EMC AA

AA was a designator used by General Motors' Electro-Motive Corporation for several custom diesel locomotive types that put passenger or baggage space in the same body as the power equipment. The best documented example is a single locomotive built for the Missouri Pacific Railroad, delivered in August 1940 as number 7100 for the Delta Eagle, a short two-car train between Memphis, Tennessee, and Tallulah, Louisiana. Since the train was light, the unit had only one 1,000 horsepower EMD 567 V12 engine and a baggage compartment where the second engine would have gone, which led a standard reference to describe it as half an E6. It was the only Missouri Pacific unit with square windows, on the baggage door. The same classification is also given to the power units of the Pioneer Zephyr, the Flying Yankee and the General Pershing Zephyr.