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 Seaboard Air Line steam locomotives were likewise characterized by a wide range of classes from A to R. In any event, the information here is most certainly not a complete, all-time listing of SAL's steam fleet and also is merely meant to list the general types of steam locomotives operated by the railroad.
The Seaboard Air Line is perhaps best remembered for being a somewhat smaller version of the Atlantic Coast Line as everywhere the ACL went so too did the SAL (and thus it is not surprising that the two would decide to merge in the late 1960s). This is not to say, however, that the SAL was an inferior road to the ACL, quite the contrary. The Seaboard held its own with its fiercest competitor and after managing to pull through troubled waters during the early years of its life, the railroad provided quality freight transportation to the Southeast.
While the SAL operated through the relatively flat Southeast it did roster some massive steam locomotives for its hillier western lines including 2-10-2 Santa Fes, 2-8-8-2s, and 2-6-6-4s. Today, none of the railroad's large arcticulateds survive but three 2-10-0 Decapods do along with a few others. For information regarding preserved SAL steam locomotives please click here.
Class A
The SAL's Class A included its fleet of massive 2-8-8-2 Mallets.
Class B
The SAL's Class B included its fleet of 2-10-2 Santa Fes.
Class D
The SAL's Class D included its fleet of 2-10-0 Decapods.
Class E
The SAL's Class E included its fleet of 4-4-0 Americans.
Class F
The SAL's Class F included its fleet of 0-6-0 switchers and ranged from Class F1 to F9.
Class G
The SAL's Class G included more its fleet of 4-4-0 Americans.
Class H
The SAL's Class H included its fleet of 2-8-0 Consolidations.
Class I
The SAL's Class I included its fleet of 4-6-0 Ten-Wheelers and 2-6-0 Moguls
Class K
The SAL's Class K included more its fleet of 4-6-0 Ten-Wheelers.
Class L
The SAL's Class L ranged from 4-6-0 Ten-Wheelers to 2-8-0 Consolidations (and even 0-6-0 switchers as with Class L5).
Class M
The SAL's Class M included its fleet of 4-8-2 Mountains.
Class P
The SAL's Class P included its fleet of 4-6-2 Pacifics.
Class Q
The SAL's Class Q included its fleet of 2-8-2 Mikados.
Class R
The SAL's Class R included the railroad's largest fleet of steamers it ever owned, 2-6-6-4 heavy articulateds in mountain/drag service.
For more information about Seaboard Air Line successor, Seaboard Coast Line and the Family Lines system consider the book Seaboard Coast Line Family Lines Railroad 1967-1986 from William Griffin, Jr. The book, filled with colored photographs, gives a great overview of the mergers (Seaboard Coast Line, the marketed Family Lines name, and Seaboard System) leading up to the eventual formation of CSX Transportation in 1987. If you're interested in perhaps purchasing this book please visit The Railroad Diamond by clicking the tab in the menu to your left marked "TRD Store".