PRR Odd D 10003

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PRR Odd D 10003
PRR Odd D 10003 2.jpg
Odd D #10003
Type and origin
Power type Electric
Builder Baldwin and Westinghouse
Build date 1907
Total produced 1
 • Whyte 4-4-0
 • AAR 2-B
 • UIC 2'B
Gauge 4 ft 8 12 in (1,435 mm) standard gauge
Wheel diameter 72 in (1,800 mm)[1]
Electric system(s) 11 kV, AC, 25 Hz
Current source Pantograph
Internal diagram

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


  1. ^ a b Soloman, Brian (2003). Electric Locomotives. Saint Paul, MN: MBI Publishing. p. 44. ISBN 978-0-7603-1359-6. 


  • Staufer, Alvin (1962). Pennsy Power. Staufer. p. 247. LOC 62-20878. 

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