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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 ...
If for the high-speed American type 2-6-1 with an average design axle load from the driving wheel pair on the rail - 26.9 tons - back in 1926, it was possible to successfully implement the specified traction and speed characteristics, then for the high-speed Soviet design version, taking into account given axial load - 20 tons, the number of ...
The first London and North Eastern Railway (LNER) Class A2 was a class of 4-6-2 steam locomotive designed by Vincent Raven for the North Eastern Railway (as NER class 4.6.2). [1] Two were built by the NER in 1922 before the grouping and another three by the LNER in 1924. Their LNER numbers were 2400–2404. All five locomotives were named by ...
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Under the Whyte notation for the classification of locomotives, 4-6-4 represents the wheel arrangement of four leading wheels, six powered and coupled driving wheels and four trailing wheels. In France where the type was first used, it is known as the Baltic while it became known as the Hudson in most of North America. [1]
The firing order is 1-3-4-2. The standard version of the engine produces 92 kW and has a torque of 422 Nm. The combustion chamber system was licensed by MAN. The engine was produced in the versions 4 VD 14,5/12-1 SRW and 4 VD 14,5/12-2 SRW, the later revision was built primary for the NVA.
Both locomotives were rebuilt to non-compound 4-6-2 types in 1915, retained their assigned numbers, were still in use as of 1944, and retired by 1950. A somewhat more successful passenger Mallet design was a Russian 2-4-4-0 built between 1903 and 1909; the last examples were used into the 1950s.