Railroad classes are the system by which freight railroads are designated in the United States. Railroads are assigned to Class I, II or III according...

increased grate area from previous classes' 55 to 70 sq ft (5.1 to 6.5 m2). The boiler barrel was fatter than previous classes, and the increase in heating...

In the United States, railroads are designated as Class I, Class II, or Class III, according to size criteria first established by the Interstate Commerce...

Pennsylvania Railroad's class H8, H9s and H10s steam locomotives were of the 2-8-0 "Consolidation" type, the last three classes of such built by the railroad. The...

are four different classes of freight railroads: Class I, regional, local line haul, and switching & terminal. Class I railroads are defined as those...

The Pennsylvania Railroad's class B1 comprised 42 electric switcher locomotives built between 1926 and 1935. They were of 0-6-0 wheel arrangement in the...

Railroad GG1 is a class of streamlined electric locomotives built for the Pennsylvania Railroad (PRR), in the northeastern United States. The class was...

The Pennsylvania Railroad (PRR) class T1 duplex-drive 4-4-4-4 steam locomotives, introduced in 1942 with two prototypes and later in 1945-1946 with 50...

The Pennsylvania Railroad's S2 class was a steam turbine locomotive designed and built in a collaborative effort by Baldwin Locomotive Works and Westinghouse...

Look up class in Wiktionary, the free dictionary. Class, Classes, or The Class may refer to: Class (biology), a taxonomic rank Class (knowledge representation)...

The PRR S1 class steam locomotive (nicknamed "The Big Engine") was a single experimental duplex locomotive of the Pennsylvania Railroad. It was designed...

The M1 was a class of steam locomotive of the Pennsylvania Railroad (PRR). It was a class of heavy mixed-traffic locomotives of the 4-8-2 "Mountain" arrangement...

The Pennsylvania Railroad (PRR) class I1s steam locomotives were the largest class of 2-10-0 "Decapods" in the United States. From 1916 to 1923, 598 locomotives...

Class E6 on the Pennsylvania Railroad was the final type of 4-4-2 "Atlantic" locomotive built by the railroad, and second only to the Milwaukee Road's...

The Pennsylvania Railroad G5 is a class of 4-6-0 steam locomotives built by the PRR's Juniata Shops in the mid-late 1920s. It was designed for passenger...

service into the 1930s. The sub-classes differed as follows:[page needed] In the first decade of the twentieth century classes E2 and E3 handled all of the...

The Pennsylvania Railroad's class A5s was the largest class of 0-4-0 steam locomotives. The Pennsylvania Railroad built 47 in its Juniata Shops between...

standard classes. The PRR was the first American railroad to adopt the Westinghouse air brake, the first tests of which were made in September 1869; Class A...

The Pennsylvania Railroad's class B6 was its most successful class of switcher locomotive, or as the PRR termed them "shifter". The PRR preferred the...

The Pennsylvania Railroad's class O1 comprised eight experimental boxcab electric locomotives built in 1930 and 1931. They were built in preparation for...

The Pennsylvania Railroad's class FF1 was an American electric locomotive, a prototype numbered #3931 and nicknamed "Big Liz". It was built in 1917 to...

The Pennsylvania Railroad's class P5 comprised 92 mixed-traffic electric locomotives constructed 1931–1935 by the PRR, Westinghouse and General Electric...

Railroad DD1 was a class of boxcab electric locomotives built by the Pennsylvania Railroad. The locomotives were developed as part of the railroad's New...

The Pennsylvania Railroad's class L5 were the railroad's second generation of production electric locomotives after the DD1, and the last to use a jackshaft...

Pennsylvania Railroad class E2c comprised a pair of experimental C-C (AAR) or Co-Co (UIC) electric locomotives. The bodywork and running gear was produced...

all of the Pennsylvania Railroad's steam locomotives. Mechanically, these locomotives were identical to the C&O's T-1 class 2-10-4s. As initially built...

Class D16 on the Pennsylvania Railroad was their final development of the 4-4-0 "American" type of steam locomotive. A total of 429 of these locomotives...

In the United States, a Class II railroad, sometimes referred to as a regional railroad, is a railroad company that is not Class I, but still has a substantial...

The Pennsylvania Railroad (PRR) A3 was an 0-4-0 class steam locomotive that were built at Altoona Works between 1895 until 1905. A3s were used to shunt...

rectifier-equipped locomotive built by General Electric for the Pennsylvania Railroad between 1960 and 1963. The PRR used them for freight service on the Northeast...