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Keywords: boat speed
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Proceedings Papers

Paper presented at the SNAME 23rd Chesapeake Sailing Yacht Symposium, March 15–16, 2019
Paper Number: SNAME-CSYS-2019-003
... and performance evaluation process for sailing yachts. heave aerodynamic force model test simulation symposium gerritsma foil head sea mast boat speed proceedings variation configuration wave height sailing yacht characteristic resistance calm water wolfson unit The Un-restrained...
Proceedings Papers

Paper presented at the SNAME 23rd Chesapeake Sailing Yacht Symposium, March 15–16, 2019
Paper Number: SNAME-CSYS-2019-008
... high performance yacht design conference annapolis sailing yacht numerical tool nante modeling boat speed coefficient evolution reservoir simulation THE 23RD CHESAPEAKE SAILING YACHT SYMPOSIUM ANNAPOLIS, MARYLAND, MARCH 2019 6DOF behavior of an offshore racing trimaran in an unsteady...
Proceedings Papers

Paper presented at the SNAME 23rd Chesapeake Sailing Yacht Symposium, March 15–16, 2019
Paper Number: SNAME-CSYS-2019-012
... Two boats sailing in close proximity may inevitably compare their boat speeds, perhaps even "race" each other. Over the last few centuries there have been numerous handicap systems designed to equalize the competitive chances of racing sailboats. Corollary to handicapping is another arcane art...
Proceedings Papers

Paper presented at the SNAME 22nd Chesapeake Sailing Yacht Symposium, March 18–19, 2016
Paper Number: SNAME-CSYS-2016-002
... force model, a hydrodynamic force model and an algorithm to balance the forces. The force balance routine uses four degrees of freedom; boat speed, yaw, heel and rudder angle to balance the aerodynamic and hydrodynamic forces for a given true wind speed and angle. The force models are derived from RANS...
Proceedings Papers

Paper presented at the SNAME 22nd Chesapeake Sailing Yacht Symposium, March 18–19, 2016
Paper Number: SNAME-CSYS-2016-001
... methods are combined in a velocity prediction program featuring a constraint optimization method in order to predict boat speed and wing and foil trimming parameters for its maximization. A velocity polar calculated by applying this method to a 50-foot catamaran is shown and the result of some studies...
Proceedings Papers

Paper presented at the SNAME 21st Chesapeake Sailing Yacht Symposium, March 15–16, 2013
Paper Number: SNAME-CSYS-2013-004
... approach and shows that a solution, based on UKF filters, provides a relevant method to cope with accuracy and stability in case of sensor data outage. empirical formula displacement wind measurement computation boat motion formula vector matrix wind speed compute boat speed sensor wind...
Proceedings Papers

Paper presented at the SNAME 21st Chesapeake Sailing Yacht Symposium, March 15–16, 2013
Paper Number: SNAME-CSYS-2013-011
... set of nautical instruments (wind, boat speed and heading, position) as well as dynamic sensors measuring the motion of the dinghy with additional audio and video streams for crew observations. Most sensors are integrated in a small lightweight housing also containing a main processing unit...
Proceedings Papers

Paper presented at the SNAME 20th Chesapeake Sailing Yacht Symposium, March 18–19, 2011
Paper Number: SNAME-CSYS-2011-008
... picture of aerodynamic performance over a full range of conditions in a rapid and cost-effective manner. The use of a Real-Time VPP and a sail shape recognition system combine to enhance the accuracy and repeatability of testing. The influence of examining boat speed instead of driving force...
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-2011-014
.... Topics considered in this paper include speed prediction, calculation models for folding propellers, and cavitation criteria. calculation tip speed boat speed sailboat efficiency criteria blade pressure coefficient cavitation folding propeller evaluation propeller formula resistance...
Proceedings Papers

Paper presented at the SNAME 19th Chesapeake Sailing Yacht Symposium, March 20–21, 2009
Paper Number: SNAME-CSYS-2009-001
...-like performance of the yacht in a VPP is investigated. reservoir simulation single rudder constraint spinnaker rudder investigation ac90 yacht froude number variant 3 appendage configuration ruder twin rudder yacht prediction boat speed consequence rudder configuration wind...
Proceedings Papers

