In this paper an overview is presented of the state-of-the-art of predicting the speed of sailing yachts. After explaining the importance of this topic in the design and racing of sailing yachts, the basic hydrodynamic and aerodynamic forces and their inter-dependence, which ultimately determine the speed potential at the various points of sail, are described. The different possibilities of determining these forces, together with their centers of effort, is the principal subject of this paper. The use of model testing techniques and associated data reduction methods for the determination of the various hydrodynamic forces are first of all dealt with. Details od how these model tests are best carried out are given. A method is defined with which it is possible to divide the total measured hydrodynamic resistance into its six basic components. Extrapolation of model test results to arrive at full-scale values, and the use thereof for speed prediction, are described. A major part of the paper is associated with the state-of-the-art of calculating sailing yacht performance as this is performed in semi-empirical models or so-called velocity prediction programs (VPP's). Each of the elements involved are considered, e.g. the side forces on hull and appendages, induced resistance, viscous and wave resistance, the resistance due to heel, the added resistance due to waves, ect.


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    Title :

    Predicting the speed of sailing yachts


    Additional title:

    Vorausbestimmung der Geschwindigkeit von Segelyachten


    Contributors:


    Publication date :

    1993


    Size :

    61 Seiten, 26 Bilder, 11 Tabellen, 73 Quellen


    Remarks:

    Anhänge)



    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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    The Design of sailing yachts ^[,engl.]

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