Richmond, Fredericksburg and Potomac Steam Locomotives
The classifications given by railroads to their steam locomotive fleets were as varied as the machines themselves with several different designations within a particular class! The Richmond, Fredericksburg and Potomac steam locomotives were likewise characterized by a wide range of classes although the railroad chose to use numbers to designate its differing steam types rather than letters (as was commonly used by most other carriers). In any event, the information here is most certainly not a complete, all-time listing of RF&P's steam fleet and also is merely meant to list the general types of steam locomotives operated by the railroad.
The Richmond, Fredericksburg and Potomac Railroad was not a large system, connecting only Washington, D.C. and Richmond, Virginia, a distance of roughly 113 miles. However, its strategic location allowed it to connect with virtually every major northeastern and southeastern railroad, which made the RF&P very successful.
Interestingly, for its small size the RF&P actually owned some large steam locomotives including 4-8-4 Northerns, 2-8-4 Berkshires, and even a small roster of 2-8-8-2 articulateds! Unfortunately, today no Richmond, Fredericksburg and Potomac steam locomotives are known to exist.
Class 1
The RF&P's Class 1 was its sole roster of articulated steam, of the 2-8-8-2 wheel arrangement (purchased second-hand from the Chesapeake & Ohio Railway originally designated as the C&O's Class H-7).
Class 31
The RF&P's Class 31 was its fleet of 0-6-0 switchers.
Class 35
The RF&P's Class 35 was more of its fleet of 0-6-0 switchers.
Class 41
The RF&P's Class 41 was more of its fleet of 0-6-0 switchers.
Class 71
The RF&P's Class 71 was its fleet of 0-8-0 switchers.
Class 91
The RF&P's Class 91 was more of its fleet of 0-8-0 switchers.
Class 101
The RF&P's Class 101 was its fleet of 4-6-0 Ten-Wheelers.
Class 106
The RF&P's Class 106 was more of its fleet of 4-6-0 Ten-Wheelers.
4-6-2 Pacifics
The RF&P's Pacifics were its largest fleet of steam locomotives and included Classes 251, 256, 264, 301, 325, 401, and 403.
Class 501
The RF&P's Class 501 was its fleet of 4-8-2 Mountains.
Class 515
The RF&P's Class 515 was more of its fleet of 4-8-2 Mountains.
Class 551
The RF&P's Class 551 was its fleet of 4-8-4 Northerns.
Class 571
The RF&P's Class 571 was its lone roster of 2-8-4 Berkshires.
Class 601
The RF&P's Class 601 was more of its fleet of 4-8-4 Northerns.
For more reading about the Richmond, Fredericksburg and Potomac Railroad you might want to consider the book Richmond, Fredericksburg and Potomac Railroad's Passenger Service: 1937-1973 by author William E. Griffin. While the railroad did not operate very many of its own passenger trains it ferried many of the posh trains operated by other systems like the Atlantic Coast Line and Seaboard Air Line to other lines.
Also consider Perfecting the American Steam Locomotive by author J. Parker Lamb. As the name implies the book details the earliest history of steam engine technology, even before it was used in railroad applications. His book later explores the development of steam locomotive technology in the United States from the 19th through the 20th centuries, covering not only the most popular steam locomotive designs but also the most successful manufactures to build them. The book has received excellent reviews and is a great resource on steam locomotives and a fine reference tool; you should find it very useful. If you're interested in perhaps purchasing either (or both) of these books please visit the links below which will take you to ordering information through Amazon.com, the trusted online shopping network.