Paper presented at the SNAME 18th Chesapeake Sailing Yacht Symposium, March 2–3, 2007
Paper Number: SNAME-CSYS-2007-006
... code korpus boat speed application awa sail shape ran sail trim design 2 ran simulation america separation state variable THE 18th CHESAPEAKE SAILING YACHT SYMPOSIUM ANNAPOLIS, MARYLAND, MARCH 2007 Performance Prediction without Empiricism: A RANS-Based VPP and Design Optimization...
Proceedings Papers

Paper presented at the SNAME 17th Chesapeake Sailing Yacht Symposium, March 4–5, 2005
Paper Number: SNAME-CSYS-2005-005
... examples are shown: a study of the impact of the ACC V4/V5 rule changes and a comparison of a canting keel and a conventional keel yacht. artificial intelligence efficiency boat speed tank test result ballast keel resistance coefficient keel configuration force coefficient test run...
Proceedings Papers

Paper presented at the SNAME 16th Chesapeake Sailing Yacht Symposium, March 3, 2003
Paper Number: SNAME-CSYS-2003-008
... wind mast prediction algorithm land yacht fuselage iron duck top speed boat speed configuration sailing wind speed yacht wood duck iceboat square foot wing greater difficulty light wind THE 16th CHESAPEAKE SAILING YACHT SYMPOSIUM ANNAPOLIS, MARYLAND, MARCH 2003 Sailing Yacht Design...
Proceedings Papers

Paper presented at the SNAME 15th Chesapeake Sailing Yacht Symposium, January 26, 2001
Paper Number: SNAME-CSYS-2001-010
..., PCSAIL, may be made with equations and other information provided in the Appendix. The Excel "Solver" has been found to be a reliable means of finding the equilibrium boat speed and heel angle. It seeks the maximum boat speed by adjusting the sail flattening factor, F, and reef, R, and the lateral...
Proceedings Papers

Paper presented at the SNAME 13th Chesapeake Sailing Yacht Symposium, January 24–25, 1997
Paper Number: SNAME-CSYS-1997-002
..., such as the boat speed, heel angle, wind speed, wind angle, and so on, were also measured. Sail shapes of the boat in the up-wind condition were also measured with the use of CCD cameras installed in the boat. The sail shape images taken by the cameras were transformed to bit-map files, and then processed...
Proceedings Papers

Paper presented at the SNAME 11th Chesapeake Sailing Yacht Symposium, January 28–30, 1993
Paper Number: SNAME-CSYS-1993-007
.... sname-csys-1993-007 test program tank pact model testing boat speed america davidson partnership designer new york - THE ELEVENTH CHESAPEAKE SAILING YACHT SYMPOSIUM Refinements in the Techniques of Tank Testing Sailing Yachts and the Processing of Test Data James R. Teeters, Sparkman...
Proceedings Papers

Paper presented at the SNAME 8th Chesapeake Sailing Yacht Symposium, March 7, 1987
Paper Number: SNAME-CSYS-1987-001
... understand­ing of the VPP to many sailors so that they can take advantage of the technology in their normal activities. apparent wind prediction application sailing weather yacht vpp measurement system wind angle boat wind velocity information boat speed certificate sailor knot helmsman...
Proceedings Papers

Paper presented at the SNAME 7th Chesapeake Sailing Yacht Symposium, January 19, 1985
Paper Number: SNAME-CSYS-1985-004
... A discussion of some concepts that apply to the development of small high speed sailing craft in general and to sailboards in particular and an analysis of the design and performance of ordinary, everyday sailboards as well as high speed ones. apparent wind mass density boat speed...
Proceedings Papers

Paper presented at the SNAME 5th Chesapeake Sailing Yacht Symposium, January 17, 1981
Paper Number: SNAME-CSYS-1981-002
...-based marine instruments have increased in capability and popularity. This paper describes some current developments in electronics to evaluate the performance of sailing yachts, ranging from basic digital displays to full-blown shoreside computers. boat speed sailor apparent wind angle...

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