EMD DDM45
| EMD DDM45 |
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| EFVM 861, an EMD DDM45. |
| Power type |
Diesel |
| Builder |
General Motors Electro-Motive Division |
| Model |
DDM45 |
| Build date |
1970 - 1976 |
| Total produced |
83 |
| AAR wheel arr. |
D-D |
| UIC classification |
Do'Do' |
| Gauge |
1,000 mm (3 ft 3 3⁄8 in) |
| Wheel diameter |
1,016 mm (40.0 in) |
| Minimum curve |
83 m (272 ft) |
| Length |
22.352 m (73.33 ft) |
| Width |
3.127 m (10.26 ft) |
| Height |
4.754 m (15.60 ft) |
| Axle load |
20.25 t (44,600 lb) |
| Locomotive weight |
162 t (360,000 lb) |
| Fuel capacity |
10,333 l (2,730 US gal) |
| Prime mover |
EMD 20-645-E3 |
| Engine type |
Two-stroke diesel |
| Alternator |
EMD AR-10B3 |
| Traction motors |
8x EMD D29 |
| Cylinders |
20 |
| Transmission |
electric |
| Top speed |
84.9 km/h (52.8 mph) |
| Power output |
3,600 hp (2,700 kW) |
| Tractive effort |
39,657 kgf (388.90 kN) |
Factor of
adhesion |
25% |
| Locale |
South America |
The EMD DDM45 is a narrow gauge diesel-electric locomotive built by EMD. It has eight axles in two trucks, giving it a D-D wheel arrangement. The name means a D-D locomotive, M for meter gauge, 45 series. They were built for service in Brazil, South America. The Estrada de Ferro Vitória a Minas (EFVM) bought several in the early 1970s in order to expand their locomotive roster. The EFVM needed the most powerful single-engined locomotive available, and the SD45 represented the highest-rated model that EMD had to offer at the time.
However, a big locomotive such as an SD45 with its three-axle trucks wasn't readily adaptable to the EFVM's narrow gauge trackage. The smaller traction motors of the meter gauge locomotive were unable to handle the full current capacity from the 3,600 hp (2,700 kW) prime mover. EMD proposed using a meter gauge version of the Flexicoil-D four-axle trucks, similar to those found under the domestic DD35, DD35A and DDA40X locomotive models. The two additional traction motors of this design allowed full power to be used.
Roster of DDM45s:
Limited Production and Export Locomotives built by GM-EMD |
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| Electrics |
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Industrial, military, export
and narrow gauge |
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| Streamliners |
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| Experimentals |
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| Six-axle road power |
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| Eight-axle road power |
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