Performance Prediction for Sailing Dinghies Prof Alexander H Day
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Aerodynamics of High-Performance Wing Sails
Aerodynamics of High-Performance Wing Sails J. otto Scherer^ Some of tfie primary requirements for tiie design of wing sails are discussed. In particular, ttie requirements for maximizing thrust when sailing to windward and tacking downwind are presented. The results of water channel tests on six sail section shapes are also presented. These test results Include the data for the double-slotted flapped wing sail designed by David Hubbard for A. F. Dl Mauro's lYRU "C" class catamaran Patient Lady II. Introduction The propulsion system is probably the single most neglect ed area of yacht design. The conventional triangular "soft" sails, while simple, practical, and traditional, are a long way from being aerodynamically desirable. The aerodynamic driving force of the sails is, of course, just as large and just as important as the hydrodynamic resistance of the hull. Yet, designers will go to great lengths to fair hull lines and tank test hull shapes, while simply drawing a triangle on the plans to define the sails. There is no question in my mind that the application of the wealth of available airfoil technology will yield enormous gains in yacht performance when applied to sail design. Re cent years have seen the application of some of this technolo gy in the form of wing sails on the lYRU "C" class catamar ans. In this paper, I will review some of the aerodynamic re quirements of yacht sails which have led to the development of the wing sails. For purposes of discussion, we can divide sail require ments into three points of sailing: • Upwind and close reaching. -
Boat Compendium for Aquatic Nuisance Species (ANS) Inspectors
COLORADO PARKS & WILDLIFE Boat Compendium for Aquatic Nuisance Species (ANS) Inspectors COLORADO PARKS & WILDLIFE • 6060 Broadway • Denver, CO 80216 (303) 291-7295 • (303) 297-1192 • www.parks.state.co.us • www.wildlife.state.co.us The purpose of this compendium is to provide guidance to certified boat inspectors and decontaminators on various watercraft often used for recreational boating in Colorado. This book is not inclusive of all boats that inspectors may encounter, but provides detailed information for the majority of watercraft brands and different boat types. Included are the make and models along with the general anatomy of the watercraft, to ensure a successful inspection and/or decontamination to prevent the spread of harmful aquatic nuisance species (ANS). Note: We do not endorse any products or brands pictured or mentioned in this manual. Cover Photo Contest Winner: Cindi Frank, Colorado Parks and Wildlife Crew Leader Granby Reservoir, Shadow Mountain Reservoir and Grand Lake Cover Photo Contest 2nd Place Winner (Photo on Back Cover): Douglas McMillin, BDM Photography Aspen Yacht Club at Ruedi Reservoir Table of Contents Boat Terminology . 2 Marine Propulsion Systems . 6 Alumacraft . 10 Bayliner . 12 Chris-Craft . 15 Fisher . 16 Four Winns . 17 Glastron . 18 Grenada Ballast Tank Sailboats . 19 Hobie Cat . 20 Jetcraft . 21 Kenner . 22 Lund . 23 MacGregor Sailboats . 26 Malibu . 27 MasterCraft . 28 Maxum . 30 Pontoon . 32 Personal Watercraft (PWC) . 34 Ranger . 35 Tracker . 36 Trophy Sportfishing . 37 Wakeboard Ballast Tanks and Bags . 39 Acknowledgements . Inside back cover Boat Compendium for Aquatic Nuisance Species (ANS) Inspectors 1 Boat Terminology aft—In naval terminology, means towards the stern (rear) bow—A nautical term that refers to the forward part of of the boat. -
Pennsylvania
