The MPI MP20B is a

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 ...

designed and built by

MotivePower MotivePower, Inc. (MPI) was an American manufacturer of diesel-electric locomotives. The company traces its history back to being a division of Morrison-Knudsen (MK) since 1972.Boise, Idaho Boise ( ) is the List of capitals in the United States, capital and List of cities in Idaho, most populous city of the U.S. state of Idaho. As of the 2020 United States census, 2020 census, there were 235,685 people residing in the city. Loca ...

Specifications

The MP20 has a MTU-

Detroit Diesel Detroit Diesel Corporation (DDC) is an American diesel engine manufacturer headquartered in Detroit, Michigan. It is a subsidiary of Daimler Truck North America, which is itself a wholly owned subsidiary of the multinational Daimler Truck AG. ...

12V4000 engine. It weighs approximately 277,000 lb and is 59 ft 2 in long. It has a maximum speed of . It also includes a B-B wheel arrangement and an optional

dynamic brake Dynamic braking is the use of an electric traction motor as a generator when slowing a vehicle such as an electric or diesel-electric locomotive. It is termed " rheostatic" if the generated electrical power is dissipated as heat in brake grid re ...

. It includes a continuous tractive effort of and a starting tractive effort of .MPE-X Low Emissions Locomotives

MotivePower MotivePower, Inc. (MPI) was an American manufacturer of diesel-electric locomotives. The company traces its history back to being a division of Morrison-Knudsen (MK) since 1972.Union Pacific The Union Pacific Railroad is a Class I freight-hauling railroad that operates 8,300 locomotives over routes in 23 U.S. states west of Chicago and New Orleans. Union Pacific is the second largest railroad in the United States after BNSF, ...

MP20Bs were powered by a

Caterpillar Caterpillars ( ) are the larval stage of members of the order Lepidoptera (the insect order comprising butterflies and moths). As with most common names, the application of the word is arbitrary, since the larvae of sawflies (suborder ...

3516C.UP receives cool Cats from Boise ''

Trains A train (from Old French , from Latin">-4; we might wonder whether there's a point at which it's appropriate to talk of the beginnings of French, that is, when it wa ... , from Latin , "to pull, to draw") is a series of connected vehicles th ...

'' July 2007 page 24

Owners

References

B-B locomotives Diesel–electric locomotives of the United States EPA Tier 2-compliant locomotives of the United States MPI locomotives Railway locomotives introduced in 2007 Standard-gauge locomotives of the United States {{diesel-loco-stub