Invention and Engineering

Baltimore and Ohio P-7

The Baltimore and Ohio’s P-7 class is a class of 20 4-6-2 "Pacific" type locomotives built in 1927. Named for the first 20 Presidents of the United States, they were the prime motive power for the B&O’s top passenger trains for 31 years. One example, Baltimore and Ohio 5300, the "President Washington", has been preserved.

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See also

• ▸Dry ice
• ▸Administrative divisions of Chennai
• ▸Computer monitor

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