... limitations. frequency variation leeway angle force area the foil asymptotic behavior dynamic coefficient pitch 2 water surface coordinate system simulation time step nacra 17 force signal heave motion fluid dynamics different frequency coefficient amplitude mass coefficient equation...

... ABSTRACT Towing tank tests were carried out on three slender models in the Towing Tank at Newcastle University at fixed sink and trim in order to obtain more information on the hydrodynamics of such shapes, and in particular, how the shapes could generate side force when operating at a leeway angle...

... of an A-Class catamaran is simulated by using the RANSE software FineMarine with its volume of fluid method. The C-shaped hydrofoil is analysed for one speed at Froude Number 7.9 and various angles of attack (AoA). The rake was defined and a leeway angle was applied to simulate realistic set ups...

... of attack. Due to the large number of tests required to cover the practical (1) heel and leeway angles in addition to the speed variations in upright tests, it is a time consuming process. However However scaling of sailing yacht model test results towing tank testing is still the most reliable method...

... 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...

... force sysser 27 mean cl phi expression side force rudder calculation hull sysser 33 side force production coefficient aspect ratio method dsyh polynomial keel upright condition leeway angle formulation THE 19th CHESAPEAKE SAILING YACHT SYMPOSIUM ANNAPOLIS, MARYLAND, MARCH 2009 A new...

... to account for the effect of the keel on part of the side force is produced by the the rudder a correction of the effective angle of appendages, in particular for boats with average attack on the rudder of 50% of the leeway angle to high aspect ratio keels and rudders. In was suggested by Gerritsma as well...

... for an America’s Cup yacht. keelfin contribution test program configuration stimulation winglet leeway angle flap 5 transition main appendage glmwt correction appendage configuration reynolds number yacht wind tunnel appendage pact 95 tunnel america THE 17th CHESAPEAKE SAILING YACHT...

... cross sectional depth (1971) and K.Nomoto (1979). The outcome of this - leeway angle modified procedure is compared with the experimental CLR - center of lateral resistance results obtained both within the DSYHS and the Delft Cm - midship section coefficient Systematic Keel Series (DSKS). In the DSYHS...

... system Japanese sailing traders in the 18th to the mid- 19th century an effective attack angle of rudder which have different appearance and construction from leeway angle those of Western tall ships. ,8 decreasing ratio of inflow angle for rudder )'n displacement of ship The present paper shows...

... of the yacht. In this way a solution is found for the three main unknowns in performance prediction, viz: boat speed, leeway angle and heel angle. The impact of helm angle on performance is herein ignored. In the velocity prediction program developed by Van Oossanen & Associates, a fourth equilibrium...

... the hydrodynamic characteristics of a foil at moderate-to-high leeway angles is studied. water management thickness laminar flow sailing-yacht keel sweep angle characteristic drillstring design transition low viscous drag chord location free-stream velocity reynolds number amplitude keel design...

..., Webb Institute of Naval Architecture, Glen Cove, NY. ABSTRACT CLR center of lateral resistance percent of Lwl aft forward end of Lwl This study develops a simplified comparative procedure for use in preliminary yacht design centerline to predict Equilibrium sideforce, resistance, leeway angle and speed...

... and moments operating on the deepest keel and the two keels of constant draft. keel plane suite 1369 ratio keel ship yacht leeway angle world trade center constant draft hull aspect ratio equilibrium leeway angle knot true wind naval architect new york 47 THE SOCIETY OF NAVAL...

... and recommendations are made as to the type of general­ized hull and sail data which are required to improve this basically simple static analysis. yacht stability aspect ratio keel tank test effectiveness hull leeway angle directional stability sail plan side force rudder coefficient water surface...