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Chesapeake & Ohio Tests the PRR T1 - Chesapeake and Ohio Historical Magazine, May 2005 by Stephenson, David R - The C&O test report contains information that is not widely known, and some of it contradicts generally accepted beliefs about the T1. Photos of PRR 4-4-4-4 locomotives; An N Scale PRR T1 4-4-4-4 scratch building project; A group that ...
The PRR also desired to apply the duplex principle to freight haulage, and the Q1 was the first experiment in that direction. It was a 4-6-4-4 fast freight locomotive, delivered in May 1942. Like the B&O's George H. Emerson it had the second pair of cylinders facing backwards, and all were fitted with standard Walschaerts valve gear.
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.
Numbers 5500 through 5524 would be constructed at the PRR's Altoona Works while 5525 through 5549 would be constructed at Baldwin. As operation continued, problems arose. The T1 class was known for violent uncontrollable wheel slip as well as performance and maintenance issues caused by the Franklin oscillating-cam Poppet valves. [4]
These were both withdrawn from service by the mid-1920s.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.
However before it could be built, the PRR placed an order for two locomotives of this type in July 1940. This implied that the S1 was a showpiece exclusively built for the World's Fair instead of replacing the K4s as the new prime power of the PRR. The PRR T1 was developed when the S1 was under construction or on display in the World Fair. [30]
PRR FF1 experimental locomotive PRR GG1 #4890 at the National Railroad Museum in Green Bay, Wisconsin. When work on the Hudson River tunnels and New York's Penn Station was in progress, the type of electric locomotives to be used was an important consideration. At that time only a few electric locomotives existed.
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.