THE STOPPING OF LARGE TANKERS AND THE FEASIBILITY OF USING AUXILIARY BRAKING DEVICES

The very rapid increase in the size of tankers, accompanied by a significant decrease in the ratio of installed power per ton of displacement, has emphasized the need to examine the stopping ability of this type of ship. Part I of the paper puts forward a method of calculating stopping distances which appear to be satisfactory when compared with the limited data at present available. This is on the basis of braking using the available astern thrust of the propeller. Part II examines the use of auxiliary devices to reduce the stopping distance of a ship with particular reference to a 165,000-ton d.w. tanker in the loaded condition. A very large increase in resistance would have to be generated by an auxiliary device to bring about a significant improvement. It is concluded that it would be impractical to consider reducing the stopping distance of a large tanker by more than about 30 percent. The higher astern thrust that can be developed by a ship fitted with Diesel machinery, compared to steam turbine, has a significant effect on stopping distance particularly for very large tankers.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/03060209
• Corporate Authors:

  Royal Institution of Naval Architects

  10 Upper Belgrave Street
  ,   United States 
• Authors:
  • Clarke, D
  • Wellman, F
• Publication Date: 1971-4

Media Info

• Features: References;
• Pagination: p. 139-166
• Serial:
  • Naval Architect
  • ISSN: 0306-0209

Subject/Index Terms

• TRT Terms: Auxiliary brakes; Brake components; Braking; Stopping; Tanker shipping; Thrust reversers
• Uncontrolled Terms: Parachutes
• Old TRIS Terms: Auxiliary braking devices; Brake flaps; Reverse propulsion; Stopping characteristics; Tanker braking systems
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00046665
• Record Type: Publication
• Source Agency: Royal Institution of Naval Architects
• Files: TRIS
• Created Date: Sep 18 1973 12:00AM