Limit load for rail vehicles

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The limit load is a trailer load ( wagon train mass ) that can be transported reliably over a certain distance by one or more locomotives at a certain speed. Reserves for fluctuating input variables (weather / engine power) and for smooth operational processes are taken into account.

With the limit load, basic statements can be made about:

  • Performance of the locomotives and their suitability for transport tasks,
  • Train composition and the peculiarities of the timetable design,
  • Availability of the train paths and ensuring the performance of the routes,
  • Feasibility of assistance in the event of an average can be gained.

There are 3 types of limit loads:

  • Starting limit load:
is the load that can be carried by a locomotive depending on its starting tractive effort , the given route resistance and the permissible drive load of the locomotive.
  • Trailer load:
results from the tensile forces available at different driving speeds and the given route resistance in N / kN.
  • Drawbar load:
depends on the strength of the drawbar. Corresponding values ​​are announced by the department responsible for the railway company. B. from the Bundesbahn-Zentralamt Minden in the document "Largest gross mass of trains according to the strength of the draw gear at the moment of arrival".

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Helmut Lehmann, Driving dynamics of the train journey, Shaker Verlag Aachen 2005, ISBN 3-8322-4384-4