APPLICATION OF THE AUTOMATIC COUPLER TO CARRIAGES. STRENGTH TESTS ON PASSENGER COACHES SUITABLE FOR RECEIVING THE AUTOMATIC TRACTION AND SHOCK COUPLER

The present report describes the tests, carried out from 1964 to 1966 on 5 RIC passenger coaches belonging to the DB, FS, CFF, SNCB and SNCF, to determine their resistance to compressive and tractive forces. The main purpose of these tests was to examine to what extent the body-frame of the passenger coaches could be adapted to the new force distribution resulting from the installation of the automatic traction and shock coupler. The stress measurements were taken in particular in the part of the underframe situated between the headstock and the bogie pivot bolster, i.e. the area more especially affected by the forces arising from the application of the automatic coupler. The results of the strength tests carried out on the 5 passenger coaches very clearly show that the design of a passenger-coach underframe can easily be adapted to enable it to withstand the compressive and tractive forces resulting from the application of the automatic traction and shock coupler. Inasfar as this report may serve as a guide for the application of the automatic coupler on passenger coaches, attention should be drawn to the following 3 points: 1) Two fundamentally different concepts are involved: the DB have chosen for their passenger coaches an arrangement other than that contemplated for their wagons, whereas the other Administrations have retained the same arrangement for both their passenger coaches and their wagons, i.e. the one shown in drawing UIC/FS 49. 2) The tested coaches were constructed between 1964 and 1966 and, consequently, at a time when the automatic coupler was still not so fully defined as at present. The application of the Willison suspension will in particular involve a modification of the headstock. 3) The investigations and tests in progress should show whether the side-buffers, designed to keep the coupler tensioned, will continue to be necessary on the passenger coaches, when the side-buffers on the wagons are dispensed with. This could result in modifications in the mode of application of the compressive forces and, consequently, in the design of the underframe ends.

  • Supplemental Notes:
    • Restrictions on the use of this document are contained in the explanatory material.
  • Corporate Authors:

    International Union of Railways

    Office of Research and Experiments
    Utrecht,   Netherlands 
  • Publication Date: 1968-10

Media Info

  • Features: Appendices;
  • Pagination: 10 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00052988
  • Record Type: Publication
  • Source Agency: International Union of Railways
  • Report/Paper Numbers: B85/RP 1/E
  • Files: TRIS
  • Created Date: Oct 26 1976 12:00AM