Editing EMC E3 (section)

{{Short description|American diesel-passenger locomotive}}
{{more citations needed|date=June 2021}}
{{more footnotes needed|date=July 2016}}
{{Infobox locomotive
| name=EMC E3
| powertype=Diesel-electric
| image=Atlantic Coast Line 501.jpg
| caption=[[Atlantic Coast Line 501|ACL #501]] at the North Carolina Transportation Museum. On the down left is lettering ''[[Champion (train)|The Champion]]''.
| builder=[[Electro-Motive Diesel|Electro-Motive Corporation]] (EMC)
| buildmodel=E3
| builddate= September 1938 – June 1940
| totalproduction=17 [[A unit]]s, 2 [[B unit]]s
| aarwheels=A1A-A1A
| gauge={{track gauge|ussg}}
| trucks = EMC [[Blomberg B|Blomberg]] A-1-A passenger
| wheeldiameter = {{convert|36|in|mm|0|abbr=on}}
| minimumcurve = 21° ({{convert|274.37|ft|m|2|abbr=on|disp=or}} radius)
| wheelbase = {{convert|57|ft|1|in |m|2|abbr=on}}
| length = {{convert|70|ft|4|in|m|2|abbr=on}} over [[Janney coupler|coupler]] [[Headstock (rolling stock)#Length over headstocks|pulling faces]]
| width = {{convert|10|ft|7|in|m|2|abbr=on}}
| height = {{convert|15|ft|10|in|m|2|abbr=on}}
| locoweight = {{convert|308400|lb|abbr=on}} 
| fuelcap = {{convert|1200|USgal|impgal L|abbr=on}}
| primemover= (2) [[Electro-Motive Diesel|EMC]] [[EMD 567|12-567C]]
| rpmrange = 800 max
| enginetype= (2) [[V12 engine|V12]] [[Two-stroke diesel engine|Two-stroke diesel]]
| aspiration = [[Roots-type supercharger|Roots blower]]
| displacement = {{convert|6804|cuin|L|abbr=on}} each
| generator = (2) EMC D-4
| tractionmotors = (4) EMC D-7
| cylindercount=(2) 12
| poweroutput={{convert|2000|hp|sigfig=3|abbr=on|lk=in}} total
| maxspeed={{convert|116|mph|kph|0|abbr=on|lk=in}}
| tractiveeffort=''Starting:'' {{Convert|56500|lbf|kgf|0|abbr=on|lk=in}} @25% <br> ''Continuous:'' {{Convert|31000|lbf|kgf|0|abbr=on|lk=in}} @{{convert|11|mph|kph|0|abbr=on|lk=in}}
| preservedunits=[[Atlantic Coast Line 501]] preserved at the [[North Carolina Transportation Museum]]
| disposition = One preserved, remainder scrapped
}}

The '''EMC E3''' is a {{convert|2,000|hp}}, [[AAR wheel arrangement#A1A-A1A|A1A-A1A]] [[Diesel electric locomotive|diesel-electric passenger locomotive]] that was manufactured by [[Electro-Motive Diesel|Electro-Motive Corporation]] of [[La Grange, Illinois]] as part of the [[EMD E-unit|E Series of EMC/EMD diesel passenger locomotives]]. The EMC demonstrator #822 was released from La Grange for test on September 12, 1938. The [[A unit|cab]] version, or E3A, was manufactured from September 1938 to June 1940, and 17 were produced. The [[B unit|booster]] version, or E3B, was manufactured in March 1939 and September 1939, and 2 were produced. The {{convert|2,000|hp|abbr=on}} was achieved by putting two {{convert|1,000|hp}}, 12-cylinder, model 567 engines in the engine compartment. Each engine drove its own [[electrical generator]] to power the [[traction motor]]s. The E3 was the fourth model in a long line of passenger diesels of similar design known as [[EMD E-units]].

Compared with passenger locomotives made later by EMD, the noses of the E3, [[EMC E4|E4]], [[EMD E5|E5]], and [[EMD E6|E6]] cab units had pronounced slants when viewed from the side. Therefore, these four models have been nicknamed "slant nose" units. Later E models had the more vertical "bulldog nose" of the F series.  E3 demonstrator 822 was built with a nose identical to earlier [[EMD EA|EA]] and [[EMD E1|E1A]] units, but later locomotives in the series featured an elevated headlamp mounted in a nacelle, distinct from the flush profile mounting of the earlier units.  822 was modified in a similar fashion prior to delivery to the [[Kansas City Southern Railway]].