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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 production Q2 locomotives were of 4-4-6-4 arrangement; they were the largest non-articulated locomotives ever built and the most powerful locomotives ever static-tested, producing 7,987 hp (5,956 kW) on the PRR's static-test plant. The Q2 locomotives were also the most powerful steam locomotive ever constructed with ten driving wheels.
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.
The PRR Q1 6130 - the only locamotive with this wheel arrangement In Whyte notation , a 4-6-4-4 is a railroad steam locomotive that has four leading wheels followed by six coupled driving wheels , a second set of four driving wheels and four trailing wheels .
PRR Baldwin DS-4-4-660 switcher locomotive PRR EMD E8A passenger locomotive PRR EMD SD45 freight locomotive In June 1937, the Pennsy acquired its first diesel locomotive : a 600-hp diesel-electric switch engine from Electro-Motive Corporation (EMC), a predecessor of General Motors Electro-Motive Division (EMD).
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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) 76,403 pounds-force (340 kN) 7,200 horsepower (5,369 kW) Fast passenger steam locomotive; the magazine Popular Mechanics cites 1941 a speed of 133.4 mph (214.7 km/h) PRR S2: Pennsylvania Railroad ...