Why do steam trains tow a diesels on the back?

In the interim, until all steam locomotives were modified to work an air-braked train, they were required to be fitted with a through air pipe so a diesel or electric locomotive could be attached in order to provide assistance in the event of failure of the steam locomotive.



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Traditionally, the cab on a steam locomotive is at the rear, behind the boiler. This allows the fireman easy access to the coal in the tender and it is easy for the driver and fireman to communicate. They are also more enclosed and protected from the weather.

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Power plant capacity is far greater than any individual locomotive uses, so electric locomotives can have a higher power output than diesel locomotives and they can produce even higher short-term surge power for fast acceleration.

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The steam is exhausted through a nozzle and up through the smokebox into the stack. This action produces the “chuff chuff” sound heard when the locomotive is moving. A draft or vacuum results, pulling air through the firebox grates to induce combustion of the coal.

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The train whistle, or horn, is an important part of our safety practices. The horn alerts people that a train is approaching a railroad crossing. It can also be used to warn animals or trespassers in our right-of-way along a section of track.

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The pistons push or pull the rods connected to the drive wheels, providing the force needed to move the locomotive. The steam is exhausted through a nozzle and up through the smokebox into the stack. This action produces the “chuff chuff” sound heard when the locomotive is moving.

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In the earliest years of steam railways trains did stop frequently, so all the facilities could be found at the station: Toilets, refreshments, sale of meals into the train. As the trains went on longer distances with fewer, shorter stops, they also had toilets installed.

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Mechanical transmission is the simplest type; it is mainly used in very low-power switching locomotives and in low-power diesel railcars. Basically it is a clutch and gearbox similar to those used in automobiles. A hydraulic coupling, in some cases, is used in place of a friction clutch.

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4472 Flying Scotsman, the GWR claimed that the Castle was Britain's most powerful express locomotive. In subsequent locomotive exchanges, the GWR locomotive won the battle in terms of speed, power and economy and this led to improvements being made to the LNER Pacific design.

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Environment - Emissions from diesel engines contribute to the production of ground-level ozone which damages crops, trees and other vegetation. Also produced is acid rain, which affects soil, lakes and streams and enters the human food chain via water, produce, meat and fish.

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During the very early days of steam locomotives, water stops were necessary every 7–10 miles (11–16 km) and consumed much travel time. With the introduction of tenders (a special car containing water and fuel), trains could run 100–150 miles (160–240 km) without a refill.

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In 1934, The Flying Scotsman became the first locomotive to achieve a speed of 100 miles per hour and dramatically reduced the journey time between the two capitals. The end of her career on the East Coast mainline in 1963 was not the end of her story though.

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