An EMD GP50 is a 4-axle road switcher diesel-electric locomotive built by General Motors Electro-Motive Division (EMD). It is powered by a 16-cylinder EMD 645F3B diesel engine, which can produce between 3,500 and 3,600 hp (2,610 and 2,685 kW). 278 examples of this locomotive were built by EMD between 1980 and 1985. BN 3110-3162 were all delivered with five cab seats, the final five of these having the cab lengthened 23 in (584 mm) vs. the standard EMD cab. The GP50 retains the same overall length of 59 feet 2 inches (18.03 meters) as the EMD GP38, EMD GP38-2, EMD GP39, EMD GP39-2, EMD GP40 and EMD GP40-2.
In 2015–2016 the Norfolk Southern Railway rebuilt 28 GP50s into the low-emission GP33ECO. And in early 2016, Norfolk Southern rebuilt one GP50 into their first GP59ECO. These units, most of which utilized GP59 cores, have similar specifications as the earlier GP33ECO program but have been built without public funding contributing to their construction.
|Atchison, Topeka and Santa Fe Railway||45||3810-3854||All now in service with BNSF Railway|
|Burlington Northern Railroad||63||3100-3162||3100-3109 ordered by St. Louis – San Francisco Railway, but delivered to BN. 3100 only one that received Frisco colors, though with BN number. Most now in service with BNSF Railway|
|Chicago and North Western Railway||50||5050-5099||To Union Pacific Railroad; since retired.|
|Missouri Pacific Railroad||30||3500-3529|
|Southern Railway||90||7003-7092||High hood units; passed to successor NS. All retired or rebuilt to different configurations, 28 being converted to GP33ECO.|
|Toledo Peoria and Western Railroad||4||5008, 5009, 5010, 5015||All units are ex-BN. 5010 is ex-SLSF.|
|Mississippi Export Railroad||1||68||68 is former CNW.|
|Massachusetts Coastal Railroad||1||2010||Ex-CNW 5098|
|Webb Asset Management (WAMX)||10||5001-5002, 5004, 5005, 5007-5008, 5010-5013||All ex-UP nee CNW.|
- "NS unveils first publicly funded GP33ECO locomotives". Trains. January 6, 2015. Retrieved 12 January 2015. (subscription required)
|Wikimedia Commons has media related to EMD GP50 locomotives.|
- Sarberenyi, Robert. EMD GP39X, GP49, and GP50 Original Owners