The EMC EA/EB is an early

passenger train A passenger train is a train used to transport people along a railroad line, as opposed to a freight train that carries goods. These trains may consist of unpowered passenger railroad cars (also known as coaches or carriages) push-pull train, ...

-hauling

diesel locomotive A diesel locomotive is a type of railway locomotive in which the prime mover (locomotive), power source is a diesel engine. Several types of diesel locomotives have been developed, differing mainly in the means by which mechanical power is con ...

built from May 16, 1937, to 1938 by

Electro-Motive Corporation Electro-Motive Diesel (abbreviated EMD) is a brand of diesel-electric locomotives, locomotive products and diesel engines for the rail industry. Formerly a division of General Motors, EMD has been owned by Progress Rail since 2010. Electro-Motive ...

La Grange, Illinois La Grange ( ; often spelled LaGrange) is a village (United States)#Illinois, village in Cook County, Illinois, United States. It is a suburb of Chicago. The population was 16,321 at the 2020 census. History The area around La Grange was first s ...

for the

Baltimore and Ohio Railroad The Baltimore and Ohio Railroad was the oldest railroads in North America, oldest railroad in the United States and the first steam engine, steam-operated common carrier. Construction of the line began in 1828, and it operated as B&O from 1830 ...

. They were the first model in a long line of passenger diesels of similar design known as

EMD E-unit EMD E-units were a line of passenger train streamliner diesel locomotives built by the Electro-Motive Diesel, General Motors Electro-Motive Division (EMD) and its predecessor the Electro-Motive Corporation (EMC). Final assembly for all E-units ...

s. Each locomotive unit developed from two Winton 201-A

diesel engine The diesel engine, named after the German engineer Rudolf Diesel, is an internal combustion engine in which Combustion, ignition of diesel fuel is caused by the elevated temperature of the air in the cylinder due to Mechanics, mechanical Compr ...

s, driving the wheels through an electric transmission—the generator driven by each engine provided current for

traction motor A traction motor is an electric motor used for propulsion of a vehicle, such as locomotives, electric vehicle, electric or hydrogen vehicles, or electric multiple unit trains. Traction (engineering), Traction motors are used in electrically powe ...

s. The locomotives were of A1A-A1A

wheel arrangement In rail transport, a wheel arrangement or wheel configuration is a system of classifying the way in which wheels are distributed under a locomotive. Several notations exist to describe the wheel assemblies of a locomotive by type, position, and c ...

—two three-axle

trucks A truck or lorry is a motor vehicle designed to transport freight, carry specialized payloads, or perform other utilitarian work. Trucks vary greatly in size, power, and configuration, but the vast majority feature body-on-frame construction ...

of which only the outer two

axle An axle or axletree is a central shaft for a rotation, rotating wheel and axle, wheel or gear. On wheeled vehicles, the axle may be fixed to the wheels, rotating with them, or fixed to the vehicle, with the wheels rotating around the axle. In ...

s were powered. Six two-unit locomotives were produced, each consisting of a lead cab-equipped EA

A unit An A-unit, in railroad terminology, is a diesel locomotive (or more rarely an electric locomotive) equipped with a driving cab and a control system to control other locomotives in a multiple unit, and therefore able to be the lead unit in a c ...

and a cabless booster EB

B unit A B-unit, in railroad terminology, is a locomotive unit (generally a diesel locomotive) which does not have a control cab or crew compartment, and must therefore be operated in tandem with another coupled locomotive with a cab (an A-unit) ...

. They were numbered 51 through 56; the A units bore the bare number and the B units the number followed by 'X'.

Trains hauled

The six locomotives hauled some of the major named trains of the B&O; the ''

Royal Blue Royal blue is a deep and vivid shade of blue. It is said to have been created by a consortium of mills in Rode, Wiltshire (in Somerset as of 1937), which won a competition to make a robe for Queen Charlotte, consort of King George III. I ...

'', the '' Capitol Limited'', the ''

National Limited The ''National Limited'' was the premier train of the Baltimore and Ohio Railroad (B&O) on its route between Jersey City, New Jersey, and St. Louis, Missouri, with major station stops in Washington, D.C., and Cincinnati, Ohio. (Buses took passeng ...

