Catalyst N33 Jan 200
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On the Great Trimaran-Catamaran Debate
On the Great Trimaran-Catamaran Debate Lawrence J. Doctors, Member, School of MechanicnJ and Manufacturing Engineering, The University of New South Wales, Sydney, NSW 2052, Australia Abdmct In the cumwtt work, a aydewaatic investigation into a variety of monohulls and mul- tihulls is carried out with an emphasis on finding optimal forms. Vessels with up to six identical subhulls are taken into consideration and a large range of lengths is studied. hT- thermore, sidehuli trimaran configurations are included in the investigation. There are two main purposes to this investigation. Firstly, one is interested in mini- mizing the wave resistance, becawe this is closely related to the wave generation and is of critical importance to the operation of river ferries. Secondly, it is also important to min- imize the total resistance, in order to reduce fuei costs and to permit long-range trips for ocean-going vessels. The theoretical predictions show that increasing the length beyond that normally accepted is beneficial in reducing both the wave Resistance and often the total resistance. I. the goal is to minimize wave resistance and if the length is constrained, the calculations also demon- strate that trimarans are superior to catamarans, which are in turn superior to monohulls. On the other hand, if the goal is to minimize the total resistance, then all the muh!ihulis (~m catamarans to hezamarans) are inferior to monohulls, except possibly at low speeds which are not of interest in thw study. Similarly, sidehull trimarans are shown to be inferior to catamarans except perhaps if rather great lengths are permitted. -
Armed Sloop Welcome Crew Training Manual
HMAS WELCOME ARMED SLOOP WELCOME CREW TRAINING MANUAL Discovery Center ~ Great Lakes 13268 S. West Bayshore Drive Traverse City, Michigan 49684 231-946-2647 [email protected] (c) Maritime Heritage Alliance 2011 1 1770's WELCOME History of the 1770's British Armed Sloop, WELCOME About mid 1700’s John Askin came over from Ireland to fight for the British in the American Colonies during the French and Indian War (in Europe known as the Seven Years War). When the war ended he had an opportunity to go back to Ireland, but stayed here and set up his own business. He and a partner formed a trading company that eventually went bankrupt and Askin spent over 10 years paying off his debt. He then formed a new company called the Southwest Fur Trading Company; his territory was from Montreal on the east to Minnesota on the west including all of the Northern Great Lakes. He had three boats built: Welcome, Felicity and Archange. Welcome is believed to be the first vessel he had constructed for his fur trade. Felicity and Archange were named after his daughter and wife. The origin of Welcome’s name is not known. He had two wives, a European wife in Detroit and an Indian wife up in the Straits. His wife in Detroit knew about the Indian wife and had accepted this and in turn she also made sure that all the children of his Indian wife received schooling. Felicity married a man by the name of Brush (Brush Street in Detroit is named after him). -
Sailing Skills & Seamanship
Sailing Skills & Seamanship - Course Description The U.S. Coast Guard Auxiliary's Sailing Skills and Seamanship Course (SS&S) is a comprehensive course designed for both experienced and novice sailboat operators. The course, now in its 6 th edition that was published in 2008, is divided into parts: 10 core requirement two-to four-hour lessons plus 6 elective lessons that will enhance the skills required for a safe voyage in all conditions. These courses can be taught in addition to the core courses. TOPICS INCLUDE About Sailboats - Language of the sea; components of a sailboat; standing and running rigging; sails; types of sailboats; boat building materials; guidance on selecting and purchasing a boat. How A Boat Sails - Reading the wind; points of sailing, running, close hauled, reaching, sail shape; sail adjustments; when the wind picks up. Basic Sailboat Maneuvering - Tacking; jibbing; sailing a course; stability and angle of heel; knowing your boat. Rigging And Boat Handling - Stepping the mast; making sail; hoisting the sails; leaving the dock; mooring; controlling the sails; anchoring; weighing anchor. Equipment For Your Boat - Requirements for your boat; your boat's equipment; legal considerations. Trailering Your Sailboat - Legal considerations; practical considerations; selecting your trailer; the towing vehicle; handling your trailer; pre-departure checks; launching; retrieving; raising the mast; storing your boat and trailer; theft prevention; aquatic nuisance species; float plan. Your Highway Signs - Protection of ATONS; buoyage -
Mast Furling Installation Guide
