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The Milwaukee F7s are accepted as the fastest steam locomotives by a different measure—scheduled speed between stations. In 1939, shortly after they were introduced into passenger service, the Twin Cities Hiawatha schedule was modified such that the engines would need to run the 78.3 mi (126.0 km) between Portage and Sparta, Wisconsin in 58 ...
On one side was the development of a steam turbine locomotive, eventually designated as Class V1 resembling the later Chesepeake & Ohio M-1, albeit with a 4-8-0+4-8-0 wheel arrangement. This locomotive spent years in development, but never materialized, though did culminate in the construction of the S2 of 1944.
GE steam turbine locomotives; Gov. Stanford; Grand Trunk Western 5629; Great Northern 2507; Great Northern 2584; Great Northern F-8; Great Northern H-5; Great Northern M-1; Great Northern O-1; Great Northern P-1; Great Northern P-2; Great Northern Q-1; Great Northern S-1; Great Northern S-2; Great Smoky Mountains Railroad 1702
Its high-speed capability was such that many have claimed that the S1 exceeded on multiple occasions the 126 mph (203 km/h) record steam locomotive speed set in 1938 by the British LNER locomotive 4468 Mallard. The engine was claimed to have exceeded 152 mph (245 km/h) on the Fort Wayne-Chicago run, as it was reported that the PRR received a ...
Pennsylvania Railroad 5550 (PRR 5550) is a mainline duplex drive steam locomotive under construction in the United States. With an estimated completion by 2030, the locomotive will become the 53rd example of the Pennsylvania Railroad's T1 steam locomotive class and the only operational locomotive of its type, [7] as well as the largest steam locomotive built in the United States since 1952.
Most powerful steam locomotive ever static tested. PRR S1: Pennsylvania Railroad: 6100 Altoona Works: 1939 Steam 6-4-4-6: 487 tonnes (537 short tons) 340 kilonewtons (76,403 lbf) 5,369 kilowatts (7,200 hp) Fast passenger steam locomotive; the magazine Popular Mechanics cites 1941 a speed of 133.4 mph (214.7 km/h) PRR S2: Pennsylvania Railroad: 6200
The locomotive's cruising speed was 70 miles per hour (110 km/h), at which point the throttle was on "seven." During a trial run with a reporter from Popular Mechanics aboard, a C&O engineer expressed his dissatisfaction with a local speed limit of 75 miles per hour (121 km/h), noting that he would "sure like to be able to pull it back to eleven!"
The Pennsylvania Railroad K4 was a class of 425 4-6-2 steam locomotives built between 1914 and 1928 for the Pennsylvania Railroad (PRR), where they served as the primary mainline 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.