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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 Pennsylvania Railroad's Q2 class were the only locomotives ever to use this arrangement. These were duplex locomotives, in which both sets of driving wheels were mounted in a common, rigid locomotive frame.
These ships were ordered in fiscal years 1900 (ACR-4 to ACR-6) and 1901 (ACR-7 to ACR-9) as part of the naval buildup touched off by the Spanish–American War. [4] Together with the four immediately succeeding Tennessee-class ships they were called the "Big Ten". [5] They were originally intended to operate in the battle line with battleships ...
The second USS Pennsylvania (ACR/CA-4), also referred to as Armored Cruiser No. 4, and later renamed Pittsburgh, was a United States Navy armored cruiser, the lead ship of her class. She was originally assigned the name Nebraska but was renamed Pennsylvania on 7 March 1901.
The Pennsylvania Railroad (reporting mark PRR), legal name The Pennsylvania Railroad Company, also known as the "Pennsy", was an American Class I railroad that was established in 1846 and headquartered in Philadelphia, Pennsylvania.
Q1 was the last dual service locomotive designed by the Pennsylvania Railroad, but there is no substantial evidence showing that it was assigned to passenger service. Q1's design was able to reduce dynamic argument by 60% compared to the J1 class above 70 mph (110 km/h), but it exceeded the railroad's 50 mph (80 km/h) speed limit for the ...
The other was the "Blue Ridge" class for the Virginian Railway. These were some of the most powerful reciprocating steam locomotives ever built, at 7,500 hp (which was exceeded by only the Pennsylvania Railroad class Q2 in indicated horsepower), and one of the heaviest at 386 tons for the locomotive itself plus 215 tons for the loaded tender.
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