Do trains release steam or smoke?

As well, steam locomotive exhaust systems typically vent cylinder steam exhaust through the chimney, to enhance the draught through the boiler. Chimneys are designed to carry the exhaust steam and smoke clear of the driver's line of sight while remaining short enough to clear overhead structures.



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The chimney (smokestack or stack in American and Canadian English) is the part of a steam locomotive through which smoke leaves the boiler. As well, steam locomotive exhaust systems typically vent cylinder steam exhaust through the chimney, to enhance the draught through the boiler.

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The steam generated in the boiler not only moves the locomotive, but is also used to operate other devices such as the whistle, the air compressor for the brakes, the pump for replenishing the water in the boiler and the passenger car heating system.

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The white smoke produced is typically pure steam, which is ideal for a steam locomotive since the engine is not wasting any energy. Brown smoke typically arises from the smokestack when poor-quality fuel is used. These fuels may be low-grade coal or even wood.

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After decades of dominance, coal fired locomotives were slowly phased out and replaced with safer and more modern diesel and electric engines. Now, the last mainline steam locomotive has finally been phased out.

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Railroad officials said that with smoking banned, cars would be cleaner, cost less to maintain and have more seats available during rush hour. Railroad officials had advocated a ban based on concerns about health and overcrowding.

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Although steam locomotives were withdrawn from normal railway service in Great Britain in 1968, due to sustained public interest including a locomotive preservation movement, steam hauled passenger trains can still be seen on the mainline railway (i.e. Network Rail owned tracks as opposed to heritage railways) in the ...

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For the first 100 years that railroads were the prime mover of freight and passengers, boiling water in a boiler was the only means of motive power. By the 1960s, steam engines were largely gone from the rails, replaced by diesel power.

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Despite the advent of electric and diesel locomotives in the mid-20th century, steam locomotives continued to be used and constructed into the 21st century. The regular use of steam locomotives in non-tourist revenue service concluded in 2022.

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