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1-15 of 15
Keywords: spinnaker
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Proceedings Papers
Paper presented at the SNAME 23rd Chesapeake Sailing Yacht Symposium, March 15–16, 2019
Paper Number: SNAME-CSYS-2019-009
... of a bi-dimensional section of a spinnaker, will also be presented here for the first time. These results allow to interpret some inconsistent data from past experiments and simulations, and to provide guidance for future model testing and sail design. NOTATION AoA Angle of Attack CFD Computational Fluid...
Proceedings Papers
Paper presented at the SNAME 23rd Chesapeake Sailing Yacht Symposium, March 15–16, 2019
Paper Number: SNAME-CSYS-2019-014
... 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...
Proceedings Papers
Julien Deparday, Patrick Bot, Fréderic Hauville, Benoit Augier, Marc Rabaud, Dario Motta, David Le Pelley
Paper presented at the SNAME 22nd Chesapeake Sailing Yacht Symposium, March 18–19, 2016
Paper Number: SNAME-CSYS-2016-008
... While sailing offwind, the trimmer typically adjusts the downwind sail "on the verge of luffing", letting occasionally the luff of the sail flapping. Due to the unsteadiness of the spinnaker itself, maintaining the luff on the verge of luffing needs continual adjustments. The propulsive force...
Proceedings Papers
Paper presented at the SNAME 21st Chesapeake Sailing Yacht Symposium, March 15–16, 2013
Paper Number: SNAME-CSYS-2013-012
... at 20° starboard tack is to tack just before their paths would cross apparent wind angle, downwind under asymmetric and position itself in the lee-bow position (L) depicted in spinnaker at 60° and downwind under symmetric spinnaker figure 1. In this position it can find positive interference...
Proceedings Papers
Paper presented at the SNAME 21st Chesapeake Sailing Yacht Symposium, March 15–16, 2013
Paper Number: SNAME-CSYS-2013-006
... In this paper the results of wind tunnel tests on two different asymmetric spinnakers are presented. During these tests forces and flying shapes at different apparent wind angles and trims were recorded by 6DoF balance and photogrammetry. As these tests are intended as a validation benchmark...
Proceedings Papers
Paper presented at the SNAME 20th Chesapeake Sailing Yacht Symposium, March 18–19, 2011
Paper Number: SNAME-CSYS-2011-004
... condition was modelled using a Vortex Lattice code, while the downwind wind-tunnel test was modelled using a Navier-Stokes code. The pressures obtained from the three different methods are compared on three horizontal sections of the headsail, mainsail, and asymmetric spinnaker. In general the pressures...
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 19th Chesapeake Sailing Yacht Symposium, March 20–21, 2009
Paper Number: SNAME-CSYS-2009-008
... THE 19th CHESAPEAKE SAILING YACHT SYMPOSIUM ANNAPOLIS, MARYLAND, MARCH 2009 Photogrammetric Investigation of the Flying Shape of Spinnakers in a Twisted Flow Wind Tunnel Kai Graf, Institute of Naval Architecture, University of Applied Sciences Kiel (UAS), Kiel / Germany Olaf Müller, LM Glasfiber...
Proceedings Papers
Paper presented at the SNAME 19th Chesapeake Sailing Yacht Symposium, March 20–21, 2009
Paper Number: SNAME-CSYS-2009-001
... challenges for the designer as well as the flow analyst. In this paper, flow simulations around the fully appended hull at expected very high Froude numbers are shown as well as spinnaker flow simulations taking into account the extraordinary spinnaker design constraints. In addition, the treatment of skiff...
Proceedings Papers
Paper presented at the SNAME 16th Chesapeake Sailing Yacht Symposium, March 3, 2003
Paper Number: SNAME-CSYS-2003-003
... measurements performed on the Technical University of Berlins research sailing yacht. DYNA. with a finite element analysis of her rig. spinnaker load case port yacht rig apparent wind angle starb loading mainsail spreader dyna computation downwind wind speed sailing downwind upwind load...
Proceedings Papers
Paper presented at the SNAME 16th Chesapeake Sailing Yacht Symposium, March 3, 2003
Paper Number: SNAME-CSYS-2003-013
... THE 16th CHESAPEAKE SAILING YACHT SYMPOSIUM ANNAPOLIS, MARYLAND, MARCH 2003 Experimental Force Coefficients for a Parametric Series of Spinnakers William C. Lasher, James R. Sonnenmeier, David R. Forsman, Cheng Zhang and Kenton White, Penn State Erie, The Behrend College, Erie, Pennsylvania, USA...
Proceedings Papers
Paper presented at the SNAME 16th Chesapeake Sailing Yacht Symposium, March 3, 2003
Paper Number: SNAME-CSYS-2003-005
.... Specifically, it has been concluded that large spinnakers are penalized so that a fractional rig, with its small spinnaker, is favored when sailing offwind, that there are un-rated benefits to a masthead rig upwind, and that there are errors in the relative handicapping of overlapping and non-overlapping jibs...
Proceedings Papers
Paper presented at the SNAME 16th Chesapeake Sailing Yacht Symposium, March 3, 2003
Paper Number: SNAME-CSYS-2003-002
... program calculates the deformed sail geometry assembled, they take the shape of a spinnaker. Membrain from the resulting aerodynamic pressure acting on the does not accept 3-D paneled surface description, thus a sails. MemBrain utilizes a user defined surface mesh, where the user has the ability...
Proceedings Papers
Paper presented at the SNAME 15th Chesapeake Sailing Yacht Symposium, January 26, 2001
Paper Number: SNAME-CSYS-2001-010
... hinged centerboard, or GZv righting moment arm at boat speed, V dagger- board, it will also adjust the draft for maximumboat Ua apparent wind at height of CE speed. Am area of main sail Aj area of jib For sloop rigs the program will also take in the jib A. area of spinnaker and set the spinnaker...
Proceedings Papers
Paper presented at the SNAME 15th Chesapeake Sailing Yacht Symposium, January 26, 2001
Paper Number: SNAME-CSYS-2001-015
... The primary purpose of this offwind sail investigation was to better understand the relative performance of symmetric spinnakers flown from conventional poles and asymmetric spinnakers flown from conventional poles or sprits, i.e. poles restricted to the centerline. The specific goal...