Rock Island E6A No. 630, formerly operated by Midland Railway, at Baldwin City, Kansas on November 28, 2004.

By Russell Meier (Own work) [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0/)], via Wikimedia Commons

Rock Island E6A No. 630, formerly operated by Midland Railway, at Baldwin City, Kansas on November 28, 2004.
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An EMD E6 Slideshow.

EMD E6 Diesel Locomotive

The EMD E6 was a 2,000-horsepower, A1A-A1A, passenger train locomotive manufactured by Electro-Motive Corporation, and its corporate successor, General Motors Electro-Motive Division, of La Grange, Illinois. The cab version, or E6A, was manufactured from November, 1939 to September, 1942, and 91 were produced. The booster version, or E6B, was manufactured from April, 1940 to February, 1942, and 26 were produced. The 2,000-horsepower  was achieved by putting two 1,000-horsepower, 12-cylinder, model 567 engines in the engine compartment. Each engine drove its own electrical generator to power the traction motors. The E6 was the seventh model in a long line of passenger diesels of similar design known as EMD E-units.

Compared with passenger locomotives made later by EMD, the noses of the E3, E4, E5,and E6 cab units had pronounced slants when viewed from the side. Therefore, these four models have been nicknamed "slant nose" units. Later E models had the "bulldog nose" of the F series.

One interesting E6 variant custom-produced for the Missouri Pacific was the model EMC AA. This was a motorcar-style unit which had only one prime mover and 1,000 horsepower, and substituted a baggage compartment where the other diesel V-12 would have been.

Original owners

EMD (demonstrator)
A units: 1. No. 1940
Note: to Seaboard Air Line No. 3014.

Atlantic Coast Line Railroad

A units: 22. Nos. 502–523
B units: 5. Nos. 750–754
Note: ACL 501, often identified as an E6A, was built as an E3A but wrecked before delivery and rebuilt by EMC as
an E6A.

Atchison, Topeka and Santa Fe Railway
A units: 4. Nos. 12–15
B units: 3. Nos. 12A, 13A, 15A

Baltimore and Ohio Railroad

A units: 8. Nos. 52, 57–63
B units: 7. Nos. 57x–63x

Chicago and North Western Railway

A units: 4. Nos. 5005A,B, 5006A,B

Chicago, Rock Island and Pacific Railroad
A units: 5. Nos. 627–631

Florida East Coast Railway
A units: 3. Nos. 1003–1005
B units: 1. Nos. 1051

Illinois Central Railroad
A units: 5. Nos. 4000–4004

Kansas City Southern Railway
A units: 2. Nos. 4, 5

Louisville and Nashville Railroad
A units: 16. Nos. 450A,B–457A,B

Milwaukee Road
A units: 2. Nos. 15A, 15B

Missouri Pacific Railroad
A units: 2. Nos. 7002–7003
B units: 2. Nos. 7002B–7003B

Seaboard Air Line Railroad
A units: 2. Nos. 3015–3016
Note: EMD Demonstrator No. 1940 became SAL No. 3014

Southern Railway

A units: 7. Nos. 2800–2802, 2900–2903
B units: 4. Nos. 2900B–2903B

Union Pacific Railroad
A units: 6. Nos. 7M1A, 7M2A, 8M1A, 8M2A, 9M1A, 9M2A

UP-C&NW joint "City of Los Angeles"
A units: 1. No. LA-4
B units: 2. Nos. LA-5, LA-6

UP-SP-C&NW joint "City of San Francisco"
A units: 1. Nos. SF-4
B units: 2. Nos. SF-5, SF-6

Total A units: 91

Total B units: 26

Surviving units
Three E6s survive today. One was operated by the Midland Railway, in Baldwin City, Kansas but has since been sold and may become part of a future museum in Manly, Iowa or possibly be restored to operation. It is ex-Chicago, Rock Island & Pacific Railroad E6A No. 630.

Another E6 is located at the Kentucky Railway Museum, in New Haven, Kentucky. It is ex-Louisville and Nashville E6A No. 770, built as L&N 450B. This unit is for display only, as it came to the museum without a majority of its internal parts.

The final E6, Atlantic Coast Line 501, was built as an E3, wrecked, and rebuilt as an E6. ACL No. 501 has been at or near operational status for much of its life. After retirement from regular service, the unit was restored to purple Champion streamliner colors and run on Midwest fan trips by owner Glenn Monhart. After Mr. Monhart's death, the unit found a home in Spencer, North Carolina, at their prominent railroad museum. This was the only E6 present at "Streamliners at Spencer", the largest assemblage of E-units since retirement from regular service in Chicago around 1993.

Type and origin
Power type: Diesel-electric
Builder: General Motors Electro-Motive Division (EMD)
Model: E6
Build date: November 1939 – September 1942
Total produced: 91 A units, 26 B units
Specifications
AAR wheel arrangement: A1A-A1A
Gauge: 4 ft 8 1⁄2 in
Trucks: EMD Blomberg A-1-A passenger
Wheel diameter: 36 in
Minimum curve: 23° (250.79 ft radius)
Wheelbase: 57 ft 1 in
Length: 70 ft 4 in over coupler pulling faces
Width: 10 ft 7 in
Height: 14 ft 10 in
Locomotive weight: 311,300 lb
Prime mover: (2) EMD 567
Engine RPM range: 800
Engine type: V12 Two-stroke diesel
Aspiration: Roots-type supercharger
Displacement: 6,804 cu in
Generator: (2) EMD D-4
Traction motors: (4) EMD D-7
Cylinders: (2) 12
Performance figures
Power output: 2,000 hp  total
Career
Disposition: Two preserved, remainder scrapped.

See also:
List of GM-EMD locomotives

"City of Los Angeles"

"City of San Francisco"