Limit load for rail vehicles
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