THE "TURN BACK": A NEW AND IMPORTANT STEERING PARAMETER IN THE STANDARD MANOEUVRING TESTS

After discussing the capabilities of the Kempf zig-zag test, together with some published material which facilitates the analysis of the test the Authors, of the HSVA (Hamburg), introduce an additional parameter for these tests. This parameter, known as "turn-back", is the time that elapses between the start of a course reversal and the ship's head passing through the mean course line during a zig-zag test. In a number of recent cases an anomaly has been observed in this parameter, with "turn-back' time being longer than anticipated. This figure is now being included in the results of HSVA manoeuvring tests. Diagrams compiled from HSVA data for five categories of ships are included, giving dimensionless times (plotted against Froude number) for the "turn back". They supplement HSVA's previously-published data on manoeuvring and form a basis for comparing and assessing the results of model or full-scale tests. Order from: BSRA as No. 47,482.

• Corporate Authors:

  Schroedter (C) and Company

  Stubbenhuk 10
  Hamburg 11,   Germany 
• Authors:
  • Brix, J
  • Anders, M
• Publication Date: 1977-6

Language

• German

Media Info

• Features: References;
• Pagination: 3 p.
• Serial:
  • HANSA
  • Volume: 114
  • Issue Number: 12
  • Publisher: Deutsche Bahn AG

Subject/Index Terms

• TRT Terms: Maneuvering; Steering; Zig zag tests
• Old TRIS Terms: Steering characteristics
• Subject Areas: Marine Transportation; Safety and Human Factors; Vehicles and Equipment;

Filing Info

• Accession Number: 00172137
• Record Type: Publication
• Source Agency: British Ship Research Association
• Files: TRIS
• Created Date: Mar 14 1978 12:00AM