Frame locomotive

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The electric locomotive series E 18 was still designed as a frame locomotive with four sets of driving wheels fixed in the main frame. (Construction drawing)

A frame locomotive is a locomotive in which all Treibachs - wheelsets are mounted directly in a common main frame. The term is often used to differentiate frame locomotives from bogie locomotives .

The vast majority of steam locomotives were built as frame locomotives. The routing of the steam lines to the engines firmly attached to the frame was easy to solve. Articulated locomotives (steam locomotives with motor bogies) such as B. the types Meyer , Fairlie or Single Fairlie remained rare.

The first electric locomotives with higher outputs were often designed as frame locomotives based on the model of steam locomotives. The drive motors, which were large and heavy at the time, were firmly mounted in the frame. Running axles were mostly used to support the heavy weight and improve cornering .

Since the 1950s, only smaller two- and three-axle electric and diesel locomotives have been designed as frame locomotives. The large frame locomotives were replaced by the bogie locomotives without running axles.

Individual evidence

  1. ↑ For example, in: Implementing provisions for the Railway Ordinance (AB-EBV) DETEC , July 1, 2016 (PDF; 3 MB). AB 54.2.a.1 Rack  railway vehicles, coupled vehicles

literature

  • Žarko Filipović: Electric railways: basics, locomotives, power supply; 2005, Springer-Verlag GmbH. ISBN 3-540-21310-4 .
  • Hans-Peter Bärtschi: Electric locomotives from Swiss factories. In: Verkehrshaus der Schweiz (Ed.): Coal, electricity and rails: The railroad conquers Switzerland. Verlag NZZ, Zurich 1998, ISBN 3-85823-715-9 .