The EMC EA/EB is an early passenger train-hauling diesel locomotive built from May 16, 1937, to 1938 by Electro-Motive Corporation of La Grange, Illinois for the Baltimore and Ohio Railroad. 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 General Motors Electro-Motive Division (EMD) and its predecessor the Electro-Motive Corporation (EMC). Final assembly for all E-units was in La Grange, Illino ...

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

diesel engine The diesel engine, named after Rudolf Diesel, is an internal combustion engine in which ignition of the fuel is caused by the elevated temperature of the air in the cylinder due to mechanical compression; thus, the diesel engine is a so-ca ...

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 or hydrogen vehicles, elevators or electric multiple unit. Traction motors are used in electrically powered rail vehicles ( electric multiple ...

s. The locomotives were of

A1A-A1A The AAR wheel arrangement system is a method of classifying locomotive (or unit) wheel arrangements that was developed by the Association of American Railroads. Essentially a simplification of the European UIC classification, it is widely used in ...

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

A unit A, or a, is the first letter and the first vowel of the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is ''a'' (pronounced ), plural ''aes'' ...

and a cabless booster EB

B unit B, or b, is the second letter of the Latin-script alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is ''bee'' (pronounced ), plural ''bees''. It re ...

. 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 clothiers in Rode, Somerset, a consortium of whom won a competition to make a dress for Queen Charlotte, consort of King George III. Brightness The ''Oxford E ...

'', the ''

Capitol Limited The ''Capitol Limited'' is a daily Amtrak train between Washington, D.C., and Chicago, running via Pittsburgh and Cleveland. Service began in 1981 and was named after the Baltimore and Ohio Railroad's ''Capitol Limited'' which ended in 197 ...

'', 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 passen ...

'', and others. These trains were streamliners in appearance, but they were built largely of refurbished heavyweight

passenger car A car or automobile is a motor vehicle with wheels. Most definitions of ''cars'' say that they run primarily on roads, seat one to eight people, have four wheels, and mainly transport people instead of goods. The year 1886 is regarded as ...

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 a ...

in 1940. This locomotive became a

Gulf, Mobile and Ohio 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 and Kansas City, Missouri, as well as Chicago, Illinois. From its two ...

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 larger railroads in the United States. The railroad was chartered in February 1859 to serve the cities of Atchison, Kansas, Atchison and Top ...

and the E2 for the

Union Pacific Railroad The Union Pacific Railroad , legally Union Pacific Railroad Company and often called simply Union Pacific, is a freight-hauling railroad that operates 8,300 locomotives over routes in 23 U.S. states west of Chicago and New Orleans. Union Paci ...

Chicago and North Western Railway The Chicago and North Western was a 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 track in seven states befor ...

and Southern Pacific Railroad—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 streamliner 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. While mechanically they had much in common with previous, experimental EMC locomotives, GM understood the importance of looking new and exciting, not merely 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 freight diesel

cab unit In North American railroad terminology, a cab unit is a railroad " locomotive" with its own cab and controls. "Carbody unit" is a related term, which may be either a cabless booster unit controlled from a linked cab unit, or a cab unit that con ...

s. 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 ( , locally: or ) is the List of municipalities in Maryland, most populous city in the U.S. state of Maryland, fourth most populous city in the Mid-Atlantic (United States), Mid-Atlantic, and List of United States cities by popula ...

. 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