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The usual locomotive valve gears such as Stephenson, Walschaerts, and Baker valve gear, can be used with either slide valves or piston valves. Where poppet valves are used, a different gear, such as Caprotti valve gear may be used, though standard gears as mentioned above were used as well, by Chapelon and others.
The Walschaerts valve gear on a steam locomotive (a PRR E6s).. The valve gear of a steam engine is the mechanism that operates the inlet and exhaust valves to admit steam into the cylinder and allow exhaust steam to escape, respectively, at the correct points in the cycle.
SECR N class No. 1850 with experimental J. T. Marshall valve gear. James Thompson Marshall (1854, Glanford Brigg, Lincolnshire [1] - 1931, Knaresborough, Yorkshire [2]) was an English railway and mechanical engineer known for inventing the 'Marshall valve gear' for steam locomotive use.
Cylinder design and valve events were not optimal, so the Claughton Class was a mediocre performer on the track. [1] LMS No. 5986 c.1928, with enlarged boiler. The LNWR reused numbers and names from withdrawn locomotives, with the result that the numbering was completely haphazard. An exception was made for the LNWR's war memorial locomotives.
The Baker valve gear replaces the expansion link of the Walschaerts gear with an assembly of levers and links which produces the same effect of allowing continuous variation valve travel. The remainder of the gear is the same, so that the return crank and combination lever take the same form, although the proportions are usually modified.
[5] [7]: 18 Early American locomotives had bar frames, made from steel bar; in the 20th century they usually had cast steel frames or, in the final decades of steam locomotive design, a cast steel locomotive bed – a one-piece steel casting for the entire locomotive frame, cylinders, valve chests, steam pipes, and smokebox saddle, all as a ...
K5 #5698 used conventional Walschaerts valve gear and piston valves, and developed a starting tractive effort of 54,675 lbf (243.21 kN). During the New York World’s Fair of 1939-40, K5 5698 was displayed along with several other PRR locomotives at the fair.
There, No. 1744 would operate alongside some other active steam locomotives, including Union Pacific 2-8-0 No. 618, Sierra Railway 2-8-2 "Mikado" No. 36, and Santa Maria Valley 2-8-2 No. 100. No. 1744 would also perform some famous doubleheaders with the other locomotives, which would also only happen on Labor Day weekends.