Spring 1991 $1.50 Pennsylvania • The Keystone States Official Boating Magazine Viewpoint Recently we received a letter suggesting that we were being contradictory in Boat Pennsylvania. According to one reader, we suggested that boaters wear personal flota- tion devices, but that the magazine photographs don't always show their use. Obtaining photographs for a magazine can be a difficult proposition. Sometimes we stage situations and take the photographs ourselves. More often, we rely on photographs submitted by contributors. Photos that depict the general boating public often do not show people wearing PFDs simply because the incidence of wearing them is so low. If we were to say that we would only use photos that showed boaters wearing PFDs, we would have a difficult time fmding acceptable photos. Generally, we try to show people wearing PFDs in small boats in situations in which devices should obviously be worn. On large boats, people most often do not wear their PFDs. Should people wear PFDs? Statistics show that wearing a PFD can save your life. Are PFDs needed all the time? Because accidents happen when they are least expected, wearing a PFD all the time is a good idea. Practically, however, as comfortable as the newest PFDs are, they can be excruciating on a hot July day. Many boaters also want to get a little sun. We accept this and our statistics show that the chances of having an accident where a PFD would have been a factor are much lower in the summer months. Ofcourse, circumstances do exist in which wearing a PFD,even on the hottest day, is warranted. -
Owner's Instructions Macgregor 26 M
JULY 17, 2007 OWNER’S INSTRUCTIONS MACGREGOR 26 M PAGE PAGE 1 SPECIAL SAFETY WARNINGS 14 MAINSAIL 4 GENERAL INFORMATION 15 JIB (FORWARD SAIL) 4 RECOMMENDED EQUIPMENT 16 GENOA (OPTION) 4 RIGGING THE MAST 16 REDUCING THE AREA OF THE MAINSAIL 6 PREPARING FOR TRAILERING 16 DAGGERBOARD 7 PREPARING THE TRAILER 16 RUDDERS 8 TOWING THE BOAT AND TRAILER 17 HATCHES 8 ATTACHING THE MAST SUPPORT WIRES 17 BOOM VANG 8 RAISING THE MAST 18 SELF-RIGHTING CAPABILITY 9 OPTIONAL MAST RAISING SYSTEM 18 FOAM FLOTATION 11 ADJUSTING THE MAST SUPPORT WIRES 18 POWERING 12 RAMP LAUNCHING 19 BOAT MAINTENANCE 12 THE WATER BALLAST SYSTEM 20 WIRING DIAGRAM 13 RETURNING THE BOAT TO ITS TRAILER 20 TRAILER MAINTENANCE 13 EMPTYING THE BALLAST TANK 20 LIMITED WARRANTY 13 CONNECT THE BOOM TO THE MAST 22 HOW TO SAIL 13 MAINSHEET 27 SAFETY DECALS SPECIAL SAFETY WARNINGS: THEN MAKE SURE THAT THE FORWARD VENT Boats, like any other form of transportation, have inherent PLUG AND THE TRANSOM VALVE ARE CLOSED risks. Attentions to these warnings and instructions should AND SECURE. help keep these risks to a minimum. THE FOLLOWING COMMENTS EXPLAIN WHY THE WATER BALLAST TANK SHOULD BE FULL THE ABOVE RULES ARE NECESSARY. WHEN EITHER POWERING OR SAILING. STABILITY. IF THE BALLAST TANK IS NOT COMPLETELY FULL, Unless the water ballast tank is completely full, with 1000 pounds THE BOAT IS NOT SELF RIGHTING. (IF YOU CHOOSE of water ballast, the sailboat is not self-righting. Without the TO OPERATE THE BOAT WITH AN EMPTY TANK, SEE water ballast, the boat may not return to an upright position if the THE SECTION ON OPERATING THE BOAT WITHOUT boat is tipped more than 60 degrees, and can capsize like most WATER BALLAST.) non-ballasted sailboats. -
2008 INTERNATIONAL OPTIMIST CLASS RULES Authority*: International Sailing Federation
2008 INTERNATIONAL OPTIMIST CLASS RULES Authority*: International Sailing Federation * The ISAF is not a National Authority as described in these rules CONTENTS Page Rule 2 1 GENERAL 2 2. ADMINISTRATION 2 2.1 English language 2 2.2 Builders 3 2.3 International Class Fee 3 2.4 Registration and measurement certificate 4 2.5 Measurement 4 2.6 Measurement instructions 5 2.7 Identification marks 6 2.8 Advertising 6 3 CONSTRUCTION AND MEASUREMENT RULES 6 3.1 General 6 3.2 Hull 6 3.2.1 Materials - GRP 7 3.2.2 Hull measurement rules 10 3.2.3 Hull construction details - GRP 3.2.4 Hull construction details - Wood and Wood/Epoxy (See Appendix A, p 25) 3.2.5 Not used 12 3.2.6 Fittings 13 3.2.7 Buoyancy 14 3.2.8 Weight 14 3.3 Daggerboard 16 3.4 Rudder and Tiller 19 3.5 Spars 19 3.5.2 Mast 20 3.5.3 Boom 21 3.5.4 Sprit 21 3.5.5 Running rigging 22 4 ADDITIONAL RULES 5 (spare rule number) 23 6 SAIL 23 6.1 General 23 6.2 Mainsail 6.3 Spare rule number 6.4 Spare rule number 25 6.5 Class Insignia, National Letters, Sail Numbers and Luff Measurement Band 26 6.6 Additional sail rules 27 APPENDIX A: Rules specific to Wood and Wood/Epoxy hulls. 29 PLANS. Index of current official plans. 1 GENERAL 1.1 The object of the class is to provide racing for young people at low cost. -
