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Keywords: yacht
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Proceedings Papers

Paper presented at the SNAME 23rd Chesapeake Sailing Yacht Symposium, March 15–16, 2019
Paper Number: SNAME-CSYS-2019-006
... The increasing number of foiling yachts in offshore and inshore races has driven engineers and researchers to significantly improve the current modelling methods to face new design challenges such as flight analysis and control (Heppel, 2015). Following the publication of the AC75 Class Rules...
Proceedings Papers

Paper presented at the SNAME 23rd Chesapeake Sailing Yacht Symposium, March 15–16, 2019
Paper Number: SNAME-CSYS-2019-008
... to these foils. The quest for performance also demands a better account of the unsteadiness of the environment in which the offshore yachts evolve. Time-domain analysis and system-based modeling allow for an improved understanding of the controllability and dynamic stability of given geometries, enabling...
Proceedings Papers

Paper presented at the SNAME 23rd Chesapeake Sailing Yacht Symposium, March 15–16, 2019
Paper Number: SNAME-CSYS-2019-015
...' catamaran is featured. calculation airflow sailing performance consideration configuration catamaran design superstructure recreational catamaran sailing catamaran water part saloon designer displacement demihull transverse yacht requirement catamaran accommodation headroom...
Proceedings Papers

Paper presented at the SNAME 22nd Chesapeake Sailing Yacht Symposium, March 18–19, 2016
Paper Number: SNAME-CSYS-2016-010
... In order to create capability for analyzing course instabilities of sailing yachts in waves, the authors are at an advanced stage of development of a mathematical model comprised of two major components: an aerodynamic, focused on the calculation of the forces on the sails, taking into account...
Proceedings Papers

Paper presented at the SNAME 22nd Chesapeake Sailing Yacht Symposium, March 18–19, 2016
Paper Number: SNAME-CSYS-2016-013
...-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...
Proceedings Papers

Paper presented at the SNAME 22nd Chesapeake Sailing Yacht Symposium, March 18–19, 2016
Paper Number: SNAME-CSYS-2016-014
... This paper describes insights into keel and rigging loads obtained through a data acquisition system fitted on the fleet of Volvo 65 yachts during the 2014-2015 Volvo Ocean Race. In the first part keel fin stress spectra are derived from traces of canting keel ram pressures and keel angle...
Proceedings Papers

Paper presented at the SNAME 22nd Chesapeake Sailing Yacht Symposium, March 18–19, 2016
Paper Number: SNAME-CSYS-2016-015
...-domain dynamic velocity prediction program (DVPP). The results are demonstrated using a single handed Laser and demonstrate an acceptable level of accuracy. centreline body segment loading artificial intelligence yacht sailor machine learning capture system spenkuch turnock performance...
Proceedings Papers

Paper presented at the SNAME 22nd Chesapeake Sailing Yacht Symposium, March 18–19, 2016
Paper Number: SNAME-CSYS-2016-016
... Yacht races are won by good sailors racing fast boats. A good skipper takes decisions at key moments of the race based on the anticipated wind behavior and on his position on the racing area and with respect to the competitors. His aim is generally to complete the race before all his opponents...
Proceedings Papers

Paper presented at the SNAME 22nd Chesapeake Sailing Yacht Symposium, March 18–19, 2016
Paper Number: SNAME-CSYS-2016-017
... Star-class racing yacht with a crew of two. The data collection consisted of observations, interviews, and video recordings. The results were also verified with the crews to catch biases in the analysis process. A jibe, a specific but common maneuver was analyzed from the perspective of Common Ground...
Proceedings Papers

Paper presented at the SNAME 21st Chesapeake Sailing Yacht Symposium, March 15–16, 2013
Paper Number: SNAME-CSYS-2013-002
... to represent sailing yacht dynamics has not been made. A non-linear simulation of a 10m racer/cruiser racer and full-scale data collected aboard a 23 ft day-sailer are used in conjunction with the one-shot least squares estimation algorithm to evaluate this possibility. Using the non-linear simulation data...
Proceedings Papers

