EMD E7

EMD E7
Pennsylvania Railroad E7A #5901 on display at the Railroad Museum of Pennsylvania in 2015.
Type and origin 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
Specifications Configuration: ​  • AAR A1A-A1A Gauge 4 ft 8+1⁄2 in (1,435 mm) Wheel diameter 36 in (914 mm) Minimum curve 21° (274.37 ft or 83.63 m radius) Length 71 ft (22 m) Width 10 ft 6+1⁄2 in (3.213 m) Height 14 ft 11 in (4.55 m) Loco weight A unit: 315,000 lb (143,000 kg), B unit: 290,000 lb (130,000 kg) Fuel type Diesel Prime mover (2) EMD 12-567A RPM range 800 Engine type V12 Two-stroke diesel Aspiration Mechanical via Roots blower Displacement 6,804 cu in (111.50 L) each Generator (2) EMD D-4 Traction motors (4) GM D7 or D17 or D27 Cylinders (2) 12
Performance figures Maximum speed 85–117 mph (137–188 km/h) Power output 2,000 hp (1,491 kW) total Tractive effort 56,500 lbf (251,000 N) starting, 31,000 lbf (140,000 N) continuous
Career Locale United States Disposition One preserved on static display, remainder scrapped.

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, and it became the best selling E model upon its introduction.

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.

In film

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.)

In the 2010 miniseries The Pacific, filmed in Melbourne, S313, an example of the similar A16C export model, was painted to resemble Louisville & Nashville Railroad E7A 758 for filming, however it retained the livery for a short while after filming wrapped.

Surviving example

Ex-Pennsylvania Railroad E7A #5901 is preserved as the only surviving example of the E7. This locomotive has been cosmetically restored, and is currently on indoor display at the Railroad Museum of Pennsylvania, in Strasburg, Pennsylvania.

Original owners

A total of 428 cab-equipped lead A units and 82 cabless-booster or B units were built. Approximately thirty railroads purchased A units, B units, or both. The single largest buyer was the Pennsylvania Railroad, which purchased 46 A units and 14 B units. Other significant buyers included the New York Central Railroad (36 A units and 14 B units), Chicago, Burlington and Quincy Railroad (44 A units), Seaboard Air Line Railroad (32 A units and 3 B units), and Atlantic Coast Line Railroad (20 A units and 10 B units).

See also

• List of GM-EMD locomotives

References

• Pinkepank, Jerry A. (1973). The Second Diesel Spotter's Guide. Milwaukee, Wisconsin: Kalmbach Publishing. pp. EMD–121–EMD–123. ISBN 978-0-89024-026-7.
• Wilson, Jeff (2017). Guide to North American Diesel Locomotives. Waukesha, Wisconsin: Kalmbach Publishing. ISBN 978-1-62700-455-8.

Further reading

• Dorin, Patrick C. (1972). Chicago and North Western Power. Burbank, California: Superior Publishing. p. 131. ISBN 0-87564-715-4.
• Lamb, J. Parker (2007). Evolution of the American Diesel Locomotive. Railroads Past and Present. Bloomington, Indiana: Indiana University Press. ISBN 978-0-253-34863-0.
• Marre, Louis A. (1995). Diesel Locomotives: The First 50 Years: A Guide to Diesels Built Before 1972. Railroad Reference Series. Waukesha, Wisconsin: Kalmbach Publishing. ISBN 978-0-89024-258-2.
• Schafer, Mike (1998). Vintage Diesel Locomotives. Enthusiast Color Series. Osceola, Wisconsin: MBI Publishing. ISBN 978-0-7603-0507-2.
• Solomon, Brian (2000). The American Diesel Locomotive. Osceola, Wisconsin: MBI Publishing Company. ISBN 978-0-7603-0666-6.
• Solomon, Brian (2006). EMD Locomotives. St. Paul, Minnesota: Voyageur Press. ISBN 978-0-7603-2396-0.
• Solomon, Brian (2010). Vintage Diesel Power. Minneapolis, Minnesota: MBI Publishing. ISBN 978-0-7603-3795-0.
• Solomon, Brian (2011). Electro-Motive E-Units and F-Units: The Illustrated History of North America's Favorite Locomotives. Minneapolis, Minnesota: Voyageur Press. ISBN 978-0-7603-4007-3.
• Solomon, Brian (2012). North American Locomotives: A Railroad-by-Railroad Photohistory. Minneapolis, Minnesota: Voyageur Press. ISBN 978-0-7603-4370-8.
• 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

• Kristopans, Andre J. "EMD E unit Serial numbers".
• Bachand, Jean-Denis. "EMC E7 Data Sheet". Retrieved 27 January 2013.
• Railroad Museum of Pennsylvania – #5901 page (Archive of Webpage here.)