... hydrofoil coefficient configuration marine transportation wetted surface area hull vpp trim parameter vpp model THE 24T H CHESAPEAKE SAILING YACHT SYMPOSIUM ANNAPOLIS, MARYLAND, JUNE 2022 Velocity Prediction Program for a Hydrofoiling Lake Racer Michele Francesco Melis, Hamburg University...

... Rake Differential (RRD) on overall performance, and predicting the optimal wind range for use of the light and heavy weather dagger boards on the AC50 Catamaran. The AC75 SVPP and DVPP were used to analyse the affect of hull shape and the main foils’ fixed angle-of-attack (AOA) on time-to-fight...

... reduces labor, but allows use of sustainable timber resources and sequesters the carbon that the tree took from the atmosphere while growing in a form that hopefully will last for some decades at least. climate change social responsibility longitudinal composite construction hull sustainability...

... for yacht designers and analysts. New methods are discussed to calculate the foil forces within the VPP solution loop for fully- or partly-immersed foils. A variety of non-trivial hydrodynamic issues are addressed, including dynamic hull forces and moments when wetted. A practical approach to surface...

... Hydrodynamics of Three Slender Models Resembling Polynesian Canoe Hulls Richard G.J. Flay, University of Auckland, Auckland, New Zealand Ignazio Maria Viola, Institute for Energy Systems, University of Edinburgh, United Kingdom Geoffrey J. Irwin, University of Auckland, Auckland, New Zealand...

... was investigated by performing experimental test in rough waves on a segmented containership s hull in the 50m×30m×5m hydrodynamic and ocean engineering tank of Ecole Centrale de Nantes. In this context, the main objective of this paper is to evaluate through simplified modelling whether basic structural...

... Conventional transom-hung rudders are often used on small sailboats because of their simplicity compared to rudders mounted under the hull; however, they present substantial performance penalties, including (1) the rudder is more likely to ventilate by drawing air down from the free surface, (2...

... calculation high-speed sailing kanazawa institute jib variation sailing resistance wind speed wetted area solidfromphoto coefficient rudder twa center board thrust spinnaker heel angle olympic games trapeze hull wind angle In order to sail 470 faster, authors consider...

... the variation of their shape under wind flow; and a hydrodynamic one, handling the motion of the hull with its appendages in water. Regarding the first part, sails provide the aerodynamic force necessary for propulsion. But being very thin, they have their shape adapted according to the locally developing...

... Modern racing yacht semi-planing hull forms provide a number of complex challenges for designers and a minefield for those involved in yacht rating. The SYRF Wide Light Project was initiated as a means of providing data with which to assess a range of alternative computation methodologies...

...-scale free-surface flows as found e.g. in naval architecture. This holds especially for the flow around typical modern yacht hulls, often planing, sometimes with surface-piercing appendages. Particular challenges include, but are not limited to, breaking waves, sharpness of interface, numerical...

... and displacement. Response surfaces are generated from a 64 data point array of RANS VOF simulations. upstream oil & gas measured data coefficient sensor hull distortion vpp simulation contour boat speed correction shape stripe standard deviation awa stripe anemometer ran rudder angle...

... of sailing yachts require careful g evaluation of raw tank data and extrapolation to the full Reynolds number for hull scale performance in comparison with commercial ship RT tank testing. Froude scaling has been widely utilized for the RF Reynolds number for keel, bulb and extrapolation of model results...

... design, including a parametric study of hull form as it relates to stability at high angles of heel, the development of bespoke parametric design and analysis tools using the graphical algorithm editor Grasshopper, a towing tank campaign at the Wolfson Unit to investigate the behavior of three keel...

... Measurements of the inertia parameters of a keelboat hull using a bifilar suspension are described. Bifilar yaw moment measurement normally entails accurate measurement of the length l and spacing 2 d of the suspension, and of T y the period of pure yaw oscillation 1 . The primary...

... surface submergence interaction froude number residuary resistance hull coefficient heave post heel resistance bulb position diameter wave pattern resistance cylinder bulb submergence appendage chesapeake sailing yacht symposium THE 20th CHESAPEAKE SAILING YACHT SYMPOSIUM ANNAPOLIS...

... to a round bilged sailing yacht, the Open 60 Imagine—an older Open 60 hull-form by Kaufmann Designs. The effect of transom lift devices was tested on the one-tenth scale model of Imagine in the Robinson Model Basin at Webb Institute. Heel angles of 0, 5, and 10 degrees were investigated at a range of speeds...

... was tested in a conventional configuration at various leeway angles with the foil aligned to the center plane, in a gybing configuration at a series of angles relative to the hull, and in configurations combining hull yaw and gybing angles to simulate realistic performance. Side-force (lift) and resistance...

... and more circular hull International C-Class Catamaran Championship and was cross section. The second was Rocker, the bold hydrofoil victorious in capturing the trophy with five straight wins by catamaran, using hulls from the same mold as Alpha and an Alpha CAN 6 over the venerable Cogito from the USA...

... The practical question raised is to know which kind of solver using finite differences method and RANSE solver answers each code can bring in terms of tendencies using volume of fluid method. The Fluid Mechanics evaluation or sensitivity to hull geometry modifications. Laboratory of the Ecole Centrale de Nantes...