EMD DDM45

EFVM 861, an EMD DDM45.

Type and origin
Power type	Diesel
Builder	General Motors Electro-Motive Division
Model	DDM45
Build date	1970 - 1976
Total produced	83

Specifications
AAR wheel arr.	D-D
UIC class	Do'Do'
Gauge	1,000 mm (3 ft 3 ³⁄₈ in) metre gauge
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 (19.93 long tons; 22.32 short tons)
Loco weight	162 t (159 long tons; 179 short tons)
Fuel capacity	10,333 L (2,730 US gal; 2,273 imp gal)
Prime mover	EMD 20-645-E3
Engine type	V20 Two-stroke diesel
Alternator	EMD AR-10B3
Traction motors	8x EMD D29
Cylinders	20
Transmission	diesel electric

Performance figures
Maximum speed	84.9 km/h (52.8 mph)
Power output	3,600 hp (2,700 kW)
Tractive effort	39,657 kgf (388.90 kN) 39,657 kgf (87,430 lbf)
Factor of adh.	25%

Career
Operators	E. F. Vitória a Minas
Locale	Brazil

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.

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 number	Build date	Serial numbers	Country	Railroad	Numbers	Quantity
711197-711208	February 1970 - March 1970	34671-34682	Brazil	E. F. Vitória a Minas	801-812	12
711441-711448	March 1970 - April 1970	36303-36310	Brazil	E. F. Vitória a Minas	813-820	8
711871-711880	March 1971	37278-37287	Brazil	E. F. Vitória a Minas	821-830	10
712613-712621	March 1973 - April 1973	712613-712621	Brazil	E. F. Vitória a Minas	831-839	9
713096-713119	January 1974 - April 1974	713096-713119	Brazil	E. F. Vitória a Minas	840-863	24
713726-713735	October 1975 - December 1975	713726-713735	Brazil	E. F. Vitória a Minas	864-873	10
748027-1 to -10	January 1976 - March 1976	748027-1 to 748027-10	Brazil	E. F. Vitória a Minas	874-883	10

External links

Media related to EMD DDM45 locomotives at Wikimedia Commons

Limited production, export and EMD engined locomotives by Electro-Motive Diesel

Electrics

Industrial, military, export
and narrow gauge

Streamliners

EMD-engined and
license-built units

British Rail	Class 57 Class 67

Córas Iompair Éireann	Class 001 Class 071 Class 121 Class 141 Class 181

CFL (Luxembourg)	Class 1600

Danish State Railways	Class ME Class MX Class MY Class MZ

Iarnród Éireann	Class 201

Indian Railways	Class WDM-4

Israel Railways	JT 42BW JT 42CW

Northern Ireland Railways	Class 111

Norwegian State Railways	NSB Di 4

NJ Transit	Alstom PL42AC

RENFE (Spain)	Class 310 Class 319 (early versions) Class 319 (later versions) Class 333 Class 334

SNCB (Belgium)	HLD 51 HLD 52 HLD 53 HLD 54 HLD 55 HLD 61 HLD 62 HLD 65

Swedish State Railways	T41 T43 T44

Vossloh	Euro

Experimentals

See also: List of GM-EMD locomotives

6- and 8-axle diesel-electric locomotives built by GM-EMD

Six-axle road power	SD7 SD9 SD18 SD24 SD28 SD30C-ECO SD32ECO SD35 SDP35 SD38 SD38AC SD38-2 SD39 SDL39 SD40 SD40X SD40A SD40-2 SD40-2W SD40T-2 SD40-2S SDP40 SDP40F SD45 SD45X SD45-2 SD45T-2 SDP45 SD50 SD50F SD60 SD60F SD60I SD60M SD70 SD70I SD70M SD70MAC SD70M-2 SD70ACe SD75M SD75I SD80MAC SD89MAC SD90MAC

Eight-axle road power	DD35 DD35A DDA40X DDM45

See also: List of GM-EMD locomotives

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