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The Pennsylvania Railroad's class Q2 comprised one prototype and twenty-five production duplex steam locomotives of 4-4-6-4 wheel arrangement built between 1944 and 1945. [ 1 ] [ 3 ] [ 4 ] [ 2 ] They were the largest non- articulated locomotives ever built and the most powerful locomotives ever static tested, producing 7,987 cylinder horsepower ...
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 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.
The Q2 4-4-6-4 was the most successful example of the duplex locomotive constructed by the PRR. Production locomotives followed from the end of 1944, but these were rather different, the lesson that backward-facing cylinders next to the firebox were a poor design choice made clear.
Pages in category "Pennsylvania Railroad locomotives" The following 79 pages are in this category, out of 79 total. ... Pennsylvania Railroad Q2 class; R.
Ranking member Rep. Brendan Boyle, (D-PA, center) and Chairman Jodey Arrington (R-Texas, right) attend the House Budget Committee markup of the budget resolution for FY2025 in Cannon building on ...
Our Q2 subscription gross margin was 87%. Overall, operating income in the quarter was $45.3 million or 16% of revenue. Free cash flow in the quarter was $57.2 million.
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.