EMD DDM45

The EMD DDM45 is a narrow gauge diesel-electric locomotive built by EMD. The DD in the name means that it has eight axles in two trucks, giving it a D-D wheel arrangement, while the M stands for the meter gauge track it was to operate on, and the 45 represents the EMD's SD45 that the engine was derived from. They were built for service on the Estrada de Ferro Vitória a Minas (EFVM) in Brazil. In the early 1970s, the EFVM needed not only to expand its locomotive roster, but to use the most powerful single-engined locomotives available, and the SD45 represented the highest-rated model that EMD had to offer at the time.

EMD DDM45
EFVM 861, an EMD DDM45.
Type and origin
Power typeDiesel
BuilderGeneral Motors Electro-Motive Division
ModelDDM45
Build date1970 - 1976
Total produced83
Specifications
Configuration:
​
 • AARD-D
 • UICDo'Do'
Gauge1,000 mm (3 ft 3 3⁄8 in) metre gauge
Wheel diameter1,016 mm (40.0 in)
Minimum curve83 m (272 ft)
Length22.352 m (73.33 ft)
Width3.127 m (10.26 ft)
Height4.754 m (15.60 ft)
Axle load20.25 t (19.93 long tons; 22.32 short tons)
Loco weight162 t (159 long tons; 179 short tons)
Fuel capacity10,333 L (2,730 US gal; 2,273 imp gal)
Prime moverEMD 20-645-E3
Engine typeV20 Two-stroke diesel
AlternatorEMD AR-10B3
Traction motors8x EMD D29
Cylinders20
Transmissiondiesel electric
Performance figures
Maximum speed84.9 km/h (52.8 mph)
Power output3,600 hp (2,700 kW)
Tractive effort39,657 kgf (388.90 kN)
39,657 kgf (87,430 lbf)
Factor of adh.25%
Career
OperatorsE. F. Vitória a Minas
LocaleBrazil

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:

Order numberBuild dateSerial numbersCountryRailroadNumbersQuantity
711197-711208February 1970 - March 197034671-34682BrazilE. F. Vitória a Minas801-81212
711441-711448March 1970 - April 197036303-36310BrazilE. F. Vitória a Minas813-8208
711871-711880March 197137278-37287BrazilE. F. Vitória a Minas821-83010
712613-712621March 1973 - April 1973712613-712621BrazilE. F. Vitória a Minas831-8399
713096-713119January 1974 - April 1974713096-713119BrazilE. F. Vitória a Minas840-86324
713726-713735October 1975 - December 1975713726-713735BrazilE. F. Vitória a Minas864-87310
748027-1 to -10January 1976 - March 1976748027-1 to 748027-10BrazilE. F. Vitória a Minas874-88310

See also

Media related to EMD DDM45 locomotives at Wikimedia Commons


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.