The EMD SD89MAC was a C-C

diesel-electric locomotive 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 whee ...

produced by General Motors Electro-Motive Division. Along with the

SD80MAC The EMD SD80MAC was a C-C diesel-electric locomotive. It was powered by a 20-cylinder version of EMD's 710G prime mover, and was the second diesel locomotive by GM-EMD to use a V20 engine, since EMD's SD45 series. It introduced a wide radiato ...

and

SD90MAC The EMD SD90MAC is a model of C-C diesel-electric locomotive produced by General Motors Electro-Motive Division (EMD). It is, with the SD80MAC, one of the largest single-engined locomotives produced by EMD and among the most powerful diesel ...

, 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 vehicle, electric or hydrogen vehicles, or electric multiple unit trains. Traction (engineering), Traction motors are used in electrically powe ...

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 ca ...

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 a less-powerful version of the

, and eventual successor to the SD70 series. One demonstrator was built, but generated no orders.Data sheet of EMD SD89MAC
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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

See also

References

External links