Pennsylvania Railroad Odd D 10003

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PRR Odd D 10003
Odd D #10003
Type and origin Power type Electric Builder Baldwin and Westinghouse Build date 1907 Total produced 1
Specifications Configuration: ​  • Whyte 4-4-0OE  • AAR 2-B  • UIC 2'B Gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge Wheel diameter 72 in (1,800 mm)[1] Electric system/s 11 kV, AC, 25 Hz Current pickup(s) Pantograph

Pennsylvania Railroad's Odd D #10003 was an experimental electric locomotive built in 1907 by Baldwin and Westinghouse.^[1] 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, #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.

• Staufer, Alvin F.; Pennypacker, Bert (1962). Pennsy Power: Steam and Electric Locomotives of the Pennsylvania Railroad, 1900-1957. Research by Martin Flattley. Carollton, Ohio: Alvin F. Staufer. p. 247. ISBN 978-0-9445-1304-0.

• LIRR Early Electric Engines (TrainsAreFun.com)

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