Sponsored by Japan Marine Machinery Development Association, Nippon Kokan K. K. has been working for more than two years on the development of a commercial sailing-ship. As part of this work, NKK's experimental ship Daioh (a 1:15 scale model of a ULCC) was fitted with three sets of sails for trials, and these were carried out mostly under engine and sail combined but also under sail alone. The sails were also model-tested in NKK's wind tunnel. After discussing the aims of this research, which includes the development of bulk carriers in the 10,000 to 35,000 dwt range with a speed of 10-15 knots, the Authors give an account of the wind-tunnel tests and the sea trials. It is concluded, in particular, that (i) the use of sails for auxiliary propulsion, and not as main propulsion, seems to be the most feasible solution, (ii) laminar-flow rigid sails would give an efficient performance, and (iii) progress has been made towards the automation and mechanisation of the sail equipment. Though the project is not at present economically advantageous, successful commercial application should be possible before long.

  • Supplemental Notes:
    • This paper was presented at the 19th Sesiones Tecnicas de Ingenieria Naval, held at La Manga del Mar Menor, in May 1980.
  • Corporate Authors:

    Asociacion de Ingenieros Navales

    Apdo Correos 457
    Madrid,   Spain 
  • Authors:
    • SHIMIZU, K
    • Endo, Y
  • Publication Date: 1980

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Filing Info

  • Accession Number: 00329870
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: Mar 12 1981 12:00AM