In a previous report, the authors investigated the effects of wind on ship manoeuvrability in the range of the wind speed for the ship speed which is not very large. In the investigation, they obtained the formulae by which the angle between the wind direction and a drifting direction of a turning ship, and the drifting distance while a ship turns during 360 degrees can be calculated. They also showed the wind speed for the ship speed when the drifting distance and the quantity of the variation of the advance reach L/6 (nearly same as a ship breadth) and the relation between the wind speed for the ship speed and the ratio of the rudder area to the side projected area above the water line. In this report, the effects of wind in the range of the wind speed for the ship speed where the ship is unmanoeuvrable were calculated by use of the forces and moments acting on a ship in wind and oblique flow, measured by Tsuji and others, Fujii's rudder force formula, and the rotary derivatives of one of the authors. As a result, the speed, drift angle, drifting direction, the locus and the course stability of a ship drifting obliquely in uniform wind are shown.

  • Corporate Authors:

    Kyushu Univ, Research Inst for Appl Mech

    87 Hakozaki Machi, Higashi-ku
    Fukuoka 812,   Japan 
  • Authors:
    • Inoue, S
    • Ishibashi, Y
  • Publication Date: 1973-2

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Filing Info

  • Accession Number: 00084488
  • Record Type: Publication
  • Source Agency: Japan Shipbuilding Industry Foundation Library
  • Files: TRIS
  • Created Date: May 7 1975 12:00AM