US Mulithull Safety Equipment Requirements Note: Organizing Authorities May Add Or Delete Items Based on the Conditions of Their Specific Races
US Mulithull Safety Equipment Requirements Note: Organizing Authorities may add or delete items based on the conditions of their specific races. Effective Date: March 13, 2019, revision 2019.0 Section Name # Requriement Ocean Coastal Nearshore Definition 1.01 Ocean: Long distance races, well offshore, where rescue may be delayed X Definition 1.02 Coastal: Races not far removed from shorelines, where rescue is likely to be quickly available X Definition 1.03 Nearshore: Races primarily sailed during the day, close to shore, in relatively protected waters. X The Safety Equipment Requirements establish uniform minimum equipment and training standards for a variety of boats racing in differing conditions. These regulations do not replace, but rather Overall 1.1 XXX supplement, the requirements of applicable local or national authority for boating, the Racing Rules of Sailing, the rules of Class Associations and any applicable rating rules. The safety of a boat and her crew is the sole and inescapable responsibility of the "person in charge", as per RRS 46, who shall ensure that the boat is seaworthy and manned by an experienced crew with sufficient ability and experience to face bad weather. S/he shall be satisfied Overall: Responsibility 1.2 XXX as to the soundness of hull, spars, rigging, sails and all gear. S/he shall ensure that all safety equipment is at all times properly maintained and safely stowed and that the crew knows where it is kept and how it is to be used. A boat may be inspected at any time by an equipment inspector or measurer appointed for the event. -
Warning Important Safety Information
WB 10 PERFORMANCE SAIL KIT ASSEMBLY INSTRUCTIONS ! WARNING IMPORTANT SAFETY INFORMATION - READ OWNER’S MANUAL. IMPROPER USE MAY CAUSE INJURY OR DEATH. - EACH PASSENGER MUST HAVE AN APPROVED PERSONAL FLOTATION DEVICE. - CARRY AN OAR AND BAILER ON BOARD WHILE SAILING. - USE A BUDDY SYSTEM, SAIL WHERE PEOPLE CAN SEE AND HELP YOU IF NECESSARY. - DO NOT USE A MOTOR OR SAIL UNLESS YOU USE THE EQUIPMENT IN THE MANNER INTENDED AND/OR AS DESCRIBED IN THE MANUAL. - DO NOT USE THIS BOAT UNDER THE INFLUENCE OF DRUGS OR ALCOHOL. - DO NOT USE THIS BOAT IF YOU SUSPECT A CRACK OR A HOLE. IT MAY ME UNSAFE. - USE CAUTION WHEN ENTERING OR EXITING THE BOAT. - KEEP YOUR WEIGHT CENTERED AND DISTRIBUTE THE WEIGHT OF GEAR AND PASSENGERS EVENLY. - DO NOT USE THIS BOAT AS A TOW CRAFT. - THIS BOAT IS NOT A TOY. ADULT SUPERVISION ADVISED. PARTS LIST (Specifications and contents subject to change without notice) A. Die Tool K. Boom: 80” x 1.3” / 2.03m x 3.3cm B. Dowel L. Line Kit C. Daggerboard Housing Cap Assembly 1. Outhaul Line: 50” x 3/16” / 1.27m x 5mm D. Mast Support Tube 2. Vang Line: 60” x 3/16” / 1.53m x 5mm E. Mast Support Collar 3. Cunningham Line: 32” x 3/16” / 82cm x 5mm F. Seat Clamp Assembly 4. Mainsheet Line: 183” x 5/16” / 4.65m x 8mm G. Ratchet Block 5. Clew Line: 12” x 3/16” / 30cm x 5mm H. Lower Mast Half (w. Gooseneck ring): 90” x 1.76” / 2.28m x 4.5cm M. -
2019 Boat Auction Catalog.Pub
