EMD GP38-2
| EMD GP38-2 series | |
|---|---|
 EMD GP38-2 of UP # 358
|
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| Manufacturer: | Electro-Motive Division |
| Year of construction (s): | 1972-1986 |
| Axis formula : | Bo'Bo ' |
| Gauge : | 1435 mm ( standard gauge ) |
| Length over coupling: | 18,034 mm |
| Service mass: | 120.2 t |
| Top speed: | 112 km / h |
| Hourly output : | 2,000hp |
| Starting tractive effort: | 271kN |
| Motor type: | EMD 16-645E |
| Power transmission: | electric |
| Number of traction motors: | 4th |
The EMD GP38-2 is a series of 4-axle diesel-electric locomotives from the US locomotive manufacturer General Motors Electro-Motive Division (EMD).
A total of 2,219 and 2,222 machines of this series were manufactured.
development
The GP38-2 is a further development of the EMD GP38 series . For the first time, a modular structure of the components prevailed at EMD. EMD offered the series, soon to be called Dash 2 (English for dash 2), similar to its predecessor in three performance classes. In addition to the EMD GP38-2 (1,500 kW), a medium-power ( EMD GP40-2 , 2,250 kW) sister series was developed. In 1980 an even more powerful series ( EMD GP50 , 2,700 kW) was added.
construction
The locomotive types GP38 , GP38-2, GP39 , GP39-2 , GP40 , GP40-2 and GP50 were based on a uniform framework . This resulted in an identical length for all series. Newly developed bogies have been installed in all Dash 2 series , which, according to the manufacturer, deliver higher tractive power compared to their predecessors. In addition, the electronic components were built up modularly. This resulted in easier maintenance of the machines.
The GP 38-2 and GP 40-2 use the same motor type EMD 16-645 . The type designation EMD 16-645 means that the diesel engine had 16 cylinders with a displacement per cylinder of 645 cubic inches. GP38-2 are charged with Roots compressors , with the GP40-2 the engine is charged with exhaust gas turbochargers . Where the higher performance of the GP40-2 was not necessary, the GP38-2 was often preferred because the turbocharger meant higher maintenance requirements. The engines work on the two-stroke diesel principle . They are so-called "slow runners" with speeds between 275 / min (idle) and 875 / min (full load).
The most striking distinguishing feature of the GP 38-2 compared to the GP 40-2 is the number of roof fans at the end of the vehicle . The GP38-2 has two exhaust systems, the GP40-2 has only one exhaust system. While the GP38 only needs 2 fans, the GP40 has three fans.
All machines ran on two two-axle Bloomberg bogies.
Special series
In 1973 and 1974, 51 class GP 38-2W locomotives with an enlarged cab were built for the Canadian National Railway . 20 more machines were a passenger train - locomotives to Mexico delivered. In these machines, the upper edge of the front end was pulled up to the roof of the driver's cab to make room for the train heating devices . This made the machines similar to earlier models in the GP series .
photos
Union Pacific Railroad # 588, provisionally renumbered after taking over the Southern Pacific Railroad .
NS # 5029, one of 257 high-hood GP38-2 built for the Southern Railway (# 5000-5256).
literature
- Jerry A. Pinkepank: The Second Diesel Spotters Guide . Kalmbach Publishing Co., Milwaukee, 4th edition 1980. ISBN 0-89024-026-4
Web links
Individual evidence
- ^ Louis A. Marre and Paul K. Withers: The Contemporary Diesel Spotter's Guide . Year 2008 edition. Withers Publishing, Halifax, PA 2008, ISBN 1-881411-53-2 , pp. 19 .
- ^ Greg McDonnell: Field guide to modern diesel locomotives . Kalmbach Publishing Co., Waukesha, WI 2002, ISBN 0-89024-607-6 , pp. 108 .