Ce livre est une bible pour ceux qui veulent exploiter le vent au maximum. Les explications météo sont les plus fouillées que j'ai jamais lues dans un livre de voile. Pour avoir une idée du CV de l'auteur et de sa famille [...] avec des articles de Frank Bethwaite qui continue a plus de 80 ans (il est né en 1920) de s'interesser a la voile. La description de l'approche empirique qui a créé le Tasar est un modele de travail pragmatique et sans a-priori. Ce livre concerne bien sur ceux qui aime les skiffs et autres nouveaux dériveurs, mais aussi tous ceux qui veulent comprendre le vent et les réglages de leur voilier en détail.
Alors que je m'attendais à découvrir que les skiffs n'étaient utilisables que par ces fous d'australien, j'ai compris dans cet ouvrage que ces voiliers représentaient une rupture en terme d'optimisation. Leur maniement est simplement expliqué et il devient accessible une fois compris quelques bases. Ces bases sont rarement enseignées, voire rarement comprises, en France. J'ai mieux compris les images des équipages de 49er au planning permanent par vent médium avec un calme étonnant. A l'issue, j'ai craqué et sans être spécialiste de dériveur, j'ai acheté un skiff B14, au moins pour planer au près : que du bonheur !!! Pour autant, ce livre est utile pour tout autre pratiquant sérieux et, contrairement à ce qui est souvent écrit, la 1ère partie qui concerne les caractéristiques fines du vent (un must), prépare la 2ème partie en montrant comment les voiliers doivent répondre à ces caractéristiques : quelle logique ! Enfin, c'est le seul livre qui m'a permis de comprendre et de maîtriser quelques situations difficiles rencontrées sur d'autres voiliers. Attention, c'est de l'anglais et, en voulant éviter des formules théoriques, F Bethwaite fait appel à des analogies pas toujours facile à comprendre.
I have sailed a Tasar for the best part of my youth, and I have always appreciated the simplicity and ingenuity of its design. Frank Bethwaite is a gentleman and a genius. Once my father wrote him and he answered promptly with courtesy and helpfulness. This book is astonishingly deep, you hardly figured before that there can be so much to learn about weather, waves, wind and sailing. The foreword says it all: this book is written for those who like to sail fast and well.
Réellement une bible pour tous les adeptes du skiff/nouveau dériveur ! Tant en météo, technique de barre, réglage de voile, le père de Julian couche sur papier tout son savoir, ce qui n'est pas rien !!
Commentaires client les plus utiles sur Amazon.com (beta)
27 internautes sur 28 ont trouvé ce commentaire utile
THE resource for high performance sailing of our generation.21 février 1997
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This book is about high performance sailing, and how to go as fast, under sail, as you possibly can. It doesn't matter if you race keel boats, or sailboards, or dinghies or multihulls; if you read, understand and practice what is written in this book, you will be a faster sailor.
Frank and his family have include three Olympic competitors, four World Championships, as well as several Grand Masters (over age 60) World Championships by Frank himself. Frank has been a coach on the Australian Olympic Team since 1972 and also pursued pastimes with model gliders (twice open world endurance record holder) and full size sailplanes. His latest accomplishment is that of codesigner (with his son Julian)of the latest sailboat to be selected for the 2000 Sydney Olympic Games, the Bethwaite 49er.
The book itself is laid out into four distinct parts; wind, water, the boat, and handling. Nothing is made in the book of tactics or rules. Frank assumes that once you get out in front, you stay out front.
In all, a deeply technical book on how to sail faster. Highly recommended to serious sailors interested in performance. A must for any technical sailors library. Only once every 30 years or so does such a book come out, the last being C. A. Marchaj's "The Aero-Hydrodynamics of Sailing" from the 1960s. Don't miss it...
23 internautes sur 24 ont trouvé ce commentaire utile
New information on wind and sail trim for serious racers3 juillet 1998
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Frank Bethwaite and his son Julian are probably best known for their role in developing the Australian 18 skiffs and the 49er. However, Mr. Bethwaite's background as a meteorologist, engineer, and pilot gives him a unique perspective in analysing the sailor's wind and how to maximize performance. His studies of hull drag, sail drag, and sail drive give the serious racing sailor valuable new information on how to maximize performance in a variety of conditions. This book focuses on high-performance sailcraft, but the lessons are applicable to almost any racing boat. Mr. Bethwaite provides many charts, graphs, and illustrations to support his observations on maximizing performance. Although this is a technical book, it is written for the layman. This book significantly advances understanding of wind, sail trim, and boat handling. It is a must-read for anyone racing the new generation of planing sportboats like the Viper 640 or Melges 24, new high-performance racers like the Mumm 30 or One-Design 35, and the high-performance dinghies like the 29er, 49er, 505, Flying Dutchman, etc. But serious sailors of all sorts will benefit from the book, and the chapters on the development of the Australian 18 foot skiff are very interesting and not found in North American or European sailing texts.
