Locomotive
LocomotiveIn the beginning of transportation there were mainly horse and buggy, but then they developed a steam engine and they develop canals for steam boats. About five years later the people decided to start railroads because it was easier to lay and could be lain almost anywhere. So I will tell you about the steam engine, how it works, also about the steam locomotion, and I will present a model of an early British train.
The old reciprocating steam locomotive is driven by a steam engine. Steam from the boiler is fed to the cylinders to move pistons back and forth (reciprocating motion). Connecting rods from the pistons then move the driving the driving wheels. The firebox at the rear end of the boiler is fed with coal or oil, which in a large locomotive is stored in a separate tender. The tender also contains the water that is directed up the smokestack to create a heavy draft for the boiler fire. The discharge of the used steam from the cylinders is controlled by valves, and the intermittent release of the steam up the stack is responsible for the locomotive's puffing.
Valve gearing plays a major role in the steam locomotive because a wide range of effect is required of the engine. If the load on the engine is increased, The engine would tend to slow down. The engine governor moves the location of the eccentric in order to increase the length of time during which steam is admitted to the cylinder. As more steam is admitted, the engine output increases. The efficiency of the engine decreases, however, because the steam no longer expand fully.
Some steam locomotives weigh 500 tons(450 metric tons) or more and can develop more than 6,000 horsepower. They can pull a long train or a passenger train at about 100 miles(160 kilometers) per hour. For extremely heavy loads or steep grades, two or more locomotives may be coupled to a train.
______________________________________________________________________________
LOCOMOTIVE WHISTLE AND HORN...
To view the complete essay, you be registered.