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EMD DIESEL LOCOMOTIVES



EMD DDA40X - NEXT PHOTOS


EMD DDA40X

Technical Data And Photos



Type: Eight-axle road switcher diesel-electric locomotive.
Model: EMD DDA40X


EMD DDA40X is the most powerful and the longest single-unit diesel locomotive in the world.


Build date: April 1969 – September 1971
Builder: General Motors Electro-Motive Division (EMD), La Grange, Illinois, USA.
Total produced: 47
Locale: USA
Operator: Union Pacific
Numbers: 6900 – 6946

Delivered :
6900-6924 April – December 1969
6925-6946 June 1970 – September 1971

Disposition (2018):
1 in service
46 withdrawn (13 preserved, 34 scrapped)

Nicknames: "Centennial", "Big Jack"

Track gauge: 1 435 mm (4'8.5") standard gauge


Engines:
Number of engines: 2
Type: Two-stroke 45-degree V16 diesel engines.
Model: EMD 645E3A
Power output: 2 x 2460 kW (3300 hp) = 4920 kW (6600 hp)
RPM - maximum: 800
RPM - minimum: 275
Number of cylinders: 16 + 16 = 32
Displacement: 2 x 169.6 L (10,320 in3) = 339.2 L (20 640 in3)
Displacement per cylinder: 10.6 L (645 in3)
Bore: 230 mm (9 1/16")
Stroke: 250 mm (10")
Aspiration: turbocharged
Valvetrain: Intake ports in each cylinder liner, 4 exhaust valves in each cylinder head.
Oil system: Forced lubrication system, wet sump.
Cooling: water-cooled


Alternators: two D14

Main generators: two GM - AR12

Auxiliary generator: 18 kW - 74 V

Traction motors: GM - D77X

Number of traction motors: 8

Wheel arrangement: D-D

Number of axles: 8

Brakes:
Dynamic braking: yes
Compressor: Gardner-Denver WBO
Air brake: Westinghouse 26L

Suplies (for two engines):
Lubricating oil: 2 310 L (610 US gallons)
Cooling system (water): 2 270 L (600 US gallons)
Fuel tank capacity: 31 300 L (8,280 US gal; 6,890 imp gal) Sand capacity: 53 cu ft


Operating weight: 247 000 kg (545,000 lbs)

Tractive effort - starting: 506.8 kN (113,940 lbf) at 25 %

Tractive effort - continuous: 460 kN (103,000 lbf) at 12 mph

Maximum speed: 130 km/h (80 mph)
Minimum continuous speed: 18 km/h (11 mph)


Dimensions:
Wheel diameter: 1 016 mm (40")
Total length: 30.00 m (98 ft 5 in)
Wheelbase - between truck centers: 19.81 m (65 ft)
Truck wheel base: 6.13 m (20 ft 1 1/2 in)
Overall height: 4.98 m (16 ft 4 in)
Height - cab roof: 4.56 m (14 ft 11 3/8 in)


Safety systems:
Leslie Supertyfon model S5TRRO or S3LR horns, US&S Type 'EL' Cab Signals (No. 6936 equipped with US&S MicroCab ATC & CCS)


Surviving examples (in 2018):

6900 - Kenefick Park, Omaha, Nebraska.

6901 - Ross Park, Pocatello, Idaho.

6911 - Mexico Museum of Technology, Mexico City.

6913 - Museum of the American Railroad, Frisco, Texas.

6915 - Southern California Chapter, Railway and Locomotive Historical Society, Fairplex, Pomona, California.

6916 - Utah State Railroad Museum, Ogden, Utah.

6922 - Cody Park, North Platte, Nebraska.

6925 - Stored at Dakota Southern Railway’s rail yard located in Chamberlain, South Dakota. It is used for parts and fuel storage.

6930 - Illinois Railway Museum, Union, Illinois. Used as a control cab only, engines and motors are currently non-operational.

6936 - Still in service with Union Pacific Heritage Fleet.

6938 - North Little Rock, Arkansas (Sits in front of Jenks Locomotive Facility).

6944 - Museum of Transportation, St. Louis, Missouri, sent to Altoona in July 2014 for cosmetic restoration, which was completed in May 2015 and is now back on display at Museum of Transportation, St. Louis, Missouri in June 2015.

6946 - Western Pacific Railroad Museum, Portola, California. The last DDA40X built. This locomotive is fairly complete and on static display.


