EMD E7

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EMD E7
Afternoon Hiawatha 1956.JPG
Milwaukee Road's 16A and 16B hauling the Afternoon Hiawatha
Specifications
Power type Diesel-electric
Builder General Motors Electro-Motive Division (EMD)
Model E7
Build date February 1945 – April 1949
Total produced 428 A units, 82 B units
AAR wheel arr. A1A-A1A
Gauge 4 ft 8 12 in (1,435 mm)
Wheel diameter 36 in (910 mm)
Minimum curve 21° (273 ft (83.21 m) radius)
Length 71 ft (22 m)
Width 10 ft 6 12 in (3.213 m)
Height 14 ft 11 in (4.55 m)
Locomotive weight A unit: 315,000 lb (143,000 kg), B unit: 290,000 lb (130,000 kg)
Fuel type Diesel
Prime mover (2) EMD 567A
Engine RPM range 800
Engine type Two stroke diesel
Aspiration Roots-type supercharger
Displacement 6,804 cu in (111.50 L) each
Generator (2) EMD D-4
Traction motors (4) GM D7 or D17
Cylinders (2) V12
Top speed 85 mph (137 km/h)
Power output 2,000 hp (1,491 kW) total
Tractive effort 56,500 lb (25,600 kg) starting, 31,000 lb (14,000 kg) continuous
Career
Locale United States
Disposition One preserved in static display, Another, the Original Demonstrator ( Train of Tomorrow) was converted to a E9A and is on static Display, outdoors, Danbury Railway Museum in NYC Livery.

The E7 was a 2,000-horsepower (1,500 kW), A1A-A1A passenger train locomotive built by General Motors' Electro-Motive Division of La Grange, Illinois. 428 cab versions, or E7As, were built from February 1945 to April 1949; 82 booster E7Bs were built from March 1945 to July 1948. (Circa 1953 one more E7A was built by the Los Angeles General Shops of the Southern Pacific by rebuilding an E2A.) The 2,000 hp came from two 12 cylinder model 567A engines. Each engine drove its own electrical generator to power the two traction motors on one truck. The E7 was the eighth model in a line of passenger diesels of similar design known as EMD E-units.

In profile the front of the nose of an E7A was less slanted than on earlier EMD passenger locomotives, and the E7, E8, and E9 units have been nicknamed “bulldog nose” units. Some earlier units were called “shovel nose” units or “slant nose” units.

A Gulf, Mobile and Ohio Railroad E7A, #103-A, appears at the start and end of the 1967 film In The Heat Of The Night.

A Southern Pacific E7A, #6001, is on the point of a train that figures prominently in The Hitch-Hiker, a popular 1960 episode of the anthology television series, The Twilight Zone, starring Inger Stevens. (According to the narration, Steven's character is said to encounter the train somewhere between Pennsylvania and Tennessee, yet the locomotive's number board shows that the train, #99, is the Coast Daylight, which travelled between Los Angeles and San Francisco.)

The only E7 that survives today is owned by the Railroad Museum of Pennsylvania, in Strasburg, Pennsylvania and is ex-Pennsylvania Railroad E7A #5901. This locomotive has been cosmetically restored, and is on indoor display.

Original owners[edit]

