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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. This locomotive design was a further development of the highly successful 2-10-4.
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.
Pennsylvania Railroad class D1; Pennsylvania Railroad class D2; Pennsylvania Railroad class D3; Pennsylvania Railroad class D4; Pennsylvania Railroad class D5; Pennsylvania Railroad class D6; Pennsylvania Railroad class D7; Pennsylvania Railroad class D14; Pennsylvania Railroad class D15; Pennsylvania Railroad class D16; Pennsylvania Railroad ...
Pennsylvania Railroad Q2 class; S. Saxon XV HTV This page was last edited on 30 December 2013, at 02:47 (UTC). Text is available under the Creative Commons ...
Pennsylvania Railroad class E3b; Pennsylvania Railroad class FF1; Pennsylvania Railroad class J28; Pennsylvania Railroad class K5; Pennsylvania Railroad class O1; Pennsylvania Railroad class Q1; Pennsylvania Railroad class R1; Pennsylvania Railroad class S1; Pennsylvania Railroad class S2; Pennsylvania Railroad K29 class; Pennsylvania Railroad ...
A nonprofit group known as the T1 Trust is in the process of constructing a new duplex locomotive, a T1-class engine known as Pennsylvania Railroad 5550, intending to utilize design improvements from the postwar steam era not used or seldom tested on pre-existing T1s in the hope of creating better performance characteristics. The estimated year ...
As of 2020 the only operable Pennsylvania Railroad steam locomotive is class B4a engine # 643, built in July 1901 in Altoona. Engine 643 is maintained by volunteers of the Williams Grove Historical Steam Engine Association outside of Harrisburg, and is operated several weekends each summer. [ 63 ]