Paper presented at the SNAME 21st Chesapeake Sailing Yacht Symposium, March 15–16, 2013
Paper Number: SNAME-CSYS-2013-012
... The interference between two yachts sailing in several conditions is investigated in the wind tunnel by using two similar yacht models, one of which is mounted on a force balance and the other moved around the test section. The yachts were configured to sail close-hauled upwind at 20° apparent...
Proceedings Papers

Paper presented at the SNAME 21st Chesapeake Sailing Yacht Symposium, March 15–16, 2013
Paper Number: SNAME-CSYS-2013-013
... For the 2014-15 Volvo Ocean Race, the organizing authority made a dramatic shift in direction for the next two editions of the race opting to move to a smaller, less expensive yacht built to exceptionally strict one design standards. This paper outlines some of the motivations for this shift...
Proceedings Papers

Paper presented at the SNAME 20th Chesapeake Sailing Yacht Symposium, March 18–19, 2011
Paper Number: SNAME-CSYS-2011-010
... The design of sailboat rigging influences the yacht’s performance through the change in vertical center of gravity, windage, and ability to control the shape of the rig. In the past, designers have attempted to minimize this drag through the use of streamlined shapes, because it is well known...
Proceedings Papers

Paper presented at the SNAME 20th Chesapeake Sailing Yacht Symposium, March 18–19, 2011
Paper Number: SNAME-CSYS-2011-008
... Wind tunnel testing to determine yacht performance has been carried out for at least the last 50 years. A common perception is that experimental methods do not improve significantly over time. This paper shows how modern wind tunnel testing is still the only realistic way of providing a complete...
Proceedings Papers

Paper presented at the SNAME 20th Chesapeake Sailing Yacht Symposium, March 18–19, 2011
Paper Number: SNAME-CSYS-2011-007
... One of the most important tools in today’s sailing yacht design is the Velocity Prediction Program (VPP). VPPs calculate boat speed from the equilibrium of aero and hydrodynamic flow forces. Consequently their accuracy is linked to the accuracy of the aero- and hydrodynamic data used...
Proceedings Papers

Paper presented at the SNAME 20th Chesapeake Sailing Yacht Symposium, March 18–19, 2011
Paper Number: SNAME-CSYS-2011-003
... This paper describes model and full scale measurements of the flying shape of spinnakers that have been developed for a 38’ c/r yacht. The flying shape measurement principle was based on photogrammetry. Motivation behind this study was to investigate and compare the flying shape as obtained...
Proceedings Papers

Paper presented at the SNAME 20th Chesapeake Sailing Yacht Symposium, March 18–19, 2011
Paper Number: SNAME-CSYS-2011-012
... 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...
Proceedings Papers

Paper presented at the SNAME 19th Chesapeake Sailing Yacht Symposium, March 20–21, 2009
Paper Number: SNAME-CSYS-2009-005
... will be performed. Than, a statistical analysis of the influencing quantities will be applied, identifying a suitable set of design parameters, and their effect on the performances of a sailing yacht. machine learning resistance yacht upright condition dataset total resistance residuary resistance...
Proceedings Papers

Paper presented at the SNAME 19th Chesapeake Sailing Yacht Symposium, March 20–21, 2009
Paper Number: SNAME-CSYS-2009-008
... are investigated and examined. spinnaker wind tunnel test coefficient wind tunnel frequency yacht apparent wind speed dynamic condition apparent wind angle experiment pitch amplitude wind speed artificial intelligence design shape frequency range aerodynamic force THE 19th CHESAPEAKE...
Proceedings Papers

Paper presented at the SNAME 19th Chesapeake Sailing Yacht Symposium, March 20–21, 2009
Paper Number: SNAME-CSYS-2009-009
... The aerodynamic behaviour of a 48’ yacht rig 3D scale model was characterized by means of wind tunnel tests. The experimental campaign, performed in the Politecnico di Milano Twisted Flow Wind Tunnel, allowed to characterize the aerodynamic forces using forced motion tests and to study...

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