The EMD SD89MAC was a
C-C diesel-electric locomotive
A diesel locomotive is a type of railway locomotive in which the prime mover 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 whee ...
produced by
General Motors Electro-Motive Division. Along with the
SD80MAC and
SD90MAC, the SD89MAC was one of the largest single-engine locomotives produced by EMD. The SD89MAC featured
radial steering trucks and an isolated
cab which was mounted on shock absorbers to reduce vibration. The SD89MAC used AC
traction motor
A traction motor is an electric motor used for propulsion of a vehicle, such as locomotives, electric or hydrogen vehicles, elevators or electric multiple unit.
Traction motors are used in electrically powered rail vehicles ( electric multipl ...
technology. Like the SD90MAC, it was a
hood unit
A hood unit, in North American railroad terminology, is a body style for diesel and electric locomotives where the body is less than full-width for most of its length and walkways are on the outside. In contrast, a cab unit has a full-width ...
fitted with a safety cab and has an enlarged radiator section, nearly the entire width of the locomotive, which makes it easy to spot. The frame of GM 92, the only SD89MAC ever built, has since been retrofitted with a different engine for Tier 4 compliance tests conducted by EMD.
The SD89MAC was intended to be less-powerful version of the
SD90MAC, and eventual successor to the
SD70 series. One demonstrator was built, but generated no orders.
Data sheet of EMD SD89MAC
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See also
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References
External links
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Picture of EMD 92 in its new Tier IV Body
{{EMD SDs
C-C locomotives
SD89MAC
Experimental locomotives
Diesel-electric locomotives of the United States
Individual locomotives of the United States
Standard gauge locomotives of the United States