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PROSE Ltd. designed the trailer bogies with a track gauge changing feature for the Montreux- Berner Oberland - Bahn (MOB)

The Compagnie du Chemin de fer Montreux Oberland Bernois (MOB) commissioned PROSE Ltd in September 2008 with the design of trailer bogies with a track gauge changing feature.

The basis for PROSE's task was a basic concept with the functional principle elaborated by the operator MOB. PROSE Ltd. revised, optimised and completed the preliminary design by means of design studies, stress analysis and running dynamic simulation. This resulted in a final design with manufacturing drawings.

The innovative principle for changing the track gauge, i.e. the lateral movement of the two bogie half frames from meter gauge to standard gauge and vice versa, was analysed be means of computerised kinematic simulation and dynamic calculations. These results were the inputs for the design of the bogie and of the track gauge changing facility. MOB disposes now, apart of the two prototype-bogies, of an operative track gauge changing facility on which functional and endurance tests can be performed. The facility is currently installed at the premises of MOB in Montreux but it will be later relocated to Zweisimmen.

PROSE Ltd. achieved a further milestone in its key competence in bogie design by the successful completion of this development project for the track gauge changing bogie for MOB.

PROSE Ltd. is an engineering company in the field of railway rolling stock with about 40 employees, performing running dynamics and structural analysis, designing refit projects, performs vehicle testing as accredited testing laboratory and consults in the field of noise reduction, procurement management and maintenance optimisation.

Click here for a video of track gauge changing (M4V, 30MB)