NORTH SAILS MAST FURLING INSTALLATION GUIDE Congratulations on purchasing your new North Mast Furling Mainsail. This guide is intended to help better understand the key construction elements, usage and installation of your sail. If you have any questions after reading this document and before installing your sail, please contact your North Sails representative. It is best to have two people installing the sail which can be accomplished in less than one hour. Your boat needs facing directly into the wind and ideally the wind speed should be less than 8 knots. Step 1 Unpack your Sail Begin by removing your North Sails Purchasers Pack including your Quality Control and Warranty information. Reserve for future reference. Locate and identify the battens (if any) and reserve for installation later. Step 2 Attach the Mainsail Tack Begin by unrolling your mainsail on the side deck from luff to leech. Lift the mainsail tack area and attach to your tack fitting. Your new Mast Furling mainsail incorporates a North Sails exclusive Rope Tack. This feature is designed to provide a soft and easily furled corner attachment. The sail has less patching the normal corner, but has the Spectra/Dyneema rope splayed and sewn into the sail to proved strength. Please ensure the tack rope is connected to a smooth hook or shackle to ensure durability and that no chafing occurs. NOTE: If your mainsail has a Crab Claw Cutaway and two webbing attachment points – Please read the Stowaway Mast Furling Mainsail installation guide. Step 2 www.northsails.com Step 3 Attach the Mainsail Clew Lift the mainsail clew to the end of the boom and run the outhaul line through the clew block. -
Catalyst N05 Jul 200
Catalyst Journal of the Amateur Yacht Research Society Number 5 August, 2001 Catalyst News and Views 3 Winds of Change 2001 6 Keiper Foils 7 Letters Features 10 Wind Profiles and Yacht Sails Mike Brettle 19 Remarks on Hydrofoil Sailboats Didier Costes 26 Designing Racing Dinghies Part 2 Jim Champ 29 Rotors Revisited Joe Norwood Notes from Toad Hill 33 A Laminar Flow Propulsion System Frank Bailey 36 Catalyst Calendar On the Cover Didier Costes boats (See page 19) AUGUST 2001 1 Catalyst Meginhufers and other antiquities I spent most of July in Norway, chasing the midnight sun Journal of the and in passing spending a fair amount of time in Norway’s Amateur Yacht Research Society maritime museums looking at the development history of the smaller Viking boats. Editorial Team — Now as most AYRS members will know, the Vikings rowed Simon Fishwick and sailed their boats and themselves over all of Northern Sheila Fishwick Europe, and as far away as Newfoundland to the west and Russia and Constantinople to the east. Viking boats were Dave Culp lapstrake built, held together with wooden pegs or rivets. Specialist Correspondents Originally just a skin with ribs, and thwarts at “gunwale” level, th Aerodynamics—Tom Speer by the 9 century AD they had gained a “second layer” of ribs Electronics—David Jolly and upper planking, and the original thwarts served as beams Human & Solar Power—Theo Schmidt under the decks. Which brings us to the meginhufer. Hydrofoils—George Chapman I’m told this term literally means “the strong plank”, and is Instrumentation—Joddy Chapman applied to what was once the top strake of the “lower boat”. -
Trimarans and Outriggers
TRIMARANS AND OUTRIGGERS Arthur Fiver's 12' fibreglass Trimaran with solid plastic foam floats CONTENTS 1. Catamarans and Trimarans 5. A Hull Design 2. The ROCKET Trimaran. 6. Micronesian Canoes. 3. JEHU, 1957 7. A Polynesian Canoe. 4. Trimaran design. 8. Letters. PRICE 75 cents PRICE 5 / - Amateur Yacht Research Society BCM AYRS London WCIN 3XX UK www.ayrs.org office(S)ayrs .org Contact details 2012 The Amateur Yacht Research Society {Founded June, 1955) PRESIDENTS BRITISH : AMERICAN : Lord Brabazon of Tara, Walter Bloemhard. G.B.E., M.C, P.C. VICE-PRESIDENTS BRITISH : AMERICAN : Dr. C. N. Davies, D.sc. John L. Kerby. Austin Farrar, M.I.N.A. E. J. Manners. COMMITTEE BRITISH : Owen Dumpleton, Mrs. Ruth Evans, Ken Pearce, Roland Proul. SECRETARY-TREASURERS BRITISH : AMERICAN : Tom Herbert, Robert Harris, 25, Oakwood Gardens, 9, Floyd Place, Seven Kings, Great Neck, Essex. L.I., N.Y. NEW ZEALAND : Charles Satterthwaite, M.O.W., Hydro-Design, Museum Street, Wellington. EDITORS BRITISH : AMERICAN : John Morwood, Walter Bloemhard "Woodacres," 8, Hick's Lane, Hythe, Kent. Great Neck, L.I. PUBLISHER John Morwood, "Woodacres," Hythc, Kent. 3 > EDITORIAL December, 1957. This publication is called TRIMARANS as a tribute to Victor Tchetchet, the Commodore of the International MultihuU Boat Racing Association who really was the person to introduce this kind of craft to Western peoples. The subtitle OUTRIGGERS is to include the ddlightful little Micronesian canoe made by A. E. Bierberg in Denmark and a modern Polynesian canoe from Rarotonga which is included so that the type will not be forgotten. The main article is written by Walter Bloemhard, the President of the American A.Y.R.S. -
