AA was a designator used for several different

diesel locomotive A diesel locomotive is a type of railway locomotive in which the prime mover is a diesel engine. Several types of diesel locomotives have been developed, differing mainly in the means by which mechanical power is conveyed to the driving whee ...

types custom built by

General Motors Corporation The General Motors Company (GM) is an American Multinational corporation, multinational Automotive industry, automotive manufacturing company headquartered in Detroit, Michigan, United States. It is the largest automaker in the United States and ...

EMC/GM with passenger or baggage space in the same body. This locomotive is listed as class AA-6 by R. Craig, and the designation is logical as the locomotive is described as "half an E6" in the Second Diesel Spotter's Guide. One such was a single locomotive built for the

Missouri Pacific Railroad The Missouri Pacific Railroad , commonly abbreviated as MoPac, was one of the first railroads in the United States west of the Mississippi River. MoPac was a Class I railroad growing from dozens of predecessors and mergers. In 1967, the railroad ...

, delivered in August 1940, numbered #7100. MP 7100 was built for service with the ''Delta Eagle'' passenger train, which ran between

Memphis, Tennessee Memphis is a city in the U.S. state of Tennessee. It is the seat of Shelby County in the southwest part of the state; it is situated along the Mississippi River. With a population of 633,104 at the 2020 U.S. census, Memphis is the second-mos ...

and

Tallulah, Louisiana Tallulah is a city in and the parish seat of Madison Parish, Louisiana, Madison Parish in northeastern Louisiana, United States. The 2010 population was 7,335, a decrease of 1,854, or 20.2 percent, from the 9,189 recorded at the 2000 United Sta ...

. Note: Missouri Pacific ordered all their 'E' units with portholes instead of square windows like most of the E series from the EA to E7's. This was the only MoPac unit with square windows (on the baggage door). Since the two-car train the unit would have to haul was comparatively light, the AA was built with only one 1,000 hp EMD 567

V12 V12 or V-12 may refer to: Aircraft * Mil V-12, a Soviet heavy lift helicopter * Pilatus OV-12, a planned American military utility aircraft * Rockwell XFV-12, an American experimental aircraft project * Škoda-Kauba V12, a Czechoslovak experim ...

prime mover Prime mover may refer to: Philosophy *Unmoved mover, a concept in Aristotle's writings Engineering * Prime mover (engine), motor, a machine that converts various other forms of energy (chemical, electrical, fluid pressure/flow, etc) into energy ...

, and a baggage compartment where the second diesel would have been. Other EMC/GM locomotives carrying the AA classification include the

Pioneer Zephyr The ''Pioneer Zephyr'' is a diesel-powered trainset built by the Budd Company in 1934 for the Chicago, Burlington & Quincy Railroad (CB&Q), commonly known as the Burlington Route. The trainset was the second internal combustion-powered streaml ...

Flying Yankee The ''Flying Yankee'' was a diesel-electric streamliner built in 1935 for the Maine Central Railroad and the Boston and Maine Railroad by Budd Company and with mechanical and electrical equipment from Electro-Motive Corporation. It was also the ...

, and

General Pershing Zephyr The ''General Pershing Zephyr'' was the ninth of the Chicago, Burlington & Quincy Railroad's ''Zephyr'' streamliners, and the last built as an integrated streamliner rather than a train hauled by an EMD E-unit diesel locomotive. It was constr ...

power units.

External links

Photo of 7100 pulling the Delta Eagle

References

* * {{EMD cab and cowl A1A-3 locomotives AA6 Missouri Pacific Railroad Passenger locomotives Diesel-electric locomotives of the United States Railway locomotives introduced in 1940 Scrapped locomotives Standard gauge locomotives of the United States