

| drivers =

| coupled =

| trailing =

| truck = {{convert|13|ft|7|in|m|abbr=on}}

| pivotcentres = {{convert|43|ft|3.5|in|3|abbr=on}} between bolsters;

| wheelspacing =

| over couplers =

| over bufferbeams =

| body =

| width = {{convert|10|ft|3+1/8|in|m|2|abbr=on}} over handrail supports

| height = {{convert|15|ft|7+1/4|in|m|2|abbr=on}} over cooling fan guard

| axleload =

| leadingbogie/pony =

| weightondrivers =

| trail bogie/pony =

| locoweight = {{convert|368,000|lb|kg|abbr=on}}

| fueltype = Diesel

| fuelcap = {{convert|3,200|or|4,000|USgal|L impgal|abbr=on}}

| lubecap =

| coolantcap =

| watercap =

| sandcap =

| powersupply =

| consumption =

| watercons =

| primemover = EMD 16-645E

| rpmrange =

| rpmrange low =

| rpmrange idle = 200

| rpmrange max = 950

| enginetype = V16 Two-stroke diesel

| aspiration = Roots-blown

| displacement =

| alternator = AR10E1-D14 generator-alternator

| generator = AR10E1-D14 generator-alternator

| tractionmotors = 6 × D77/78 DC

| t/m amps 1 hr =

| t/m amps cont =

| headendpower =

| cylindercount = 16

| cylindersize =

| transmission =

| gear ratio = 62:15

| multipleworking =

| trainheating =

| locobrakes = Air, Dynamic

| dynamicpeakeffort =

| locobrakeforce =

| trainbrakes = Air

| reservoircap =

| compressorcap =

| exhaustercap =

| coupling =

| maxspeed = {{convert|65|mph|kph|abbr=on}}

| poweroutput = {{convert|2,000|hp|kW|abbr=on|lk=on}}

| poweroutput start =

| poweroutput 1 hr =

| poweroutput cont =

| tractiveeffort =

| t/e starting =

| t/e 1 hr =

| t/e continuous =

| factorofadhesion =

| f/adh starting =

| f/adh 1 hr =

| f/adh continuous =

| safety = Deadman

| operator =

| operatorclass =

| powerclass =

| numinclass =

| fleetnumbers =

| officialname =

| nicknames =

| axleloadclass =

| locale = North America, South America

| deliverydate =

| firstrundate =

| lastrundate =

| retiredate =

| withdrawndate =

| preservedunits =

| restoredate =

| scrapdate =

| currentowner =

| disposition =

| notes =

}}

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 EMD Dash 2 line, the SD38-2 was an upgraded SD38 with modular electronic control systems, HT-C trucks, and many other detail improvements. The locomotive's power was provided by an EMD 16-645E 16-cylinder engine, which could generate {{convert|2,000|hp|kW|abbr=off|lk=on}}. These units were constructed with either {{convert|3,200|or|4,000|USgal|L impgal|abbr=on}} fuel tanks and were available with or without dynamic brakes. It shared the same {{convert|64|ft|8|in|m|2|adj=on}} frame as the SD40-2 and SD45-2, which gives it a length over couplers of {{convert|68|ft|10|in|m|2}}.