PROBLEMS IN THE EMERGENCY MANOEUVRING OF SUPERCHARGED DIESEL ENGINES DRIVING A FIXED-PITCH PROPELLER

It is expected that, for economic reasons, large cargo ships will continue to be fitted with fixed-pitch propellers. The problem of rapid reversing of a Diesel engine driving a fixed-pitch propeller is still unsolved, however, and the emergency, stopping of such ships is an associated problem. The Author, of MaK Maschinenbau GmbH, discusses methods of reducing head-reach in the emergency stopping of these ships. A brief consideration of automatic remote engine-control, and of hull resistance (including the potential value of flaps and other external braking devices), is followed by a more detailed discussion on the influence of wake on stopping distance and on the effectiveness of the propeller as a brake. The contribution that can be made by engine and shaft brakes is then examined (MaK have had good results, mainly from flywheel brakes, over the past ten years), and the behaviour of the turbocharged Diesel engine during emergency stopping and reversing is discussed in some detail. Experience has shown that, at up to about 80% of the ship's service speed (i.e., up to about 12 to 13 knots), a flywheel or other brake can contribute to good manoeuvrability and is therefore useful in confined waters. For speeds above this, another solution must be found. Order from: BSRA as No. 48,860.

  • Availability:
  • Corporate Authors:

    Seehafen-Verlag Erik Blumenfeld

    Celsiusweg 15, Postfach 1347
    2000 Hamburg 50,   Germany 
  • Authors:
    • Schacht, H J
  • Publication Date: 1978-3

Language

  • German

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00180062
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: Sep 27 1978 12:00AM