Tractive effort

In railway engineering, the term tractive effort describes the pulling or pushing capability of a locomotive. The published tractive force value for any vehicle may be theoretical—that is, calculated from known or implied mechanical properties—or obtained via testing under controlled conditions. The discussion herein covers the term's usage in mechanical applications in which the final stage of the power transmission system is one or more wheels in frictional contact with a railroad track.

"Continuous traction" redirects here. For the vehicle propulsion system, see Continuous track.
This article is about applications in vehicles. For the general concept, see Traction (engineering).
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