Because they used steam engines, which rely on fire to turn water into steam to power pistons which makes the train move.
Also, while in use some of the steam is always released, creating big steam clouds around the locomotive.
Compared to Diesel and Electric trains, steam trains use more fuel and takes a lot longer to get going from cold.
trains x
Steam trains were once widespread, and changed the world. A steam engine is an external combustion engine, meaning that the fuel burns outside the engine. In modern internal combustion engines the petrol or diesel burns inside the engine, and the gases produced expand and push the cylinders, and this motion eventually turns the wheels. In the steam engine the fuel burns in an external fire box. The heat boils the water to make steam, which pushes the cylinders. So it depends exactly what you mean by 'run'. Certainly there were and are steam trains, but the steam doesn't provide the energy to make it go, the fuel does.
Elijah McCoy invented the automatic lubricator which is used to oil the steam engines of trains and ships. Elijah McCoy was not only an inventor but also an engineer.
steam engine powers are used for the transport application in the early days. Later modified versions of the steam engines are used also for the electrical energy generation.
Gland steam is used in engineering to prevent air from entering the steam chest.
steam engine trains.
Steam coal
trains used to run on steam, when they ran out they wouldnt be able to move anymore. its the same for people, when your "running out of steam" your getting tired, and weak
The same things modern trains are used for: hauling cargo and people.
steam trains were used to pull carriage's full of coal, tanks of oil, wood, and clothing cloths, and any other stuff used in the cities that was going to be used in the factories
Up until about 1950 ... everywhere.
trains x
its more efficient and diesel trains consume more natural resources like oil which is also used for planes, cars and boats. only steam trains use coal.
they are outdated and not used anymore
they are outdated and not used anymore
Efficiency and cost. The maintenance of a steam engine can be very costly as compared to a diesel engine as well.
Steam engine trains used to be the only type of train that would work. They used to be iconic and were significant in the understanding of railroads. Today, steam engine trains offer no real advantages to other modes of transportation.