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EMD GP7
ITC 1605, at the Illinois Railway Museum
Type and origin
Power type
Diesel-electric
Builder
General Motors Electro-Motive Division (EMD) General Motors Diesel (GMD)
Model
GP7
Build date
October 1949 – May 1954
Total produced
2,729 (plus 5 B units)
Specifications
Configuration:
• AAR
B-B
Gauge
4 ft 8+1⁄2 in (1,435 mm) standard gauge
Wheel diameter
40 in (1.016 m)[1]
Minimum curve
19° (301 ft (91.74 m) radius)
Wheelbase
40 ft (12.19 m)
Length
55 ft 11 in (17.04 m)
Width
10 ft 3 in (3.12 m)
Height
15 ft 0 in (4.57 m)
Loco weight
246,000 lb (112,000 kg)
Fuel capacity
1,600 US gal (6,100 L; 1,300 imp gal)[1]
Lubricant cap.
200 US gal (760 L; 170 imp gal)[1]
Coolant cap.
230 US gal (870 L; 190 imp gal)[1]
Sandbox cap.
18 cu ft (510 dm3)[1]
Prime mover
EMD 16-567B[2]
RPM range
275–800[1]
Engine type
V16 Two-stroke diesel
Aspiration
Roots blower
Displacement
9,072 cu in (148.66 L)
Generator
EMD D-12-B[1]
Traction motors
(4) EMD D-27-B[1]
Cylinders
16
Cylinder size
8+1⁄2 in × 10 in (216 mm × 254 mm)
Loco brake
Independent air; optional: dynamic brakes
Train brakes
Air, schedule 6-BL[3] or 6-BLC.[4] Schedule
24-RL offered as optional.
Erie- MFSE-15a NYC- various P&E- 5612-5623 DRS-4c 5624-5625 DRS-4d P&LE- various NKP- ERS-15 PRR- ERS15 WAB- D15
Disposition
Some retired, some rebuilt into GP8s or GP10s, many in service
Aberdeen and Rockfish Railroad 205 at the company’s yard in Aberdeen, North CarolinaBBRR 1, a GP7, with the ODC special, Dillwyn, Virginia.Chesapeake and Albemarle 2158 (an ex-ATSF GP7U) in Chesapeake, VA.OmniTrax 4433 (a GP7 rebuilt by the Chicago and North Western Railway) spotted on CSX in Augusta, Georgia.
The EMD GP7 is a four-axle (B-B) diesel-electric locomotive built by General Motors Electro-Motive Division and General Motors Diesel between October 1949 and May 1954.[2]
The GP7 was the first EMD road locomotive to use a hood unit design instead of a car-body design. This proved to be more efficient than the car body design as the hood unit cost less to build, was cheaper and easier to maintain, and had much better front and rear visibility for switching.[5] Power was provided by an EMD 567B 16-cylinder engine which generated 1,500 horsepower (1,119 kW).[6] The GP7 was offered both with and without control cabs, and those built without control cabs were called a GP7B. Five GP7B's were built between March and April 1953.[2]
Of the 2,734 GP7's built, 2,620 were for American railroads (including 5 GP7B units built for the Atchison, Topeka and Santa Fe Railway), 112 were built for Canadian railroads, and 2 were built for Mexican railroads.
This was the first model in EMD's GP (General Purpose) series of locomotives. Concurrently, EMD offered a six-axle (C-C) SD (Special Duty) locomotive, the SD7.[5] The GP7 was replaced by the GP9 model in GM-EMD's GP sequence.
^ abcdefghSchrenk & Frey (1988) p.291
^ abcPinkepank, Jerry A. (1973) pp. 53
^IC Railroad 1969 diesel diagrams, pp.46–47
^Cite error: The named reference NPdia557 was invoked but never defined (see the help page).
^ abSchafer, Mike (1998). Vintage diesel locomotives. Osceola, WI: Motorbooks International. p. 37. ISBN 0-7603-0507-2. OCLC 38738930.
The EMDGP7 is a four-axle (B-B) diesel-electric locomotive built by General Motors Electro-Motive Division and General Motors Diesel between October...
1970s and 1980s. The SD7 was conceived as a modification of the existing EMDGP7 with two additional powered axles, one for each truck. Providing two more...
However, lessons learned from the BL2 were incorporated into EMD's next design, the GP7. EMD's diesel program was well underway by the late 1940s thanks...
EMD GP9 is a four-axle diesel-electric locomotive built by General Motors' Electro-Motive Division between 1954 and 1959. The GP9 succeeded the GP7 as...
GP11 rebuilding program in 1978. All units were rebuilt from recycled EMDGP7, GP9 or GP18 parts. Spotting features are an angled cab, exterior paper...
The EMD GP40 is a 4-axle diesel-electric locomotive built by General Motors' Electro-Motive Division between November 1965 and December 1971. It has an...
contention. In later years, with the advent of the "road switchers" such as the EMDGP7, F-units were primarily used in "through freight" and "unit train" service...
The EMD GP10 is a diesel-electric locomotive that is the result of rebuilding a GP7, GP9 or GP18. The Illinois Central Railroad had three separate rebuild...
(2005). EMD F-Unit Locomotives. North Branch, Minnesota: Specialty Press. ISBN 978-1-58007-192-5. Solomon, Brian (2006). EMD Early Road Switchers: GP7-GP20...
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The EMD GP18 is a 4-axle diesel-electric locomotive built by General Motors, Electro-Motive Division between December 1959 and November 1963. Power was...
switcher locomotive designs, as offered by the competition in the form of the EMDGP7 or the Alco RS-3 and even the Baldwin DRS-4-4-1500. Robert Aldag Jr., who...
with the Nebraska Zephyr and only surviving EMD E5. The 1993 movie Groundhog Day featured the museum's EMD SD24 diesel locomotive. The museum's grounds...
six-axle variant of the four-axled GP10, which the GP10s were rebuilds of EMDGP7 and GP9 units. The rebuild program involved replacing the original 16-cylinder...
design project to replace the 244. 1949 also saw the introduction of the EMDGP7 road-switcher, a direct challenge in ALCo's bread-and-butter market. In...
EMDGP7 locomotives leased from the B&M in 1978–1982 24 RDCs acquired or leased from MARC, SEPTA, and New Jersey Transit between 1983 and 1987 11 EMD...
was the second model of EMD's SD (special duty) line of locomotives, following the SD7. Just as the SD7 was a lengthened GP7 with two additional axles...
Global Information
