Locomotives use diesel engines thus run on diesel fuel, they do not use gasoline.
Different steam locomotives use different fuels, some of these are:woodbituminous coalanthracite coalfuel oiletc.
Most if not all locomotives have switched over from the old style of a burning fuel source to a completely electric design. Pretty much every locomotive in use today have switched over to a hybrid design.
The majority of trains in the 1940s were pulled by steam locomotives (some diesel locomotives had been introduced in the 1930s but they were not common on the mainlines). These were usually fueled with either coal or fuel oil. There were a few railroads using electric locomotives on specific sections of track (e.g. the Great Northern Railway over the Cascade Range in Washington state).
Steam locomotives are fueled by burning combustible materials such as coal, wood or oil. There are both fuel and water suppliers carried with the locomotive.
Power plants, steam locomotives, and some homes.
Most modern locomotives are powered by diesel engines or electricity. Diesel-electric locomotives use a diesel engine to generate electricity, which then powers electric traction motors that drive the wheels. Electric locomotives draw power from overhead lines or an electrified rail system, allowing for efficient and high-speed operation. Additionally, some newer locomotives are exploring alternative energy sources, such as hydrogen fuel cells and battery-electric systems, to reduce emissions and increase sustainability.
Locomotives develop power primarily through their engines, which can be diesel or electric. Diesel locomotives use a diesel engine to drive a generator that produces electricity, powering electric traction motors connected to the wheels. Electric locomotives draw power from overhead lines or an electrified rail, directly driving traction motors. The combination of engine design, traction system, and weight distribution enables locomotives to efficiently convert fuel or electrical energy into the traction needed to move heavy loads.
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Diesel electric is used on locomotives because the diesel electric system is much cleaner and quieter and more efficient than the old steam locomotives. The diesel fuel is used to run a generator which produces electric power which is used to power the electromagnetic drive motors mounted on the locomotives axles!
The train that heats up water in a boiler is typically a steam locomotive. These locomotives use a boiler to convert water into steam, which then drives the pistons or turbines that propel the train. The combustion of fuel, such as coal, wood, or oil, generates the heat needed to produce steam in the boiler. Steam locomotives played a significant role in the development of rail transport during the 19th and early 20th centuries.
Gasoline, and in the early days of aviation all gasoline was the same.