Whilever the tractive effort is greater than the train resistance the train will continue to move forward, once the resistance exceeds the tractive effort, then the train will start to slow down, and eventually stop moving forward. The driving force is the tractive effort ( Steam or Diesel ) produced by the locomotive, whilst the resisting force is the resistance presented by the train. The diagram below shows the two key forces impacting on the ability for a train to move. To understand how a train will move forward, it is necessary to understand the principle mechanical forces acting on the train. The diesel has similarities in the fact that it relies on the burning of fuel oil to to drive a diesel engine, which generally is used to drive a generator, traction motors and finally a gearbox. The steam is then used to do work by injecting the steam into the cylinders to drive the wheels around and move the locomotive forward. The steam locomotive is a heat engine which converts heat energy generated through the burning of fuel, such as coal, into heat and ultimately steam. Whilst this page is specifically aimed at steam locomotives, a lot of the principles, and physics are similar for diesel and electric locomotives.
Locomotive tractive effort must be greater then the train resistance forces.
Useful References Principles for Train Movement Key Points to Remember
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It would be great to have some feedback, as this helps to ensure the accuracy of the information and model.įor information on how to apply resistance settings within Open Rails, refer to the Resistance Setting page. If you wish to provide any feedback on this page, please use the contact page. Aim - This page is dedicated to describing the different types of resistance that impact a trains and how they have been modelled within Open Rails.
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