In ship-stopping manoeuvres, there can be difficulties in the reversing of four-stroke medium-speed Diesel engines of high m.e.p. that drive fixed-pitch propellers of high pitch/diameter ratio. The Author presents a study, carried out in co-operation with the M.A.N. company, on this problem. It is found that the reversing of such a propeller requires a large turning moment to be produced by the starting air. Delays in opening starting valves must be avoided by direct control of the valves, and delivery of the air should incure only the mimimum of loss. Meeting these requirements adequately should enable the engine to be reversed in a shorter time than has been possible hitherto, and stopping distance can thereby be reduced by about 20%. A further reduction of 20% is obtainable by using a shaft brake or a decompression device. The study is presented in some detail, and the application of the conclusions reached is illustrated in a numerical example for the case of a cargo ship having a fixed-pitch propeller with a P/D ratio of 0.932. Order from BSRA as No. 54,612.

  • Corporate Authors:

    Schroedter (C) and Company

    Stubbenhuk 10
    Hamburg 11,   Germany 
  • Authors:
    • Grossmann, G
  • Publication Date: 1980


  • German

Media Info

  • Features: References;
  • Pagination: p. 1318
  • Serial:
    • HANSA
    • Volume: 117
    • Issue Number: 18
    • Publisher: Deutsche Bahn AG

Subject/Index Terms

Filing Info

  • Accession Number: 00329878
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: Mar 12 1981 12:00AM