SEND KIDS TO CAMP BOAT AUCTION & Nautical Fair Saturday, June 8 Nautical Yard Sale: 8:00 AM Registration:10:00 AM Auction:11:00 AM Where: Penobscot Bay YMCA Auctioneer: John Bottero YACHTS OF FUN FOR EVERYONE! • Live & Silent Auction • Dinghy Raffle • Food Concessions SPECIAL THANKS TO OUR EVENT SPONSORS LEARN MORE: 236.3375 ● WWW.PENBAYYMCA.ORG We are most grateful to everyone’s most generous support to help make our Boat Auction a success! JOHN BOTTERO THOMASTON PLACE AUCTION GALLERIES BOAT AUCTION COMMITTEE • Jim Bowditch • Paul Fiske • Larry Lehmann • Neale Sweet • Marty Taylor SEAWORTHY SPONSORS • Gambell & Hunter Sailmakers • Ocean Pursuits LLC • Maine Coast Construction • Wallace Events COMMUNITY PARTNERS • A Morning in Maine • Migis Lodge on Sebago Lake • Amtrak Downeaster • Once a Tree • Bay Chamber Concerts • Owls Head Transportation Museum • Bixby & Company • Portland Sea Dogs • Boynton-McKay Food Co. • Primo • Brooks, Inc. • Rankin’s Inc. • Camden Harbor Cruises • Red Barn Baking Company • Camden Snow Bowl • Saltwater Maritime • Cliff Side Tree • Samoset Resort • Down East Enterprise, Inc. • Schooner Appledore • Farnsworth Art Museum • Schooner Heritage • Flagship Cinemas • Schooner Olad & Cutter Owl • Golfer's Crossing • Schooner Surprise • Grasshopper Shop • Sea Dog Brewing Co. • Hampton Inn & Suites • Strand Theatre • House of Logan • The Inn at Ocean's Edge • Jacobson Glass Studio • The Study Hall • Leonard's • The Waterfront Restaurant • Maine Boats, Home and Harbors • UMaine Black Bears • Maine Wildlife Park • Whale's Tooth Pub • Maine Windjammer Cruises • Windjammer Angelique • Margo Moore Inc. • York's Wild Kingdom • Mid-Coast Recreation Center This is the Y's largest fundraising event of the year to help send kids to Summer Camp. -
Topaz-Range-Owner-Manual-2021.Pdf
TOPAZ TAZ RACE PLUS. TOPAZ UNO PLUS . TOPAZ UNO RACE . TOPAZ UNO RACE X TOPAZ TRES . TOPAZ VIBE . TOPAZ MAGNO . TOPAZ RANGER . TOPAZ ARGO TOPAZ OMEGA . TOPAZ FUSION . TOPAZ MAVERICK . TOPAZ XENON TOPAZ XENON XK1 . TOPAZ 12 . TOPAZ 14 . TOPAZ 16 www.toppersailboats.com TOPAZ RANGE OWNERS MANUAL PLEASE KEEP THIS MANUAL IN A SECURE PLACE AND HAND IT OVER TO THE NEW OWNER IF YOU SELL THE CRAFT. INDEX Page Introduction 3 Important Safety Information 4 General Warnings and Precautions 4 Using aTrailer 4 Before you go Sailing 5 On the Water 5 Design Category 5 Capsize Recovery 6 Being Towed When Afloat 7 Mooring and Anchoring 7 Outboard Engine (Topaz Omega) 7 Craft Identification Number 7 Builders Plate and Sail Number 7 Symbols 7 Maintenance & Service 8 Modifications 8 Manufacturer Contact Details 8 Specification Table 1 9 Specification Table 2 9 EU Declaration of Conformity 10-11 2 INTRODUCTION This document contains important safety information wave or gust which are potentially dangerous conditions, where which should be read and understood before moving only a competent, fit and trained crew using a well-maintained on to the seperate Rigging Instructions. craft can satisfactorily operate. The manual has been compiled to help you to operate The crew should be familiar with the use of all safety equipment your boat safely and get the most out of your sailing. and emergency manoeuvring (man overboard recovery, being It contains details of the craft; the equipment supplied towed etc.). All persons should wear a suitable personal or fitted, its systems and information on its operation floatation device (life jacket/buoyancy aid) when afloat. -
Ready, Set, Go: Time to Start Sailing
05_791431 ch01.qxp 4/28/06 7:23 PM Page 9 Chapter 1 Ready, Set, Go: Time to Start Sailing In This Chapter ᮣ Exploring the essentials of beginning sailing ᮣ Dissecting the parts of a sailboat ᮣ Answering basic sailing questions ᮣ Describing where sailing can take you It is an interesting biological fact that all of us have, in our veins, the exact same percentage of salt in our blood that exists in the ocean, and therefore, we have salt in our blood, in our sweat, in our tears. We are tied to the ocean. And when we go back to the sea, whether it is to sail or to watch it — we are going back from whence we came. —John F. Kennedy ater covers nearly