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EMD GP20
ATSF 3055 in San Bernardino, California
Type and origin
Power type
Diesel-electric
Builder
General Motors Electro-Motive Division (EMD)
Model
GP20
Build date
November 1959 to April 1962
Total produced
260
Specifications
Configuration:
• AAR
B-B
• UIC
Bo′Bo′
Gauge
4 ft 8+1⁄2 in (1,435 mm)
Length
56 ft 2 in (17.12 m)
Width
10 ft 3 in (3.12 m)
Height
14 ft 6 in (4.42 m)
Loco weight
240,000 lb (108,862 kg)
Fuel capacity
2,350 US gal (8,896 L; 1,957 imp gal)
Lubricant cap.
227 US gal (859 L; 189 imp gal)
Coolant cap.
220 US gal (833 L; 183 imp gal)
Sandbox cap.
18 cu ft (0.51 m3)
Prime mover
EMD 16-567D2
Engine type
Two-stroke V16 diesel
Aspiration
Turbocharged
Displacement
9,072 cu in (148.66 L)
Generator
EMD D-22
Traction motors
EMD D47 (4) or D57 (4)
Cylinders
16
Cylinder size
8+1⁄2 in × 10 in (216 mm × 254 mm)
Transmission
Diesel electric
Loco brake
Schedule 24RL or 26L Straight air, optional: dynamic
An EMD GP20 is a 4-axle diesel-electric locomotive built by General Motors' Electro-Motive Division between November 1959 and April 1962. Power was provided by an EMD 16-567D2 16-cylinder turbocharged engine which generated 2,000 horsepower (1,500 kW). EMD was initially hesitant to turbocharge their 567-series diesel engine, but was spurred on to do so following successful tests made by Union Pacific in the form of UP's experimental Omaha GP20 units. 260 examples of EMD's production locomotive model (with the EMD turbocharger) were built for American railroads.
The GP20 was the second EMD production locomotive to be built with an EMD turbocharged diesel engine, sixteen months after the six-axle (C-C) model SD24. Power output of the turbocharged SD24 was 33 percent higher than the 1,800 hp (1,340 kW) of the concurrent Roots blower-equipped SD18s with the same engine displacement, 400 hp (298 kW) per axle, but the power output of the turbocharged GP20 was only 11 percent higher than the 1,800 hp (1,340 kW) of the concurrent Roots blower-equipped GP18s with the same engine displacement 500 hp (373 kW) per axle, due to the limitations of the traction motors then available. Nevertheless, the turbocharged GP20 provided full rated power at all altitudes, which the Roots-blown GP18 could not provide.
An EMDGP20 is a 4-axle diesel-electric locomotive built by General Motors' Electro-Motive Division between November 1959 and April 1962. Power was provided...
new competitor GE's U25B. The U25B offered 2,500 hp (1,860 kW) while EMD'sGP20 and its 567D2 prime mover was only rated at 2,000 hp (1,490 kW). The U25B...
EMD F-Unit Locomotives. North Branch, Minnesota: Specialty Press. ISBN 978-1-58007-192-5. Solomon, Brian (2006). EMD Early Road Switchers: GP7-GP20 Locomotives...
Illinois Railway Museum. Retrieved 2008-06-27. Alberston, Bob. (1996). "EMD SD7-SP 1518, A precursor to all engines on rails today". Railfan & Railroad...
The first SD24 was built sixteen months before the four-axle (B-B) model GP20. Power output of the SD24 was 33 percent higher than the 1,800 hp (1,340 kW)...
The EMD 567 is a line of large medium-speed diesel engines built by General Motors' Electro-Motive Division. This engine, which succeeded Winton's 201A...
owns two EMDGP20 and one EMD GP9. The GP20s retain the paint scheme of their previous owner, the Milwaukee Road. In 2014, the COP purchased an EMD SW1500...
EMD GP9 1954 Great Northern #667 In service 46 EMD GP9E 1957 Southern Pacific #5731 Sold 47 EMD GP7 1952 Reading Company #607 In service 48 EMDGP20 1961...
windshields were replaced with two-piece units similar to those used on the EMDGP20, a move intended to bring standardization of windshield glass to several...
and charcoal. The FSR currently operates with three ex-Santa Fe Railroad EMDGP20 locomotives. The original line, consisting of 47 miles (76 km) to Paris...
GE C44-9W's and one GE Dash 8-40B to replace its aging fleet of EMD SD40-2's and EMD SD40M-2's. The railroad also owned or leased freight cars including...
in the U.S. at the time of its introduction, its contemporaries being the GP20 (2,000 hp) and the RS27 (2,400 hp or 1,800 kW). Though many were produced...
but not entirely unbeknownst to them: several of their F7s and the odd GP20 also had them), and two single-bell Leslie A-200 horns mounted directly behind...
(CCRCL) for a time, numbered 2019. Housed inside the frame of an ex-Santa Fe EMDGP20, the unit remained in Santa Fe's "Kodachrome" scheme until its sale. In...
Sierra Northern Railway A Sierra Northern EMDGP20 in Santa Cruz. Overview Headquarters Woodland, California Reporting mark SERA Dates of operation 2003–present...
GE U23C Cotton Belt 5006 – EMD GP30 Little Rock and Western #102 (ex L&N #1306) - Alco C420 KLIX #2003 (ex SSW #815) EMDGP20 Rescar GE 25-tonner West Tennessee...
Harrigan Lumber after its re-opening in 2010. The railroad operated three EMDGP20 locomotives on a bi-weekly basis. The Alabama Railroad had several bridges...
Hilburn Hart Roy Dimmitt West, TX One EMD SD9043MAC Three EMD GP38s Two EMD F40 mother-mate sets One EMDGP20 Chemicals Cotton Grain Farm Machinery Lumber...
scheme from the failed Santa Fe–Southern Pacific merger; WP 2001, the first GP20 locomotive (an early turbocharged diesel); WP 501, an early switch engine...
completed in September 2011.[needs update] The Commonwealth Railway had two GP20 locomotives numbered 2090 and 2091 which were sold in 2019 to Larry's Truck...
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