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Baltimore & Ohio No. 50 in 1972 at the EMD plant for its 50 year celebration.

Baltimore & Ohio #50 in 1972 at the EMD plant for its 50 year celebration.
The Shovel-nosed Chicago and Alton No. 50 powering the Abraham Lincoln.

The Shovel-nosed Chicago and Alton No. 50 powering the Abraham Lincoln.

See also:

B&O

Baltimore & Ohio herald.

Baltimore & Ohio No. 50 - EMC 1800 HP B-B Diesel Locomotive

Electro-Motive Corporation (later Electro-Motive Division, General Motors) produced five 1800 hp B-B experimental passenger train-hauling Diesel locomotives in 1935; two company-owned demonstrators, #511 and #512, the Baltimore and Ohio Railroad's #50, and two units for the Atchison, Topeka and Santa Fe Railway, Diesel Locomotive #1. In addition, two single power cars and two twin-unit power cars for the Chicago, Burlington and Quincy Railroad's Zephyr streamliners were built to fundamentally the same design, but clad in Budd Company streamlined stainless steel carbodies. These were #9904 Pegasus and #9905 Zephyrus for the Twin Zephyrs, and #9906A/B Silver King/Silver Queen and #9907A/B Silver Knight/Silver Princess for the Denver Zephyrs.

All were the mechanical ancestors to EMD's successful E-units, with identical pairs of 900 hp Winton 201-A Diesel engines, although they ran on AAR type B two-axle trucks instead of the A1A trucks of E-units. When delivered, the units were fitted with shrouding around their trucks, but this did not last long.

The boxy carbodies of all but the Zephyrs were the work of GE's Erie, Pennsylvania works, EMD having not yet developed the ability to produce their own bodywork. Like most boxcabs, they had control cabs at both ends, a feature that would only rarely be repeated in future North American locomotives, although it would become common elsewhere.

Baltimore & Ohio 50
Baltimore and Ohio Railroad #50 was fundamentally identical to EMC 1800 hp B-B demonstrators 511 and 512 when delivered. In this form, it hauled the first Diesel-powered Royal Blue until the introduction of the EA/EB units in 1937.

Following that, it had a semi-streamlined "shovel nose" applied to one end, and transferred to the B&O-owned Chicago and Alton Railroad to haul the Abraham Lincoln. When the Alton left B&O control in the merger that created the Gulf, Mobile and Ohio Railroad, #50 entered the GM&O roster as #1200. After World War II, the shovel-nose treatment was removed, restoring the unit to its prior boxcab appearance. The locomotive was placed into local freight service until it was retired, upon which it was donated to the Museum of Transportation, St. Louis, Missouri, where it remains.

Type and origin
Power type: Diesel-electric
Builder: Electro-Motive Corporation
Serial number: 532
Build date: August 1935
Total produced: 1
Specifications
Career
Operators: Baltimore and Ohio Railroad, Chicago and Alton Railroad, Gulf, Mobile and Ohio Railroad
Numbers: B&O 50, C&A 50, GM&O 1200
Official name: 1800 hp B-B
Locale: North America
Current owner: Museum of Transportation, St. Louis, Missouri
Disposition: Museum artifact

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