Hālāwai Papa Alakaʻi Kūmau Keʻena Kuleana Hoʻokipa O Hawaiʻi Hālāwai Kino a Kikohoʻe In-Person and Virtual Regular
HĀLĀWAI PAPA ALAKAʻI KŪMAU KEʻENA KULEANA HOʻOKIPA O HAWAIʻI HĀLĀWAI KINO A KIKOHOʻE IN-PERSON AND VIRTUAL REGULAR BOARD MEETING HAWAI‘I TOURISM AUTHORITY Pōʻahā, 24 Iune 2021, 9:30 a.m. Thursday, June 24, 2021 at 9:30 a.m. Kikowaena Hālāwai O Hawaiʻi Hawaiʻi Convention Center Papahele ʻEhā | Lumi Nui C Fourth Floor | Ballroom C 1801 Alaākea Kalākaua 1801 Kalākaua Avenue Honolulu, Hawaiʻi 96815 Honolulu, Hawaiʻi 96815 ʻO ka hoʻopakele i ke ola o ka lehulehu ka makakoho The safety of the public is of the utmost nui. E maliu ana ke keʻena i ke kuhikuhina a nā loea no importance. Pursuant to expert guidance, HTA will ke kū kōwā, ka uhi maka, me nā koina pili olakino ʻē be following strict physical distancing, facial aʻe. Koi ʻia ke komo i ka uhi maka a me ke kū kōwā ma coverings, and other health-related requirements. nā keʻena a ma nā hālāwai. Face coverings and physical distancing are required in HTA offices and meetings. Koi ʻia ka hōʻoia i kou olakino maikaʻi ma mua o ke Entrance to the Hawaiʻi Convention Center requires komo i ke Kikowaena Hālāwai O Hawaiʻi ma ka ʻīpuka o a health screening at the center parking garage waena o ka hale hoʻokū kaʻa. E pāpā ʻia ke komo ʻana o entrance. Persons with a temperature of over ke kanaka nona ka piwa ma luna aʻe o ka 100.4°F. Inā 100.4°F will be denied entry. If you are not feeling ʻōmaʻimaʻi ʻoe, e ʻoluʻolu, e ʻimi i ke kauka nāna e well, we urge you to contact a healthcare provider. -
5 Must Read Sailing Books for Catamaran Enthusiasts
5 Must Read Sailing Books for Catamaran Enthusiasts This list briefly discusses 5 books that yacht owners or enthusiasts should read. What makes each book unique? Why should they read the book? What will they learn or take away from it? This is - at least what we consider - the best 5 books ever written in English on the subject of cruising catamarans. There are a few German and French publications but they are nearly impossible to get , most are out of print and unless you can read German or French - are of no value. So here is the top 5 list of the "Must Read books for Catamaran Enthusiasts" 1.) CATAMARANS - THE COMPLETE GUIDE FOR CRUISING SAILORS, by Gregor Tarjan. First published in 2006 and reprinted in 2008 by Mc Graw Hill Companies, New York. ISBN 9780071498852. Hardcover, 305 pages full color, large format, illustrated and lavish photography by Gilles Martin Raget. Of course we have to mention this book first. Not only is it written by our own Gregor Tarjan, founder and owner of Aeroyacht Ltd., but it is hailed as "the industry reference" by many experts. It has sold many thousands of copies around the world and has been re-printed numerous times. Jim Brown calls it "an authoritative guide for novices and experienced sailors, the best book written on the subject since the early 1990's" 2.) MULTIHULL SEAMANSHIP - Illustrated, by Dr. Gavin LeSueur. Illustrations by Nigel Allison. First published in Australia in 1995, Cyclone Publishers. ISBN 1875181032. Soft cover, spiral bound, large format, 108 pages, black and white. -
Radical Bay 8000 Study Plans.Pub
SchionningSchionning DesignsDesigns SCHIONNING DESIGNS PTY LTD PO Box 42, Lemon Tree Passage, NSW, 2319, Australia Ph: (Int 61) 02 4982 5599 Fax: (Int 61) 02 4982 5499 www.schionningdesigns.com.au [email protected] ContentsContents Radical Bay 8000 Notes From The Designers ...........2 Design Profile and Description ......................4 Construction Overview ................5 Pre-cut Kit Options ......................6 Basic Materials List ......................8 Multi v's Mono ..............................9 ABOUT US... Material Choice .............................10 Hello and thank you for showing interest in our multihull de- signs. We would like this opportunity to introduce ourselves and to give you some information on our backgrounds so you may More about Balsa ..........................12 better judge our ability to design your boat. I was born in South Africa in 1946. My father was from an engineering background and had a very competitive spirit. He More about DuFlex .......................13 raced motorcycles, power boats and finally designed and built racing dinghies which he and I both sailed competitively. So I grew up in a boat building environment from an early age and Construction Photos .....................15 enjoyed working with boat design and building with my dad. From school I trained as a land surveyor and enjoyed the com- bination of outdoor work, complex mathematics and high accu- Payload Explanation.....................16 racy levels, whilst continuing to design, build and race yachts in my spare time. I was drawn back to serious boat building and started a yard (Lucky Bean Boat Yard - Knysna, S.Africa) spe- Steering Options ...........................17 cialising in cold moulded and composite yachts, building a num- ber of boats between 20’ - 45’ feet. -
