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Old 09-07-2013, 04:11 PM   #1 (permalink)
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Default San Francisco - America's Cup

While zapping through the TV channels some weeks ago, I hit one broadcasting the America's Cup qualifying rounds. I know nothing of sailing, also didn't join the Alinghi hype going through our country some years ago, when suddenly everybody began to talk about sailing.

But these new boats are incredible... (still bit confused, how they can have double the speed of the wind ). Followed each race and was fascinated by the speed - and the wonderful scenery in the background. I really need to visit that city one day.
A friend who's an amateur sailor just huffed condescendingly, frowned and said, that's no sailing anymore, that's just high-tech spectacle. Well, I'm pretty impressed by this high-tech

Anybody here from San Francisco who's seen them on site? They must be impressively huge.
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Old 09-07-2013, 05:34 PM   #2 (permalink)
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I'm not from S.F., but my uncle lives there, and has for most of my life. The boats are pretty good sized for sure. He's an avid sailor, and he loves watching them practice in the bay. As for your friend, to each their own I suppose, but those boats are pretty bad ass.
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Old 09-07-2013, 07:54 PM   #3 (permalink)
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SF is one of my top 5 favorite cities. Great place to visit. My best friend is a mega motor yacht capt and has cruised on one of these sail boats across the Atlantic. He was amazed by it. It was twice the speed on avg of his 200-400' yachts he is usually on.
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Old 09-07-2013, 08:08 PM   #4 (permalink)
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But these new boats are incredible... (still bit confused, how they can have double the speed of the wind ).
The sail is designed similar to an airplane wing. With a plane it's what allows it to develop lift
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Old 09-07-2013, 08:22 PM   #5 (permalink)
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Sailboats are weird like that... When the wind is coming straight over the back of the boat, it can't go faster than the speed of the wind. But when the wind is coming over the side of the boat, the sail, hull, centerboard, and rudder can absorb the full force of the wind and translate that into even faster forward speed.
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Old 09-07-2013, 08:23 PM   #6 (permalink)
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They had around 16knt wind today and went 42knt top speed. Unfortunately, the comentator on the German channel sucks; he repetes to mention it's cos of the new wing sails but that's not explaining HOW. Guess it'll have something to do with Bernulli and using the head wind for further impulse?
Anyhow, it's amazing to see these 15000lbs catamarans thrash on these tiny foils at such speed. First race today was pretty exciting

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Old 09-07-2013, 08:45 PM   #7 (permalink)
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The sail is designed similar to an airplane wing. With a plane it's what allows it to develop lift
So it is the head wind that creates the lift (=pull)? That would mean that the bow of the wing is adjustable? I'd imagine that the convex bow would need to face the head wind in the direction you want to go, and this would mean one has to change the bow after each turn...?
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Old 09-07-2013, 09:50 PM   #8 (permalink)
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Check out land sailing for even more exciting nature-power. The world record is over 200 km/h with only 50-80k gusts. Bad ass.
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Old 09-07-2013, 11:20 PM   #9 (permalink)
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So it is the head wind that creates the lift (=pull)? That would mean that the bow of the wing is adjustable? I'd imagine that the convex bow would need to face the head wind in the direction you want to go, and this would mean one has to change the bow after each turn...?
Pretty much. Each time they tack you'll see the crews switching boat sides and swinging the boom. On rare occasions some one will get hit by the boom and end up in the water
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Old 09-07-2013, 11:22 PM   #10 (permalink)
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Sailing Anarchy
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