'', and others. These trains were

streamliner A streamliner is a vehicle incorporating streamlining in a shape providing reduced air resistance. The term is applied to high-speed railway trainsets of the 1930s to 1950s, and to their successor " bullet trains". Less commonly, the term i ...

s in appearance, but they were built largely of refurbished heavyweight

passenger car A car, or an automobile, is a motor vehicle with wheels. Most definitions of cars state that they run primarily on roads, seat one to eight people, have four wheels, and mainly transport people rather than cargo. There are around one billio ...

s rebuilt with smooth sides, smooth rooflines, air conditioning, new interiors and modern appointments. B&O 52 was sold to the

Alton Railroad The Alton Railroad was the final name of a railroad linking Chicago to Alton, Illinois; St. Louis, Missouri; and Kansas City, Missouri. Its predecessor, the Chicago and Alton Railroad , was purchased by the Baltimore and Ohio Railroad in 1931 an ...

in 1940. This locomotive became a

Gulf, Mobile and Ohio Railroad The Gulf, Mobile and Ohio was a Class I railroad in the central United States whose primary routes extended from Mobile, Alabama, and New Orleans, Louisiana, to St. Louis, Missouri, St. Louis and Kansas City, Missouri, as well as Chicago, Illin ...

unit in 1947.

Significance and influence

The EA/EB—along with the more-or-less simultaneous E1 for the

Atchison, Topeka and Santa Fe Railway The Atchison, Topeka and Santa Fe Railway , often referred to as the Santa Fe or AT&SF, was one of the largest Class 1 railroads in the United States between 1859 and 1996. The Santa Fe was a pioneer in intermodal freight transport; at vario ...

and the E2 for the

Union Pacific Railroad The Union Pacific Railroad is a Railroad classes, Class I freight-hauling railroad that operates 8,300 locomotives over routes in 23 U.S. states west of Chicago and New Orleans. Union Pacific is the second largest railroad in the United Stat ...

Chicago and North Western Railway The Chicago and North Western was a Railroad classes#Class I, Class I railroad in the Midwestern United States. It was also known as the "North Western". The railroad operated more than of track at the turn of the 20th century, and over of t ...

and

Southern Pacific Railroad The Southern Pacific (or Espee from the railroad initials) was an American Railroad classes#Class I, Class I Rail transport, railroad network that existed from 1865 to 1996 and operated largely in the Western United States. The system was oper ...

—represented an important step in the evolution of the passenger diesel locomotive. While the EA, E1 and E2 were each built for a specific railroad, they were largely identical mechanically and were a step further away from the custom-built, integrated

and towards mass-produced passenger locomotives—a step achieved with the E3 and E6, EMD's later models.

Styling

The EA/EB and E1 featured largely identical and innovative styling showing the influence of the Electro-Motive Corporation's new buyer

General Motors General Motors Company (GM) is an American Multinational corporation, multinational Automotive industry, automotive manufacturing company headquartered in Detroit, Michigan, United States. The company is most known for owning and manufacturing f ...

. While mechanically they had much in common with previous, experimental EMC locomotives, GM understood the importance of looking new and exciting, not primerely being technically innovative. This basic "slant nose" style was continued in the subsequent E3, E4, E5 and E6 models, while a more "bulldog nose" style was tried in the E2 and a style somewhere in between was used for the E7, E8 and E9, as well as the

EMD F-Units EMD F-units are a line of diesel-electric locomotives produced between November 1939 and November 1960 by General Motors Electro-Motive Division and General Motors-Diesel Division. Final assembly for all F-units was at the GM-EMD plant at La Gran ...

. Its initial design was protected under US Patent D106,918.

Preservation

B&O #51, the first EA built, has been preserved at the

Baltimore and Ohio Railroad Museum The B&O Railroad Museum is a museum and historic railway station exhibiting historic railroad equipment in Baltimore, Maryland. The Baltimore and Ohio Railroad (B&O) company originally opened the museum on July 4, 1953, with the name of the Balt ...

Baltimore, Maryland Baltimore is the List of municipalities in Maryland, most populous city in the U.S. state of Maryland. With a population of 585,708 at the 2020 United States census, 2020 census and estimated at 568,271 in 2024, it is the List of United States ...

. The EA has completed cosmetic restoration and is now on exhibit.

References

Notes

Bibliography

* * * * * * * * * * {{DEFAULTSORT:EMC EA EB A1A-A1A locomotives E0 Baltimore and Ohio locomotives Passenger locomotives Diesel–electric locomotives of the United States Railway locomotives introduced in 1937 Locomotives with cabless variants Standard-gauge locomotives of the United States Streamlined diesel locomotives