Making use of all the research carried out, up to the present, into the automation of marshalling yards, the author sets out to define the arrangements ensuring their automatic operating without any accident or human intervention. He considers the problem of automatic route formation in accordance with a programme to have been already resolved, and recapitulates the studies already carried out concerning the space-time function of the movement of wagons, as well as the parameters on which that function depends -- the running of the wagons, curves, points and crossings, air resistance, the uncertain differences in speed when leaving the retarder and in the composition of the cuts, and the authorised speeds of impact. He then describes and discusses some of the solutions which have been proposed, or tested, in order to resolve the problem, and finally arrives at the system which he referes to as the 2-Delt V method. He examines it at length, and gives a detailed explanation of the Siemens algorithm of the operation of a variation of this method, providing for primary and secondary retarders, and ASEA spiral retarders. Finally, he deals with another variation, providing for a haulage truck at the exit from the secondary retarders, and he shows the algorithm. The article contains the plans of two marshalling yards equipped with these systems, together with a brief description, in an appendix, of the Dowty system used in the English station of Tinsley.

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 477-524
  • Serial:
    • Volume: 6
    • Issue Number: 12

Subject/Index Terms

Filing Info

  • Accession Number: 00072967
  • Record Type: Publication
  • Source Agency: Association of American Railroads
  • Files: TRIS
  • Created Date: Jan 29 1976 12:00AM