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📌 A steam locomotive is a type of railway locomotive that produces its motive power through the use of steam. Steam locomotives were widely used during the 19th and early 20th centuries and played a crucial role in the development of railroads and the transportation of goods and people. Here are some key components and principles of a steam locomotive engine:

👉 Boiler: The boiler is the heart of the steam locomotive's power plant. It generates steam by heating water using coal, wood, or oil as fuel. The boiler consists of a firebox, where the fuel is burned, and a network of tubes and flues where water is heated to produce high-pressure steam.

👉 Firebox: The firebox is where the combustion of fuel takes place. The intense heat from the firebox heats the water in the boiler and generates steam. The firebox is typically located at the front of the locomotive.

👉 Smokestack: The smokestack or chimney is where the exhaust gases and smoke from the firebox are released into the atmosphere.

👉 Steam Dome: The steam dome is a raised, dome-shaped structure on top of the boiler. It collects the steam from the boiler, separating it from the water, and allows dry steam to flow into the steam pipes.

👉 Steam Pipes: Steam from the boiler is piped to the cylinders, which are typically located at the front or sides of the locomotive. The steam is directed into the cylinders to move the pistons.

👉 Cylinders and Pistons: Steam locomotives typically have two or more cylinders. The high-pressure steam from the boiler is admitted into the cylinders, where it pushes pistons back and forth. The reciprocating motion of the pistons is converted into rotary motion to drive the locomotive's wheels.

👉 Valve Gear: The valve gear controls the admission and exhaust of steam from the cylinders. Various types of valve gear, such as the Stephenson valve gear, Walschaerts valve gear, and Baker valve gear, were used in different locomotive designs.

👉 Drive Wheels: Steam locomotives are equipped with large drive wheels, often with flanges to help guide the locomotive on the tracks. The power generated by the pistons is transferred to the drive wheels, propelling the locomotive forward.

👉 Tender: The tender is a separate car or compartment attached to the locomotive, which carries the locomotive's fuel (typically coal or wood) and water. It ensures a steady supply of fuel and water for the locomotive on long journeys.

👉 Brakes: Steam locomotives are equipped with both air and hand brakes to control speed and stop the train.

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