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A high-pressure steam locomotive is a steam locomotive with a boiler that operates at pressures well above what would be considered normal for other locomotives. Most locomotives operate with a steam pressure of 200 to 300 psi (1.38 to 2.07 MPa). [1]
May 16, 2023 · The essential action of any steam engine, stationary or mobile, is that of steam under pressure (200-300 PSI for most locomotives) entering a cylinder-piston assembly and pushing against the piston as it expands in an effort to reach normal atmospheric pressure.
A common application was in articulated locomotives, the most common being that designed by Anatole Mallet, in which the high-pressure stage was attached directly to the boiler frame; in front of this was pivoted a low-pressure engine on its own frame, which takes the exhaust from the rear engine.
Steam not only pushed the piston out of the cylinder. It also sucked the piston into the cylinder as it condensed. Engines were so large because low-pressure steam took up space. When pressure reached fifty or a hundred pounds per square inch, engines could be a lot smaller.
Jul 18, 2023 · When this high-pressure steam is directed into the cylinders, it pushes against pistons to create mechanical motion. As the steam expands and does its work, it loses pressure and energy. The boiler pressure directly affects the performance and efficiency of the steam locomotive.
Aug 31, 2000 · This book describes the anatomy and physiology of the steam train, to enable all train enthusiasts to understand the workings of the various types of engines in use. It covers the design of the engine, the process of converting fuel into mechanical tractive effort to haul passenger and freight trains, and the function and design of the various ...
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Streamlining reduces pressure drops wherever it is applied, and in consequence it reduces energy losses. Streamlining therefore has the effect of increasing engine (and locomotive) efficiency, thus reducing fuel consumption for a given energy output, and increasing drawbar work produced by a given energy input.