18 internautes sur 20 ont trouvé ce commentaire utile
The best book ever on sailing or building faster boats19 octobre 2000
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I thought I knew about meteorology, waves, boatbuilding and sailing. I have a first class Cambridge degree in physics, have sailed and raced various boats (dinghies and sailboards) for 30 years and designed one fast dinghy. I thought I was one smart dude. Words begin to fail me. Wow! I wish I had known this lot 30 years ago. It turns out that I was pig ignorant. The book is the best I have ever seen on what the wind does. It's the best ever on how to handle it. It's extremely good on rigs and how to adjust them. It's not just the best ever, it's streets ahead. Don't expect to read it quickly. There is a vast amount to take in. If you really know your stuff you might get through it in a few weeks. Better to plan on a whole winter.
12 internautes sur 14 ont trouvé ce commentaire utile
how I got back into dinghy sailing17 octobre 2001
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I was a hot shot dinghy sailor from the 1960's, read most of the books at the time. Reintroduced to this by my sons and the recent purchaser of a 29'er (Julian Bethwaite design) and as a somewhat hapless and occasional 50+ year old skipper of the same boat I decided to read up on the skills necessary for this skiff. Sometimes you are born too early. I could have used this information 30 years ago (but so could most of us if it had been known and available). Better late than never. The book covers slow (traditional keel, old style dinghys) boats, medium speed (high performance, laser 2's) boats and fast boats(skiffs). It is well written in a conversational tone. As in most scientific works you may need to reread some of the more analytical parts depending on your prior educational training. There are some interesting experiments that you can perform simply in your sink, bath tub, hot tub or pool to demonstrate the hydro/aero dynamic principles. I've got 30 or 40 sailing books in my library but this encompasses the most information on how to sail fast of the whole lot.
5 internautes sur 5 ont trouvé ce commentaire utile
Overbearing in victory, surly in defeat28 juillet 2007
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Just what is going on in a sailboat race (perhaps a regatta where everyone is sailing their 505 dinghies, and wearing t-shirts with comments on them such as the one in the title of my review)?
This book tells us plenty about what is going on.
The first part is about wind. And at once we're told about the various surface wind patterns, how they arise, and how often they repeat. The light air patterns are called "steady, unsteady, oscillating, and ribboning," while the breeze patterns are "steady, wandering, pulsing, convergent/divergent, channeling, and harsh." There's an enormous amount of specific advice about how to spot what is happening and how to react to each of these cases. We also see a discussion of the "stability index," which incorporates a number of factors that control predictability.
There's also some general race preparation advice. If your boat can match the speed of all the other boats in all conditions and you know what you are doing, that makes you the favorite, and you ought to sail conservatively. You pick three or four other boats that might win, ignore the others, and if those boats (roughly speaking) stay together, you stay in touch with them. "If you don't sail away from them, they cannot sail away from you." You beat them one by one by using the wind patterns, but only by enough to gain "the tactical advantage you need to be ahead of or inside of the selected boats at the next mark." Similarly, if you can't figure out a pattern, you can guess that a few others (perhaps with better "local knowledge") may know what they are doing better than you do. In that case, you should sail defensively, staying with the top boats. Those top boats will beat you, as will a few of the "gamblers," but you will beat most of the rest of the gamblers.
The second (and shortest) section is about water. That means a discussion of the types of waves, and the implications for proper boat handling, as well as currents and tidal streams, which affect navigation and tactics.
The third section deals with the specifics of the boat. Non-planing boats win according to wind speed in light and moderate winds, and according to wind direction in stronger winds. Boats which can plane, but not to windward, will win with wind direction upwind and with wind speed downwind. Boats that can plane to windward will win with wind speed, not wind direction.
This section comprehensively discusses sails, rigs, foils, and hulls.
The final section is on handling, to windward, crosswind, and downwind. That includes a discussion of downwind sailing in light airs, where it is of prime importance for the crew of the boat to stay as still as possible. That means moving as smoothly as possible to set up the jib on a whisker pole or set the spinnaker.
This section also includes a chapter on "kinetics," which is the co-ordinated movement of sails, steering, and body weight. When sailing to windward, the only useful variety of this is "surging," which means slowly and smoothly rolling to leeward a little bit to increase forward thrust. In other wind conditions, there are several other techniques, including impulses, energy-recovery, and pumping (overtrimming).
Sailors of all abilities can learn plenty from this book. I recommend it.