World's largest and highest horse power diesel locomotive
The first EMD DDA40X diesel locomotive - Union Pacific No. 6900.
Union Pacific Centennial - World's largest and highest horse power diesel locomotive.
EMD DDA40X - eight-axle diesel locomotive.
Photo of the Union Pacific "Centennial" locomotive, which was built for the anniversary of the Golden Spike. This was the first of its class to be built and delivered in time for that ceremony.
The United States of America.
Taken on: between April and May 1969
Size of the photo: 942 × 738 pixels, 228 kB
Author of the photo: Union Pacific Railroad


EMD DDA40X - eight-axle diesel-eletric locomotive
The EMD DDA40X - eight-axle diesel-eletric locomotive.
Photo of Union Pacific EMD DDA40X locomotive 6900 on its way from Kansas City to Denver for the celebration of the Golden Spike Centennial in 1969.
The United States of America.
Taken on: 6 May 1969
Size of the photo: 975 × 775 pixels, 217 kB
Author of the photo: Union Pacific Railroad


The first EMD DDA40X diesel locomotive - Union Pacific No. 6900
The first EMD DDA40X diesel locomotive - Union Pacific No. 6900.
Kenefick Park in Omaha, Nebraska celebrating the trans-continental railroad and Union Pacific Railroad’s contributions to the area and the development of America.
Taken on: 7 May 2008
Size of the photo: 1600 x 1200 pixels, 431 kB
Author of the photo: civilengtiger
License: (CC BY 2.0)


Tehnical drawing with dimensions of the EMD DDA40X diesel locomotive
Technical drawing with dimensions of the EMD DDA40X diesel locomotive - Union Pacific No. 6900.
Taken on: 7 May 2008
Size of the photo: 1862 x 737 pixels, 952 kB
Author of the photo: civilengtiger
License: (CC BY 2.0)


Tehnical drawing with dimensions and technical specification of the EMD DDA40X diesel locomotive
Technical drawing with dimensions and technical specification of the EMD DDA40X diesel locomotive - Union Pacific No. 6900.
Kenefick Park in Omaha, Nebraska celebrating the trans-continental railroad and Union Pacific Railroad’s contributions to the area and the development of America.
Taken on: 7 May 2008
Size of the photo: 2272 x 1704 pixels, 1.73 MB
Author of the photo: civilengtiger
License: (CC BY 2.0)


American freight train
American freight train.
UP DDA40X 6910, SD40-2 3244, and SD40-2 3566 with an eastbound just before the entrance to the Spring Garden Tunnel on the ex-Western Pacific in California in August 1984.
The United States of America.
Taken on: August 1984
Size of the photo: 1177 × 1816 pixels, 1.94 MB
Author of the photo: Roger Puta


EMD DDA40X diesel locomotive leading a freight train
EMD DDA40X diesel locomotive leading a freight train.
UP DDA40X 6910, SD40-2 3244, and SD40-2 3566 approaching Portola, California, USA. Taken on: August 1984
Size of the photo: 3697 × 2449 pixels, 8.35 MB
Author of the photo: Roger Puta


EMD DDA40X diesel locomotive leading a freight train
EMD DDA40X diesel locomotive leading a freight train.
UP DDA40X 6910, SD40-2 3244, and SD40-2 3566 approaching Portola, California, USA. Taken on: August 1984
Size of the photo: 2000 × 1298 pixels, 2.23 MB
Author of the photo: Roger Puta


EMD DDA40X diesel locomotive leading a freight train
EMD DDA40X diesel locomotive leading a freight train.
UP DDA40X 6910, SD40-2 3244, and SD40-2 3566 approaching Portola, California, USA. Taken on: August 1984
Size of the photo: 2000 × 1244 pixels, 1.75 MB
Author of the photo: Roger Puta


Side view of EMD DDA40X Union Pacific No. 6936 eight-axle diesel locomotive
Side view of EMD DDA40X Union Pacific No. 6936 eight-axle diesel locomotive.
The United States of America.
Taken on: 29 November 2000
Size of the photo: 800 × 260 pixels, 89 kB
Author of the photo: KLWhitehead
License: (CC BY-SA 3.0)


EMD DDA40X - eight-axle locomotive
EMD DDA40X - eight-axle locomotive.
Union Pacific Railroad No. 6915, an EMD DDA40X "Centennial" locomotive, preserved by the Southern California chapter of the Railroad and Locomotive Historical Society at the Los Angeles County Fairplex in Pomona, California, USA.
Taken on: 9 April 2005
Size of the photo: 2304 × 1728 pixels, 684 kB
Author of the photo: Matthew Brown, Morven
License: (CC BY-SA 3.0)


EMD DDA40X - eight-axle locomotive
EMD DDA40X - eight-axle locomotive.
Union Pacific Railroad No. 6915, an EMD DDA40X "Centennial" locomotive, preserved by the Southern California chapter of the Railroad and Locomotive Historical Society at the Los Angeles County Fairplex in Pomona, California, USA.
Taken on: 9 April 2005
Size of the photo: 2304 × 1728 pixels, 648 kB
Author of the photo: Matthew Brown, Morven
License: (CC BY-SA 3.0)


