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The Pennsylvania Railroad's Odd D No. 10003.
Baldwin Locomotive Works logo.
Westinghouse logo.
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A line drawing of the PRR Odd D locomotive.
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PRR Keystone herald.
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The Pennsylvania Railroad's Odd D No. 10003 was an experimental electric locomotive built in 1907 by Baldwin and Westinghouse. Photo circa 1911.

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A line drawing of the PRR Odd D locomotive.

PRR Odd D 10003 Electric Locomotive
Pennsylvania Railroad's Odd D No. 10003 was an experimental electric locomotive built in 1907 by Baldwin and Westinghouse. It had a 4-4-0 wheel arrangement in the Whyte notation, or 2-B in the AAR scheme. On the PRR, class D was assigned to 4-4-0 locomotives. Production classes of locomotive were assigned a number after the letter, but one-off locomotives were simply designated "Odd".

In testing, No. 10003 proved to be more stable at speed than the two class AA1 B-B locomotives the PRR had also constructed, so its 4-4-0 arrangement and high center of gravity was chosen as the design for the PRR's DD1 production locomotives.

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PRR Odd D 10003 Overview
Type and origin
Power type: Electric
Builders: Baldwin and Westinghouse
Build date: 1907
Total produced: 1

Specifications
Configuration: 4-4-0
AAR wheel arrangement: 2-B
UIC class: 2'B
Gauge: 4 ft 8 1⁄2 in (1,435 mm) standard gauge
Wheel diameter: 72"
Electric systems: 11 kV, AC, 25 Hz
Current collection: Pantograph

Career

Operator: Pennsylvania Railroad
Disposition: Scrapped

See also:

Electric Locomotives