Upffront.Com Structural Furling Forestays
©Karver Upffront.com Structural Furling Forestays The use of continuous line furlers and torsional cables for main structural forestays 1 www.upffront.com Contents: Page No. 1. Introduction 3 2. What is a “Structural Furling Forestay”? 3 a. Description 3 b. Advantages 5 c. Perceived disadvantages 8 3. Wire vs composite furling forestay 10 4. Deck and mast interfaces a. Fixed forestay length 11 b. Toggles or strops 11 12 5. Sail interfaces 13 a. Luff 13 b. Hoist 14 6. Specifying considerations 15 7. Conclusion 14 2 www.upffront.com 1. Introduction In this document you will be introduced to the use of continuous line furlers, together with torsional cables, as an alternative furling system for the main structural forestay. This is NOT a “traditional” genoa furling solution i.e. with an aluminium foil over the existing wire forestay, however, it is an increasingly popular, lightweight alternative for both offshore racing and cruising sailors alike. Traditional Genoa furler / foil system (©Facnor) We will be describing the key components, advantages and disadvantages of the system, discussing the appropriate use of wire vs composite fibre stays, setup methods and various sail interfaces and investigating the implications for the boat’s sail plan. Finally, we’ll be offering some guidance on correct specification. 2. What is a “Structural Furling Forestay”? a) Description The main forestay on a sailing yacht is a crucial part of its “standing rigging” i.e. primary mast support, without which the mast will fall down! It is a permanent installation, normally with a fixed length and an essential element for maintaining the correct rig tension and tune. -
December 2007 Crew Journal of the Barque James Craig
December 2007 Crew journal of the barque James Craig Full & By December 2007 Full & By The crew journal of the barque James Craig http://www.australianheritagefleet.com.au/JCraig/JCraig.html Compiled by Peter Davey [email protected] Production and photos by John Spiers All crew and others associated with the James Craig are very welcome to submit material. The opinions expressed in this journal may not necessarily be the viewpoint of the Sydney Maritime Museum, the Sydney Heritage Fleet or the crew of the James Craig or its officers. 2 December 2007 Full & By APEC parade of sail - Windeward Bound, New Endeavour, James Craig, Endeavour replica, One and All Full & By December 2007 December 2007 Full & By Full & By December 2007 December 2007 Full & By Full & By December 2007 7 Radio procedures on James Craig adio procedures being used onboard discomfort. Effective communication Rare from professional to appalling relies on message being concise and clear. - mostly on the appalling side. The radio Consider carefully what is to be said before intercoms are not mobile phones. beginning to transmit. Other operators may The ship, and the ship’s company are be waiting to use the network. judged by our appearance and our radio procedures. Remember you may have Some standard words and phases. to justify your transmission to a marine Affirm - Yes, or correct, or that is cor- court of inquiry. All radio transmissions rect. or I agree on VHF Port working frequencies are Negative - No, or this is incorrect or monitored and tape recorded by the Port Permission not granted. -
Forestay Replacement Instructions
www.kayaksailor.com FORESTAY 5) Insert the bungee into the hole in the mast head until a short section protrudes from the TM REPLACEMENT other side. INSTRUCTIONS: 7) Now pull on the end of the bungee and at the same time push the end of the forestay 1) Place your rig on a clean flat surface, or perform the procedure with the rig secured to into the hole. the boat. Some find it easier to replace the forestay with the rig mounted on the boat. 8) The friction of the bungee against the forestay will help to pull the forestay through the hole. 2) With the rig folded, carefully inspect the knot securing the bottom of the forestay. Take a picture of it with a digital camera if you need to. You will want to tie this same knot when the new forestay is installed. Next, untie these half hitches at the base of the forestay and slide the forestay out of the eyebolt. 3) Move up to the top of the mast head and untie 9) Tie an overhand knot in both the forestay the two overhand knots in the forestay and the and the bungee. bungee. 10) Pull the forestay and bungee so that these knots are firmly against the masthead. 4) Pull the head of the forestay and the forestay bungee out from the hole in the mast head. Now for the tricky part. The new forestay and bungee needs to be inserted into the hole in the mast head. The hole diameter in the mast head is a little too small for easy passage of both the 11) Insert the other end of the forestay into forestay and bungee.