Part of the locomotive, a four-axle truck
A part of the locomotive, a four-axle truck.
Union Pacific Railroad No. 6915, an EMD DDA40X "Centennial" locomotive, preserved by the Southern California chapter of the Railroad and Locomotive Historical Society at the Los Angeles County Fairplex in Pomona, California, USA.
Taken on: 9 April 2005
Size of the photo: 2304 × 1728 pixels, 693 kB
Author of the photo: Matthew Brown, Morven
License: (CC BY-SA 3.0)


EMD DDA40X - The cab of the locomotive
EMD DDA40X - The cab of the locomotive.
Union Pacific Railroad No. 6915, an EMD DDA40X "Centennial" locomotive, preserved by the Southern California chapter of the Railroad and Locomotive Historical Society at the Los Angeles County Fairplex in Pomona, California, USA.
Taken on: 9 April 2005
Size of the photo: 2304 × 1728 pixels, 728 kB
Author of the photo: Matthew Brown, Morven
License: (CC BY-SA 3.0)


Control stand (driver's control console) of the EMD DDA40X locomotive
Control stand (driver's control console) of the EMD DDA40X locomotive.
Union Pacific Railroad No. 6915 locomotive.
Taken on: 9 April 2005
Size of the photo: 2304 × 1728 pixels, 717 kB
Author of the photo: Matthew Brown, Morven
License: (CC BY-SA 3.0)


A view from the cab of the locomotive.
A view from the cab of the locomotive.
Union Pacific Railroad No. 6915, an EMD DDA40X "Centennial" locomotive, preserved by the Southern California chapter of the Railroad and Locomotive Historical Society at the Los Angeles County Fairplex in Pomona, California, USA.
Taken on: 9 April 2005
Size of the photo: 1728 × 2304 pixels, 765 kB
Author of the photo: Matthew Brown, Morven
License: (CC BY-SA 3.0)


EMD DDA40X - eight-axle road switcher diesel-electric locomotive
EMD DDA40X - eight-axle road switcher diesel-electric locomotive.
EMD DDA40X No. 6936 of Union Pacific.
Union Pacific launched this, their most powerful engine, in 1969 and still keeps this one remaining unit in service.
Illinois, the United States of America.
Taken on: 31 August 2013, 16:57
Size of the photo: 4000 × 2667 pixels, 9.77 MB
Camera model: Canon EOS 7D
Author of the photo: H. Michael Miley
License: (CC BY-SA 2.0)


The eight-axle diesel locomotive
The eight-axle diesel locomotive.
EMD DDA40X No. 6936 of Union Pacific.
Union Pacific launched this, their most powerful engine, in 1969 and still keeps this one remaining unit in service.
Illinois, the United States of America.
Taken on: 31 August 2013, 16:57
Size of the photo: 1920 x 1080 pixels, 9.77 MB
Author of the photo: H. Michael Miley
License: (CC BY-SA 2.0)
The image was extracted from the original photo.
The original photo is over the photo.


Front view of EMD DDA40X No. 6936 of Union Pacific
Front view of EMD DDA40X No. 6936 of Union Pacific.
Illinois, the United States of America.
Taken on: 31 August 2013, 16:59
Size of the photo: 2667 × 4000 pixels, 7.97 MB
Camera model: Canon EOS 7D
Author of the photo: H. Michael Miley
License: (CC BY-SA 2.0)


EMD DDA40X - eight-axle road switcher diesel-electric locomotive
EMD DDA40X - eight-axle road switcher diesel-electric locomotive.
EMD DDA40X No. 6936 of Union Pacific.
Union Pacific launched this, their most powerful engine, in 1969 and still keeps this one remaining unit in service.
Illinois, the United States of America.
Taken on: 31 August 2013, 16:59
Size of the photo: 4000 × 2667 pixels, 10.66 MB
Camera model: Canon EOS 7D
Author of the photo: H. Michael Miley
License: (CC BY-SA 2.0)


EMD DDA40X diesel-electric locomotive at night
EMD DDA40X diesel-electric locomotive at night.
During their 60th anniversary, the Illinois Railway Museum (IRM) had a fundraiser that brought in photographers for a chance to shoot some of their more unusual trains.
Illinois, the United States of America.
Taken on: 31 August 2013, 23:57
Size of the photo: 4000 × 2667 pixels, 9.41 MB
Camera model: Canon EOS 7D
Author of the photo: H. Michael Miley
License: (CC BY-SA 2.0)


Two EMD DDA40X diesel locomotives at night
Two EMD DDA40X diesel locomotives at night.
EMD DDA40X No. 6930 and EMD DDA40X No. 6936 of Union Pacific.
During their 60th anniversary, the Illinois Railway Museum (IRM) had a fundraiser that brought in photographers for a chance to shoot some of their more unusual trains.
Illinois, the United States of America.
Taken on: 1 September 2013, 02:13
Size of the photo: 1920 x 1080 pixels, 1.20 MB
Author of the photo: H. Michael Miley
License: (CC BY-SA 2.0)
The image was extracted from the original photo.
The original photo is under the photo.


