UP No. 949, an EMD E9 shown here at Clinton, Iowa.

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UP No. 949, an EMD E9 shown here at Clinton, Iowa.
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An EMD E9 Slideshow.

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EMD E9 Diesel Locomotive
The E9 is a 2,400-horsepower, A1A-A1A passenger train-hauling diesel locomotive built by General Motors' Electro-Motive Division of La Grange, Illinois between April 1954 and January 1964. 100 cab-equipped A units were produced and 44 cabless booster B units, all for service in the United States. The E9 was the tenth and last model of EMD E-unit and differed from the earlier E8 as built only by the newer engines and a different, flusher-fitting mounting for the headlight glass, the latter being the only visible difference. Since some E8s were fitted with this, it is not a reliable way to distinguish the two. The E9 has two 1,200 hp, V12 model 567C engines, each engine driving one generator to power two traction motors.

Engine and powertrain
The E9 uses twin 12 cylinder 567C engines developing a total of 2,400 hp at 800 rpm. Designed specifically for railroad locomotives, this Roots-blown, naturally-aspirated 2-stroke 45-degree V-type, with an 8 1⁄2 by 10 in, bore by stroke, giving 567 cubic inches displacement per cylinder, remained in production until 1966. Two D.C. generators, one per engine, provide power to four motors, two on each truck, in an A1A-A1A arrangement. This truck design was used on all E units and on MP 7100 and CB&Q 9908 power cars. EMD has built all of its major components since 1939.

Operation
The E9 powered American passenger and mail trains from the 1950s into the late 1970s. Many of America's finest trains — such as Union Pacific Railroad's "City" fleet, Burlington's "Zephyr" fleet and Southern Pacific Railroad's Coast Daylight and Sunset Limited — had E9s pulling them. E9s and their E7 and E8 kin ran throughout the country on lesser-known passenger trains, Chicago's network of commuter trains and many mail and express trains. As America's passenger train network shrank due to non-profitibility, Union Pacific, Rock Island and Illinois Central Railroad began using E9s on freight trains.

Amtrak, founded in 1971, bought 36 E9As and 23 E9Bs from the Union Pacific, Milwaukee Road, B&O and SCL. Amtrak used the E9s until the late 1970s and converted some E9B units to steam generator and head end power cars.

Original owners

Baltimore and Ohio Railroad
A units: 4. Nos. 34, 36, 38, 40
Note: all bought by Amtrak.

Chicago, Burlington and Quincy Railroad
A units: 16. Nos. 9985A, B–9989A, B, 9990–9995
Note: Renumbered into 9900-9924 series (with 9 E8As). Rebuilt with 645 power assemblies and HEP. Used in Chicago suburban service into the 1990s.

Chicago and Eastern Illinois Railroad
A units: 1. No. 1102
Note: to Missouri Pacific Railroad.

Chicago, Milwaukee, St. Paul and Pacific Railroad
A units: 12. Nos. 200A,C–205A,C
B units: 6. Nos. 200B–205B
Note: Built to Union Pacific specifications for City train service. Renumbered 30ABC–35ABC.
A units: 6. Nos. 36A,C–38A,C
Note: Built with Head end power for commuter service.

Florida East Coast Railway
A units: 5. Nos. 1031–1035
Note: to Illinois Central 2036-2040 in 1969 via Precision National

Illinois Central Railroad
A units: 10. Nos. 4034–4043
B units: 4. Nos. 4106–4109

Kansas City Southern Railway
A units: 1. No. 25
Note: Model E9m.

Seaboard Air Line Railroad
A units: 1. No. 3060
Note: bought by Amtrak.

Southern Pacific Railroad
A units: 9. Nos. 6046–6054
Note: See also SP 6051.

Union Pacific Railroad
A units: 35. Nos. 900–914, 943–962
B units: 34. Nos. 910B–913B, 950B–974B

Total A units: 100

Total B units: 44

Surviving examples
Many E9s survive today. According to Andrew Toppan's list of March 5, 1997, 42 survive. Four E9s are owned by the Illinois Railway Museum, in Union, Illinois. A number of railroads keep a small number in service for hauling inspection specials, charter passenger trains, investor tours, and the like. The Union Pacific Railroad rosters three, (951, 949, and 963B), which have been re-engined with single EMD 16-645E engines for commonality with other UP power and thus ease of maintenance. ex-CB&Q 9995 sits in Alamosa,CO as SLRG 9925.

EMD E9 Overview

Type and origin
Power type: Diesel
Builder: General Motors Electro-Motive Division (EMD)
Model: E9
Build date: April 1954 – January 1964
Total produced:100 A units, 44 B units
Specifications
AAR wheel arrangement: A1A-A1A
Gauge: 4 ft 8 1⁄2 in
Wheel diameter: 36 in
Minimum curve: 57°  104.79 ft, 27°  214.18 ft
Length: 70 ft 3 in
Width: 10 ft 7 1⁄2 in
Height:  14 ft 7 in
Locomotive weight: A unit: 315,000 lb, B unit: 290,000 lb
Fuel type: Diesel
Prime mover: (2) EMD 567C
Engine type: V12 Two-stroke diesel
Traction motors: (4) GM D37
Cylinders: 12
Performance figures
Maximum speed: 117 mph
Power output: 2,400 hp
Tractive effort: 56,500 lb starting, 31,000 lb continuous
Career
Locale: United States
Disposition: many scrapped, several preserved, none in revenue service though some used on special trains.

See also:

List of GM-EMD locomotives

EMC-EMD

Diesel-Electric Locomotives

Locomotives

Southern Pacific No. 6051