three-quarters of the planet. Over the course of Whuman history, the oceans (as well as lakes and rivers) have served as pathways upon which trade and civilization have developed. Getting away from shore, you feel a link to those ancient mariners who set off for undiscov- ered lands. When you’re flying across the water, you’re harnessing the same forces ofCOPYRIGHTED nature that powered the early explorers.MATERIAL Why are humans drawn to the sea? President John F. Kennedy had a poetic answer. Generations before you have felt the call of the wind and waves, beck- oning to accept their offer of unknown possibilities — adventure and serenity. Even in today’s high-tech, fast-paced world, sailing regularly rates high on poll- sters’ lists of desirable activities. So if you ever find yourself dreaming of pack- ing it all in and setting sail over the horizon or of simply having your own boat to sail near home on a warm, breezy afternoon, you’re not alone. -
International Optimist Class Rules CONTENTS
International Optimist Dinghy Association 2018 www.optiworld.org International Optimist Class Rules CONTENTS Page Rule 2 1 GENERAL 2 2. ADMINISTRATION 2 2.1 English language 2 2.2 Builders 3 2.3 World Sailing Class Fee 3 2.4 Registration and Measurement Certificate 4 2.5 Measurement 4 2.6 Measurement Instructions 5 2.7 Identification Marks 6 2.8 Advertising 6 3 CONSTRUCTIONAND MEASUREMENT RULES 6 3.1 General 6 3.2 Hull 6 3.2.1 Materials - GRP 7 3.2.2 Hull Measurement Rules 10 3.2.3 Hull Construction Details - GRP 12 3.2.4 Hull Construction Details - Wood and Wood/Epoxy (See Appendix A, p 27) 3.2.5 Not used 12 3.2.6 Fittings 13 3.2.7 Buoyancy 14 3.2.8 Weight 14 3.3 Daggerboard 16 3.4 Rudder and Tiller 19 3.5 Spars 19 3.5.2 Mast 20 3.5.3 Boom 21 3.5.4 Sprit 21 3.5.5 Running Rigging 22 4 ADDITIONAL RULES 5 (spare rule number) 23 6 SAIL 23 6.1 General 23 6.2 Sailmaker 6.3 Mainsail 6.4 Dimensions 25 6.5 Class Insignia, National Letters, Sail Numbers and Luff Measurement Band 26 6.6 Additional Rules (Sail) 27 APPENDIX A: Rules Specific to Wood and Wood/Epoxy Hulls. 29 PLANS: Index of current official plans. 30 Addendum - Information and References to World Sailing Advertising Code 1 1 GENERAL 1.1 The object of the class is to provide racing for young people at low cost. 1.2 The Optimist is a One-Design Class Dinghy. -
OWNERS MANUAL Introduction
OWNERS MANUAL Introduction his user manual is designed to help you to get the most from your Neil Pryde sails. Whether Tyou are a cruising or racing sailor, investment in sails is an important aspect of your sailing program. We want you to have all the information you need to get top performance. Neil Pryde operates from a centralized loft. We rely on an extensive worldwide network of sail consultants to service our customers needs. Our consultants will help you get the most from your relationship with Neil Pryde. If, after reading this booklet, you have further questions, please don’t hesitate to contact either your local Neil Pryde consultant or the International Design and Sails Office at: Neil Pryde Sails 354 Woodmont Road #18 Milford, Conn. 06460 U.S.A. Tel: (203) 874-6984 FAX: (203) 877-7014 On-Line E-Mail: [email protected] On The Web: http://www.neilprydesails.com Neil Pryde Terminology n this discussion we use many technical terms with very specific meanings, While most are Istandard terms, other sailmakers sometime use alternative terms. Glossary of Terms Halyards and cunninghams Halyards are lines used to pull the sails up and to adjust the position of the draft (sail camber, curvature Figure 1 or “fullness”) fore or aft in the sail. They don’t significantly alter whether the sail is more full or less full. More tension on the halyards brings the draft of the sail forward; less tension drops it back. (figure 1) Cunninghams are down haul lines for fine tuning luff tension after the halyard is tightened and cleated off.