page_title: Pennsylvania Railroad Odd D 10003
hierarchical_section_title: Pennsylvania Railroad Odd D 10003
caption_attribution_description: Pennsylvania Railroad PRR Odd D 10003, an experimental 4-4-0 electric locomotive built in 1909.
context_page_description: Pennsylvania Railroad's Odd D #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, #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.
context_section_description: Pennsylvania Railroad's Odd D #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, #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.
caption: Odd D #10003
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