ON UNUSUAL PHENOMENA IN MANOEUVRING MOTIONS OF A FULL SHIP

In this paper unusual phenomena in manoeuvring quality of full ships which are characterized by unusual course stability in small rudder angles are treated in relation to the unstable phenomena in propulsion tests. Manoeuvring tests as well as propulsion tests were conducted on a model which is liable to both phenomena. Effect of fins near the water surface was also investigated which were designed to prevent the downward stream and intermittent air entrainment before the propeller. Results were found showing an interrelation between both phenomena. (1) Unusual turning moment in manoeuvring motions is considered to be due to lateral force accompanied with unstable phenomena. (2) Both unusual phenomena and unstable phenomena are induced by action of propeller. (3) By fitting appropriate stern fins, unusual phenomena and unstable phenomena can be suppressed.

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    Society of Naval Architects of Japan

    15-16, Toranomon, 1-chome, Minato-ku
    Tokyo,   Japan 

    Society of Naval Architects of Japan

    15-16, Toranomon, 1-chome, Minato-ku
    Tokyo,   Japan 
  • Authors:
    • Togano, H
  • Publication Date: 1975

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Filing Info

  • Accession Number: 00323702
  • Record Type: Publication
  • Source Agency: Stevens Institute of Technology
  • Files: TRIS
  • Created Date: May 21 1981 12:00AM