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The Q2 locomotive was 78% more powerful than the locomotives that PRR had in service at the time, and the company claimed the Q2 could pull 125 freight cars at a speed of 50 mph (80 km/h). [5] These were an improved version of the previous Q1 class, which was a 4-6-4-4 dual-purpose engine instead of a 4-4-6-4 freight engine.
The Q class comprised what were effectively 4-10-4s with the driving axles split into two driven groups. The Q2 was the most powerful non-articulated steam locomotive ever built and also holds the record for highest horsepower recorded by any steam locomotive at 7,987 hp. Q1 - experimental duplex freight locomotive. Q2 - duplex freight locomotive.
A 4-4-6-4, in the Whyte notation for the classification of steam locomotives by wheel arrangement, is one that has four leading wheels followed by four coupled driving wheels, a second set of six coupled driving wheels and four trailing wheels. The Pennsylvania Railroad's Q2 class were the
In operation, the Q2 could outperform pre-existing freight engines hauling double the tonnage of their predecessors. Furthermore, the Q2 had no problems building up steam power and was known to be a very smooth-riding engine. 26 were built at PRR's Altoona Works, and they were by far the most successful duplex type. The duplex propensity to ...
The Duplex and Experimental Steam Engines of the PRR; Pennsylvania Railroad S2 steam turbine "Modern Power For Today's Trains" - A promotional booklet put out by the PRR in 1949 showcasing the railroads latest motive power. Archived 2017-12-14 at the Wayback Machine "The Keystone" Magazine - Autumn 2012 Volume 45 - Number 3 - The S2 Turbine 686
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.
On April 10, 1942, H.W. Jones, Chief of Motive Power, told Altoona that the Q1, #6130, would be considered a passenger engine as far as striping and lettering were concerned. [6] During its short service life, it spent more time in shops or the engine-house than being run, accumulating only about 165,000 service miles in its career (1942–1949 ...
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.
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