Railroad Quantity
A units
Quantity
B units
Road numbers
A units
Road numbers
B units
Notes
Electro-Motive Division (demonstrator)
1
765
to Union Pacific 988 Train of Tomorrow unit. Was rebuilt into an E9A and is currently rusting away at Danbury Railway Museum in Connecticut, wearing NYC colors it never wore when operating.
Alton Railroad
7
101,A–103,A, 100
to GM&O in 1947
Atlantic Coast Line Railroad
20
10
524–543
755–764
Bangor and Aroostook Railroad
2
700–701
renumbered 10–11, Both Re-geared for freight in 1962
Boston and Maine Railroad
21
3800–3820
Baltimore and Ohio Railroad
18
64,A–80,A
Even numbers only
Chicago, Burlington and Quincy Railroad
44
9916A,B–9936A,B, 9937A, 9949
Chicago and Eastern Illinois Railroad
3
1100–1102
Central of Georgia Railway
10
801–810
Chicago and North Western Railway
26
5007B, 5008A,B–5019A,B, 5020A
Chicago, Rock Island and Pacific Railroad
11
9
632–642
633B–634B, 637B–642B
Chesapeake and Ohio Railway
4
95–98
Florida East Coast Railway
17
3
1006–1022
1052–1054
Great Northern Railway
13
500A,B–504A,B, 510A–512A
500A,B–504A,B renumbered 500A–509A
Illinois Central Railroad
14
4
4005–4017, 4000
4100–4103
Louisville and Nashville Railroad
12
458A,B–461A,B, 790–793
Maine Central Railroad
7
705–711
Milwaukee Road
10
16A,B–20A,B
Missouri-Kansas-Texas Railroad
2
101A,B
Missouri Pacific Railroad
9
7
7004–7006, 7010–7011, 7014–7017
7004B, 7010B–7011B, 7014B–7017B
renumbered 13–15, 19–20, 23–26, 13B–15B, 17B–20B
Missouri Pacific Railroad (International-Great Northern Railroad)
3
1
7007, 7012–7013
7012B
renumbered 16, 21–22, 16B
Missouri Pacific Railroad (St. Louis, Brownsville and Mexico Railway)
2
7008–7009
renumbered 17–18
New York Central Railroad
36
14
4000–4035
4100–4113
Pere Marquette Railway
8
101–108
Pennsylvania Railroad
46
14
5900A–5901A, 5840A–5883A
5840B–5864B (even only), 5900B
5901A survives and is preserved
Seaboard Air Line Railroad
32
3
3017–3048
3105–3107
St. Louis-San Francisco Railway
6
2000–2005
Later rebuilt to look like E8's, but retained the same E7 innards
Southern Railway
18
2905–2922
Southern Pacific Company
5
10
6000A–6004A
6000B,C–6004B,C
1
6017
Model E7m, rebuilt from an E2A at Los Angeles Shops.
Spokane, Portland and Seattle Railway
1
750
to Burlington Northern 9900
Texas and Pacific Railway
10
2000–2009
renumbered 1–10
Union Pacific Railroad
4
3
959A–960A, 930A–931A
961B–963B
Joint UP-C&NW
1
2
927A
928B–929B
Joint UP-SP-C&NW
1
2
907A
908B–909B
Wabash Railroad
4
1000, 1001,A, 1002
Total 429 82

See also[edit]

References[edit]

  • Dorin, Patrick C. (1972). Chicago and North Western Power. Superior Publishing. p. 131. ISBN 0-87564-715-4. 
  • Lamb, J. Parker (2007). Evolution of the American Diesel Locomotive. Railroads Past and Present. Bloomington, IN, USA: Indiana University Press. ISBN 9780253348630. 
  • Marre, Louis A. (1995). Diesel Locomotives: The First 50 Years: A Guide to Diesels Built Before 1972. Railroad Reference Series (Book 10). Waukesha, WI, USA: Kalmbach Publishing. ISBN 0890242585. 
  • Pinkepank, Jerry A. (1973). The Second Diesel Spotter’s Guide. Milwaukee, WI: Kalmbach Publishing Company. pp. EMD–121–EMD–123. ISBN 0-89024-026-4. 
  • Schafer, Mike (1998). Vintage Diesel Locomotives. Enthusiast Color Series. Osceola, WI, USA: MBI Publishing. ISBN 0760305072. 
  • Solomon, Brian (2000). The American Diesel Locomotive. Osceola, WI, USA: MBI Publishing. ISBN 0760306664. 
  • Solomon, Brian (2006). EMD Locomotives. St. Paul, MN, USA: Voyageur Press. ISBN 9780760323960. 
  • Solomon, Brian (2010). Vintage Diesel Power. Minneapolis, MN, USA: MBI Publishing. ISBN 9780760337950. 
  • Solomon, Brian (2011). Electro-Motive E-Units and F-Units: The Illustrated History of North America's Favorite Locomotives. Minneapolis, MN, USA: Voyageur Press. ISBN 9780760340073. 
  • Solomon, Brian (2012). North American Locomotives: A Railroad-by-Railroad Photohistory. Minneapolis, MN, USA: Voyageur Press. ISBN 9780760343708. 
  • Wilson, Jeff (2002). E Units: Electro-Motive's Classic Streamliners. Classic Trains / Golden Years of Railroading series. Waukesha, WI, USA: Kalmbach Publishing. ISBN 0890246068. 

External links[edit]