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A diesel locomotive is a type of railway locomotive in which the power source is a diesel engine. Several types of diesel locomotives have been developed, differing mainly in the means by which mechanical power is conveyed to the driving wheels. The most common are diesel–electric locomotives and diesel–hydraulic.
A Norfolk Southern EMD GP38-2 operating long hood forward through Ridgewood, New Jersey. The long hood of a hood unit-style diesel locomotive is, as the name implies, the longer of the two hoods (narrower sections of the locomotive body in front and behind of the cab) on a locomotive, particularly American-type freight locomotives.
Dual power electro-diesel locomotive Co'Co' 114 tonnes (126 short tons) - 126 tonnes (139 short tons) 500 kilonewtons (112,500 lbf) 7,000 kilowatts (9,387.15 hp) Stadler Euro 9000 European Loc Pool 2019 302– Stadler Rail: 2020– Dual power electro-diesel locomotive Co'Co' 123 tonnes (136 short tons) 500 kilonewtons (112,404 lbf)
The AC6000CW is a 6,000-horsepower (4,500 kW) diesel electric locomotive built between 1995 and 2001 by GE Transportation. It is among the world's most powerful single-engined diesel locomotives. The locomotive was designed for extremely high horsepower needs, such as pulling heavy coal and ore trains.
Initially, diesel locomotives were less powerful than the typical steam locomotives. Between the late 1930s and the late 1950s the power available with diesel locomotive engines roughly doubled, although the most powerful steam locomotives ever built still exceeded the power of the most powerful diesel locomotives from the late twentieth century.
The ALCO S-2 and S-4 are 1,000-horsepower (746 kW) diesel electric switcher locomotives produced by ALCO and Canadian licensee Montreal Locomotive Works (MLW). [1]Powered by turbocharged, 6-cylinder ALCO 539 diesel engines, the two locomotives differed mainly in their trucks: the S-2 had ALCO "Blunt" trucks; the S-4, AAR type A switcher trucks.
The EMD DDA40X is a 6,600 hp (4,943 kW) D-D locomotive, built by EMD from 1969 to 1971 exclusively for the Union Pacific Railroad. [1] It is the most powerful diesel–electric locomotive model ever built on a single frame, having two 16-645E3A diesel prime movers. [2]
In addition, the locomotive, while in diesel mode, is capable of routing power generated by the electric brake to HEP and locomotive auxiliary power requirements in addition to the dynamic brake resistor. [55] The locomotives are within Amtrak's A-05-1355 structure gauge and meet CFR and AAR crashworthiness standards. [43]