Power at rail

Power at rail

The power at rail is the amount of power which a train applies to achieve the tractive effort.

Power at rail is measured in kilowatts.

The power at rail of a train follows the equation "power (kW) = force (kN) x speed (m/s)"

Diesel locomotives

A sample of UK rail locomotives are included on the below table to illustrate their "power at rail".

The power at rail only includes the power which reaches the rail to create tractive effort and excludes power which is used for heating, cooling, lighting, etc. and also excludes power wasted by inefficiencies of the vehicle (including the production of sound and heat energy).

team locomotives

British railway companies showed a curious reluctance to reveal horsepower figures for their steam locomotives but these are believed to have been in the range 2,000 to 2,500 horsepower (1500-1875 kW) for the largest locomotives. The largest American articulated locomotives are believed to have delivered around 6,000 horsepower (4,500 kW), equivalent to three or four contemporary diesel locomotives.

ee also

* tractive effort
* maximum tractive effort
* continuous tractive effort
* power classification

External links

* [http://www.twoof.freeserve.co.uk/motion1.htm A simple guide to train physics]
* [http://www.brightlemon.com/ma/what_use/TractiveEffortAccelerationAndBraking.doc Tractive effort, acceleration and braking]


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