A series of bare-hull resistance and self-propulsion tests were carried out on a 0.125 scale model of a 11.8 m long, waterjet-propelled planing hull in the clear water towing tank at the National Research Council of Canada's Institute of Marine Dynamics. The bare-hull resistance tests, performed with the waterjet inlets closed, spanned a range of eight model velocities and nine ballast conditions consisting of three displacements each with three positions of the longitudinal center of gravity. The hull was then fitted with two model waterjet thrusters and tested over the same speeds and ballast conditions. Dynamic instability, or porpoising, was seen during certain high-speed tests. A discussion of this behavior and its relation to published dynamic stability limits is given.


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    Title :

    Dynamic stability of a high-speed planing boat model


    Additional title:

    Die dynamische Stabilität eines Hochgeschwindigkeits-Schiffplanungsmodelles


    Contributors:
    Thornhill, E. (author) / Veitch, B. (author) / Bose, N. (author)

    Published in:

    Publication date :

    2000


    Size :

    7 Seiten, 19 Bilder, 1 Tabelle, 15 Quellen



    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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