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Collects steam at the top of the boiler (well above the water level) so that it can be fed to the engine via the main steam pipe, or dry pipe, and the regulator/throttle valve. [2] [5] [6]: 211–212 [3]: 26 Air pump / Air compressor Westinghouse pump (US+) Powered by steam, it compresses air for operating the train air brake system.
Diagram showing lap and lead and their relation to valve travel. When on the move, a steam locomotive requires steam to enter the cylinder at precise times relative to the piston's position. [3] This entails controlling the admission and exhaust of steam to and from the cylinders with a valve linked to the motion of the piston. [3]
The way the valve controlled the steam entering and leaving the cylinder was known as steam distribution and shown by the shape of the indicator diagram. What happened to the steam inside the cylinder was assessed separately from what happened in the boiler and how much friction the moving machinery had to cope with.
An early working model of a steam rail locomotive was designed and constructed by steamboat pioneer John Fitch in the United States probably during the 1780s or 1790s. [40] His steam locomotive used interior bladed wheels [clarification needed] guided by rails or tracks. Union Pacific 844, an "FEF-3" 4-8-4 "Northern" type steam locomotive
An early working model of a steam rail locomotive was designed and constructed by steamboat pioneer John Fitch in the US during 1794. [17] Some sources claim Fitch's model was operable already by the 1780s and that he demonstrated his locomotive to George Washington. [18] His steam locomotive used interior bladed wheels guided by rails or tracks.
At the shed after the day's work is done, the fireman will fill the boiler with water and either bank or dump the fire (i.e. extinguish the fire) or leave the fire to die back according to company policy, apply the locomotive handbrake and if required chock the driver wheels to prevent the locomotive from moving while it is unattended.
An oscillating cylinder engine cannot be reversed by means of the valve linkage (as in a normal fixed cylinder) because there is none. Reversing of the engine can be achieved by reversing the steam connections between inlet and exhaust or, in the case of small engines, by shifting the trunnion pivot point so that the port in the cylinder lines up with a different pair of ports in the port face.
A steam motor is a form of steam engine used for light locomotives and light self-propelled motor cars used on railways. [1] The origins of steam motor cars for railways go back to at least the 1850s, if not earlier, as experimental economizations for railways or railroads with marginal budgets.