The EMD GP30 is a 2,250 hp (1,680 kW) four-axle road switcher diesel-electric locomotive built by General Motors Electro-Motive Division of La Grange, Illinois between July 1961 and November 1963. A total of 948 units were built for railroads in the United States and Canada, including 40 cabless B units for the Union Pacific Railroad.
The E8 was a 2,250-horsepower (1,678 kW), A1A-A1A passenger-train locomotive built by General Motors' Electro-Motive Division (EMD) of La Grange, Illinois. A total of 450 cab versions, or E8As, were built from August 1949 to January 1954, 447 for the U.S. and 3 for Canada. And 46 E8Bs were built from December 1949 to January 1954, all for the U.S. The 2,250 hp came from two 12 cylinder model 567B engines, each driving a generator to power the two traction motors on one truck. The E8 was the ninth model in the line of passenger diesels of similar design known as EMD E-units. Starting in September 1953, a total of 21 E8As were built which used either the 567BC or 567C engines.
The DDA40X is a 6,600 horsepower D-D experimental roadswitcher diesel-electric built by the General Motors EMD division of La Grange, Illinois for the Union Pacific Railroad. Nicknamed "Centennials" because they were built around the 100th anniversary of the completion of the First Transcontinental Railroad, and "Big Jack", the DDA40X uses two diesel engine prime movers, each rated at 3,300 horsepower.
A B unit, in railroad terminology, is a locomotive unit which does not have a driving cab or crew compartment, and must therefore be controlled from another, coupled locomotive with a driving cab. The terms booster unit and cabless are also used. The concept is largely confined to North America. Elsewhere, locomotives without driving cabs are rare.
The EMD SD70 is a series of diesel-electric locomotives produced by Electro-Motive Diesel in response to the GE Dash 9-44CW. Production commenced in late 1992 and since then over 5,700 units have been produced; most of these are the SD70M and SD70MAC models. All locomotives of this series are road switchers with C-C trucks, while the SD70ACe-P4 has a B1-1B wheel configuration.
The EMD SD90MAC is a 6,000 hp (4,470 kW) C-C roadswitcher diesel-electriclocomotive produced by General Motors Electro-Motive Division. It is, with the SD80MAC, one of the largest single-engined locomotives produced by that company, surpassed only by the dual-engined DDA40X.
The EMD SD40-2 is a 3,000-horsepower (2,200 kW) C-C road switcher diesel-electric locomotive built by EMD from 1972 to 1989.
The EMD SD50 is a 3,500-horsepower (2,610 kW) road switcher diesel-electric locomotive built by General Motors Electro-Motive Division. It was introduced in May 1981 as part of EMD's "50 Series", but prototype SD50S locomotives were built from 1980; production ceased in January 1986. The SD50 was in many respects a transitional model between EMD's Dash 2 series which was produced throughout the 1970s and the microprocessor-equipped SD60 and SD70 locomotives.
The EMD SD60 is a 3,800 horsepower (2,800 kW), 6-axle road switcher diesel-electric locomotive built by General Motors Electro-Motive Division. Intended for heavy-duty drag freight or medium-speed freight service. It was introduced in 1984, and production ran until 1995.
The EMD GP7 is a four-axle (B-B) road switcher diesel-electric locomotive built by General Motors Electro-Motive Division and General Motors Diesel between October 1949 and May 1954. Power was provided by an EMD 567B 16-cylinder engine which generated 1,500 horsepower (1,119 kW). 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. 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.
An EMD GP9 is a four-axle road switcher diesel-electric locomotive built by General Motors' Electro-Motive Division in the United States, and General Motors Diesel in Canada between January, 1954, and August, 1963. US production ended in December, 1959, while an additional thirteen units were built in Canada, including the last two in August, 1963. Power was provided by an EMD 567C sixteen-cylinder engine which generated 1,750 horsepower (1.30 MW). This locomotive type was offered both with and without control cabs; locomotives built without control cabs were called GP9B locomotives. All GP9B locomotives were built in the United States between February, 1954, and December, 1959.
An SD9 is a 6-axle road switcher diesel locomotive built by General Motors Electro-Motive Division between January 1954 and June 1959. An EMD 567C 16-cylinder engine generated 1,750 horsepower (1.30 MW). This model is, externally, similar to its predecessor, the SD7, but this model, internally, features the improved and much more maintainable 567C engine. The principal spotting feature are the classification lights on the ends of the locomotive, above the number board. The SD9's classification lights are on a small pod, canted outward. The last phase of construction had a carbody similar to the SD18 and SD24, and used two 48-inch (1,219 mm) cooling fans instead of four 36-inch (914 mm) cooling fans.
The EMD SD40 is a 6-axle road switcher diesel-electric locomotive built by General Motors Electro-Motive Division between January 1966 and August 1972.
The SD45 is a six-axle road switcher diesel-electric locomotive built by General Motors Electro-Motive Division between 1965–1971. It had an EMD 645E3 twenty-cylinder engine generating 3,600 hp (2,680 kW) on the same frame as the EMD SD38, EMD SD39, EMD SD40, and EMD SDP40. As of 2017, most SD45s have been retired, scrapped, or rebuilt to SD40-2 standards.
The SD20-2 was a type of road switcher diesel-electric locomotive created in 1979/1980 by the Baltimore and Ohio Railroad by rebuilding EMD SD35 locomotives. Five of the B&O's SD35 fleet were rebuilt at their Cumberland Yard by fitting a non-turbocharged EMD 645 engine and upgraded electrical systems. They were placed in service at the B&O Queensgate Yard in Cincinnati, Ohio attached to slugs, engineless units with traction motors that draw their power from the "mother" unit.
The EMD GP10 is a road switcher diesel-electric locomotive that is the result of rebuilding a GP7, GP9 or GP18.
A GP8 is a four-axle road switcher diesel locomotive rebuilt by Illinois Central's Paducah shops using a General Motors Electro-Motive Division (EMD) GP7, GMD GP7 or GP9 as a start. It is similar to the GP10 and GP11.
The EMD GP11 is a four-axle road switcher diesel locomotive rebuilt by the Illinois Central Railroad's Paducah shops. It is very similar in appearance to the GP8 and GP10.
The EMD SD70ACU is a 6-axle 4,300–4,500 hp (3,207–3,356 kW) roadswitcher diesel-electric locomotive originally built by General Motors Electro-Motive Division, and rebuilt by Norfolk Southern at its shops in Altoona, Pennsylvania. The first locomotive entered the rebuilding process in September 2015, which was the 7299. 60 of these locomotives are now in service as of March 2017. They are currently being rebuilt from the SD90MACs.