Three American diesel locomotives at night
Three American diesel locomotives at night.
EMD DDA40X No. 6930, EMD DDA40X No. 6936 and a No. 18 of Union Pacific.
During their 60th anniversary, the Illinois Railway Museum (IRM) had a fundraiser that brought in photographers for a chance to shoot some of their more unusual trains.
Illinois, the United States of America.
Taken on: 1 September 2013, 02:13
Size of the photo: 1920 x 1080 pixels, 1.15 MB
Author of the photo: H. Michael Miley
License: (CC BY-SA 2.0)
The image was extracted from the original photo.
The original photo is under the photo.


Three American diesel locomotives at night
Three American diesel locomotives at night.
EMD DDA40X No. 6930, EMD DDA40X No. 6936 and a No. 18 of Union Pacific.
During their 60th anniversary, the Illinois Railway Museum (IRM) had a fundraiser that brought in photographers for a chance to shoot some of their more unusual trains.
Illinois, the United States of America.
Taken on: 1 September 2013, 02:13
Size of the photo: 4000 x 2666 pixels, 7.80 MB
Camera model: Canon EOS 7D
Author of the photo: H. Michael Miley
License: (CC BY-SA 2.0)


An American freight train at night
An American freight train at night.
EMD DDA40X diesel-electric locomotive at night.
During their 60th anniversary, the Illinois Railway Museum (IRM) had a fundraiser that brought in photographers for a chance to shoot some of their more unusual trains.
Illinois, the United States of America.
Taken on: 1 September 2013, 02:38
Size of the photo: 1920 x 1080 pixels, 1.32 MB
Author of the photo: H. Michael Miley
License: (CC BY-SA 2.0)
The image was extracted from the original photo.
The original photo is under the photo.


An American freight train at night
An American freight train at night.
EMD DDA40X diesel-electric locomotive at night.
During their 60th anniversary, the Illinois Railway Museum (IRM) had a fundraiser that brought in photographers for a chance to shoot some of their more unusual trains.
Illinois, the United States of America.
Taken on: 1 September 2013, 02:38
Size of the photo: 4000 × 2666 pixels, 8.48 MB
Camera model: Canon EOS 7D
Author of the photo: H. Michael Miley
License: (CC BY-SA 2.0)


EMD DDA40X diesel-electric locomotive at night
EMD DDA40X diesel-electric locomotive at night.
During their 60th anniversary, the Illinois Railway Museum (IRM) had a fundraiser that brought in photographers for a chance to shoot some of their more unusual trains.
Illinois, the United States of America.
Taken on: 1 September 2013, 02:44
Size of the photo: 1920 × 1080 pixels, file size: 1.13 MB
Author of the photo: H. Michael Miley
License: (CC BY-SA 2.0)
The image was extracted from the original photo.
The original photo is under the photo.


EMD DDA40X diesel-electric locomotive at night
EMD DDA40X diesel-electric locomotive at night.
During their 60th anniversary, the Illinois Railway Museum (IRM) had a fundraiser that brought in photographers for a chance to shoot some of their more unusual trains.
Illinois, the United States of America.
Taken on: 1 September 2013, 02:44
Size of the photo: 4000 × 2667 pixels, 7.21 MB
Camera model: Canon EOS 7D
Author of the photo: H. Michael Miley
License: (CC BY-SA 2.0)


Passenger train
The Denver Post's 23rd Annual Cheyenne Frontier Days Train operated on Union Pacific's Greeley Sub to Cheyenne from Denver on 7/19/2014. UP E9s 951, 963B, and 949 were to sub for the usual Northern 844, but when 949 came up with wheel problems, EMD DDA40X No. 6936 was added to help power the 19 car passenger train.
Laramie, Wyoming, the United States of America.
Taken on: 19 July 2014, 17:49
Size of the photo: 1024 × 677 pixels, 448 kB
Author of the photo: Jerry Huddleston
License: (CC BY 2.0)




EMD DDA40X - NEXT PHOTOS


EMD DIESEL LOCOMOTIVES



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