How a steam locomotive works

The Engine Shed at the GCR

A steam locomotive operates by converting the energy from burning coal into mechanical motion.

Here’s a simplified breakdown of the process:

Step 1

Combustion:

Coal is burned in the firebox, producing heat.

Step 2

Boiler:

The heat generated from the firebox turns water in the boiler into steam.

Step 3

Steam Pressure:

The high-pressure steam is directed into cylinders, where it pushes pistons back and forth.

Step 4

Cylinder and Pistons:

The high-pressure steam is directed into cylinders, where it pushes pistons back and forth.

Step 5

Connecting Rods and Wheels:

The pistons are connected to the locomotive’s driving wheels via connecting rods. As the pistons move, they turn the wheels.

Step 6

Exhaust:

After doing its work, the steam is released through the chimney, creating the characteristic exhaust sound.