THE EFFECT OF BRAKE FLAPS ON STOPPING AND TURNING ABILITY OF A SHIP

As tankers grow larger the SHP/displacement-ratio decreases because the service speed of the tanker usually is nearly the same and therefore independent of the size. This means that the braking effect of the propeller (the astern thrust) during a stopping manoeuvre falls with increasing tanker size. Various investigations have been carried out to find some useful auxiliary braking devices that can shorten the stopping distance of a large tanker. This paper is a contribution to this work and deals with flaps used as braking devices and the effect of flaps on the turning ability. Towing tests and free running tests were carried out with a 220,000 tons dw tanker model equipped with brake flaps. The test programs are given including particulars of the model and the brake flaps and propeller particulars.

• Corporate Authors:

  Ship Research Institute of Norway

  P.O. Box 4125, Valentinlyst, Hakon Hakonsongt. 34
  N-7001 Trondheim,   Norway 
• Authors:
  • Ottesen, E K
• Publication Date: 1973-8

Media Info

• Features: References;
• Pagination: 18 p.

Subject/Index Terms

• TRT Terms: Brake components; Braking; Stopping; Tanker shipping; Tests; Towing devices; Turning traffic
• Old TRIS Terms: Brake flaps; Model testing; Stopping characteristics; Tanker braking systems; Towing tests; Turning characteristics
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00167655
• Record Type: Publication
• Source Agency: Ship Research Institute of Norway
• Report/Paper Numbers: R-15.73
• Files: TRIS
• Created Date: Jan 13 1978 12:00AM