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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, which uses four pairs of driving wheels with a four-wheel guiding truck in front for stability at speed and a two-wheel trailing truck to support the large firebox needed for sustained power.
Pennsylvania Railroad 6755 is a preserved M1b class 4-8-2 "Mountain" type steam locomotive built in 1930 for the Pennsylvania Railroad by the railroad's own Altoona Works as a member of the M1b locomotive class for mainline freight service.
PRR Class M1. The 4-8-2 was most popular on the North American continent. When the 4-6-2 Pacific fleets were becoming overburdened as passenger trains grew in length and weight, the first North American 4-8-2 locomotives were built by the American Locomotive Company (ALCO) for the Chesapeake and Ohio Railway (C&O) in 1911.
These were both withdrawn from service by the mid-1920s. In 1942, the PRR built 123 2-10-4 "Texas" type locomotives based on C&O plans; class J now being unoccupied, it was reused for them. The PRR J1 was an improved version of its C&O counterpart with more pulling power. J1 - 2-10-4 freight locomotives. J28 - experimental 2-6-2 locomotives.
See also PRR locomotive classification. ... Pennsylvania Railroad class M1; N. ... This page was last edited on 2 January 2014, ...
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 were produced (123 at Altoona Works and 475 at Baldwin Locomotive Works). They were the dominant freight locomotive on the system until World War II and remained
The L1s shared the boiler and many other components with the K4s 4-6-2 "Pacific" type, giving a total of 425 locomotives with many standard parts. [1]Although the L1s type was quite successful, it was very much eclipsed in PRR service by the larger and more powerful I1s/I1sa 2-10-0 "Decapods", which arrived in service only two years after the L1s and were very suited to the PRR's mountain ...
The Pennsylvania Railroad K4 was a class of 425 4-6-2 steam locomotives built between 1914 and 1928 for the PRR, where they served as the primary main line passenger steam locomotives on the entire PRR system until late 1957. Attempts were made to replace the K4s, including the K5 and the T1 duplex locomotive.
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