Nippon Kokan(NKK) predicts it will have the world's first sail-assisted tanker in operation within a few years. To this end, the Japan Marine Machinery Development Association has given NKK U.S. $60,000 to perform feasibility studies, including refitting of the 3,200-on tanker Aitaku Maru with a pair of sails as the first computer-age sail-equipped tanker in service. Feasibility studies completed by MKK thus far include sea tests with the 77-ton Daioh, equipped with three types of sails. The Daioh research, also sponsored by Japan Marine Machinery Development Association, is aimed at developing sail-equipped motor ships. Auxiliary sails have resulted in fuel savings of more than 10 percent, NKK reports. Basic data for developing sail-equipped motor ships was collected via wind tunnel and onshore experiments, with sea trials carried out in May-July 1979 with the test ship and all three types of sails. According to test data, fair winds of up to 32 mph from a 90-degree heading would permit the crew to cut engines on a 20,000-dwt ship and maintain a 15-knot speed--or with propulsion equivalent to 7,480 hp on a conventional ship. The article also contains an outline of the research program, including the feasibility study and findings. Five separate tables: provide information on sail design, power gain/loss, and the economics of the advantages and disadvantages of the design.

  • Corporate Authors:

    Gulf Publishing Company

    Box 2608
    Houston, TX  United States  77001
  • Publication Date: 1980-2

Media Info

  • Pagination: p. 103
  • Serial:
    • Ocean Industry
    • Volume: 15
    • Issue Number: 2
    • Publisher: Gulf Publishing Company

Subject/Index Terms

Filing Info

  • Accession Number: 00309437
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 22 1980 12:00AM