Well they used to run on steam power. Where wood or coal would be burned to make heat that would boil water and boiling water makes steam. When water turns to steam it expands and it can expand with enough power to move pistons. The pistons were usually connected directly to the drive wheels through long connecting rods that connected to the outer edge of the wheel.
Modern day train engines are usually diesel electric. Where a diesel engine is coupled to a electric generator and then the electricity from the electric generator is use to run electric motors which are connected to the drive wheels.
The engine on a train is behind the driver.
The engine of an old train would be a steam engine.
The "Engine".
The engine or locomotive.
In swedish 'lok' means 'train engine"
In most cases the car at the front of a train is the engine or the locomotive. However, sometimes the train is pushed from behind and then the engine is the car at the end.
The weight of a train engine varies depending on the type of engine. A diesel engine can weigh as much as 250 tons while a steam engine would be about 100 tons.
Kilogram
Metal
Deisel
The first train was invented in 1803 by Samuel Homsfray.
Engineer operates the engine of a train. (the driver) Conductor is the Boss of the train.