Gourt > Sports > Events > Olympics > Sailing
Sailing is the skillful art of controlling the motion of a sailing ship or smaller boat, across a body of water. Sailing vessels are propelled by the force of the wind on sails. Today, for most people, sailing is recreation, an activity pursued for the joy of being on the water and pursuing the mastery of the skills needed to maneuver a sailboat in varying sea and wind conditions. Recreational sailing can be further divided into Racing, Cruising and "Daysailing."
Introduction
A boat moves as wind pushes on its sails. This is obvious when the boat is sailing downwind. The keel of a boat keeps it from strafing to the sides. This allows a boat to sail downwind but at an angle. The wind that blows on a sail is deflected off the sail, and that wind pushes against the sail too. The result is that the sail is not just pushed straight downwind, no matter which way it faces; but rather, it is pushed in the direction that it bows. This lets a boat pointed upwind, though at an angle and not straight upwind, to move forward as long as the sail is able to bow forward. If the sail is pointed just as the boat, then the boat will only be pushed sideways, yet if the sail is pointed into the wind, then it will not catch the wind at all. So, the sail must be pointed somewhere between.- A boat moves forward with a resultant force proportional to the dot product of the forward vector of the boat and the force vector of the sail on the boat. The force of the sail on the boat is parallel to the average normal vector of the sail and is proportional to the dot product of the relative wind vector and the average normal vector of the sail. This proportionality is most obvious because depending on the angle of incidence of the wind on the sail, the effective area of the sail varies. So, a positive value for a resultant force on the boat requires that the angle of the sail be bound between the forward direction of the boat and the upwind source.
When sailing downwind, a boat catches up to the wind, so the wind cannot push as hard on the sails. When sailing at an angle to the wind, however, although the boat may move fast, it is not catching up to the wind, so the wind continues to push the boat faster. Of course, eventually the boat cannot move faster because of the water, but not before speeding along much faster than if it had been sailing directly downwind.
- The force on a sail is actually proportional to the relative velocity of the wind to the sail. Many factors complicate these generalities, however, such as the drag of the wind on the sails, the drag of moving through the water, the loss of wind force due to the boat heeling to a side so that the sails are pushed down and not just across the water.
[VOA] Eleanor Creesy: She Guided One of the Fastest Sailing Ships http://www.voanews.com/specialenglish/2009-12-22-voa3.cfm?rss=topstories
bottonVOA (bottonVOA) Sun, 27 Dec 2009 02:39:22 -0000
[VOA] Eleanor Creesy: She Guided One of the Fastest Sailing Ships http://www.voanews.com/specialenglish/2009-12-22-voa3.cfm?rss=topstories
I'm sailing right behind you...
valival (Valerie Donati) Sun, 27 Dec 2009 02:36:50 -0000
I'm sailing right behind you...
Check out my new song "Sailing". Filmed LIVE at the @Redhare FIN. Let me know what you think :) http://www.youtube.com/watch?v=GcNUDjamWvg
Cabelltice (Cabell Tice) Sun, 27 Dec 2009 02:34:30 -0000
Check out my new song "Sailing". Filmed LIVE at the @Redhare FIN. Let me know what you think :) http://www.youtube.com/watch?v=GcNUDjamWvg
kind of like wind waker more, though, tbh. :X even if it means spending half my life sailing.
lovesosweet (Kathy) Sun, 27 Dec 2009 02:33:53 -0000
kind of like wind waker more, though, tbh. :X even if it means spending half my life sailing.
had a nice Boxing Day amongst friends that he hadn't seen for 2 years! Sailing tomorrow; wish me luck. I need it.
yiannisc (Yiannis Costopoulos) Sun, 27 Dec 2009 02:32:00 -0000
had a nice Boxing Day amongst friends that he hadn't seen for 2 years! Sailing tomorrow; wish me luck. I need it.
RT @SailorsDisabled: Skipper David Pescud says via sat phone that they're sailing where time began... Just the crew, the boat and the wi ...
verityv (verity fraser) Sun, 27 Dec 2009 02:30:37 -0000
RT @SailorsDisabled: Skipper David Pescud says via sat phone that they're sailing where time began... Just the crew, the boat and the wi ...
49er Sailing Team - Official site of Olympic Champion Christoph Sieber. Site features the Beijing 2008 Olympic Campaign with news, general information, photos and videos.
Meta Description: [
Official Website of Windsurfing Olympic Champion Christoph Sieber and 49er Olympic
Sailing Campaign Beijing 2008 Christoph Sieber and Clemens Kruse includes latest news,
regattas, photos, videos, profiles, 49er technical details, sponsors and related links,
Offizielle Website des Windsurf Olympi... ]
Bassadone - Hopson Olympic Sailing Campaign - Site for the Christina Bassadone and Katherine Hopson Olympic Sailing campaign in preparation for the International 470 class at the 2008 Olympics in Beijing.
Meta Description: [ Bassadone - Clark Olympic 470 sailing campaign for Beijing 2008 ]
Odyssail - Details an international offshore sailing event taking place august 2004 in the eastern Mediterranean, which offers participating sailors access to the Athens Olympic Games.
Meta Description: [ , ]
500
Olympic Sailing Classes Website - Sailing news, results, and regatta information for Olympic and Paralympic classes.
Meta Description: [ Mambo - the dynamic portal engine and content management system ]
Team Eagle: Sailing for Beijing - A US disabled sailing team campaigning to represent the United States in the 2008 Paralympics in Beijing, China.
Meta Description: [ Team Eagle, a US disabled sailing team, is campaigning to represent the United States in the 2008 Paralympics in Beijing, China. We will be competing in the newly designed SKUD-18, which will be used in the two-person keelboat event. ]
Team McNay-Biehl - Campaigning for the 2008 Olympic Sailing Team.
Meta Description: [ Team MB - 470 sailing team for the 2008 Olympic games. ]
XpeditionGold - Dedicated to the Dutch women 470 Sailing team running for the Olympics.
Meta Description: [ Nederlands Olympisch 470 team Marcelien de Koning en Lobke Berkhout. ]
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