曳網中のヨーイングについて-II(日本航海学会第34回講演会)

概要

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In general, it has been observed that the ships motion under towing a trawl-net which supported by "the towing block" on the her stern at starboard side is different from the motion without the net: In this report, the auther has analysed the ships motion, especially about the effect of towing tension on the ships motion in steered condition under a state as mentioned above. And the following tendencies werefoundout: (1) By the effect of towing tension on the ships motion, it is possible to make even dynamically unstable ships directionally stable without steered. (2) Under towing a trawl-net as mentioned above, the ships drift angle when steered the rudder angle is given a meeting rudder with a combination of angular deviation and velocity control, no return to zero. And in the case of that meeting rudder is a proper quantity, the ships track slightly come back to her initial course. (3) The ships drift angle under a state as mentioned above, increase proportionally to the towing tension of the net which supported by the towing block on the same position with uniform towing velocity.
社団法人日本航海学会の論文
1966-07-25