Anyone watching this stuff?
360% turns while on foil .... https://www.youtube.com/watch?v=LbWjltQvKcs
Edited by MN3 on Jan 14, 2021 - 09:26 AM.
Americas Cup
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Posted: Jan 14, 2021 - 09:22 AM
I know, I know - they aren't catamarns but the sport is still sailing and the technology is pretty wild
Anyone watching this stuff?
360% turns while on foil .... https://www.youtube.com/watch?v=LbWjltQvKcs
Edited by MN3 on Jan 14, 2021 - 09:26 AM. -
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Posted: Jan 14, 2021 - 10:55 AM
Sometimes I watch some YT content. Ridiculous what the AC75 are doing. Especially turning on foil without relevant loss of speed seems pretty nice comparing to my 5.0 which nearly slows down to zero when tacking. lol:
I think sailing in commercial shipping still has potential. And this is a major benefit of this pricey hightech boats. The gain of knowledge about moving on water is huge. -
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Posted: Jan 14, 2021 - 03:41 PM
You know, we saw the AC evolution to multihulls and we all know that multihulls are shunned by the monohull community. Yes, these AC boats are technically monohulls which the monohull community can now claim... but with their foil outriggers are they really monohulls? I recall an article on the Ft Lauderdale/Key West race where a Corsair 31 crew was smelling the diesel engine used to move a canting keel foil/ballast until they passed the larger mega-million dollar mono. So what are these AC boats using to raise and lower their outrigger foils?
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Posted: Jan 14, 2021 - 04:04 PM
Betting electric. high speed jack screws or hydraulic, which could also be run off batteries.
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Chuck C.
H21SE 408
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Posted: Jan 14, 2021 - 04:19 PM
a battery-driven, hydraulic power-unit that supplies the energy to lift and lower the immensely strong - and heavy - foil cant arms. https://www.americascup.com/the-technology
" Foil Cant Systems may only be driven by battery power. Batteries will be supplied. "
https://www.americascup.com/the-technology
Last few AC's the crews grinders were creating hydrophilic pressure and it was stored in a an accumulator if i recall correctly. I am sure Philip or Sam can speak with much more knowledge than I on this. This power was used for everything from raising and lowering the boards to adjusting the sail/wing (and probably a cappuccino machine below deck)
I would guess it is similar for these boats, the grinders are creating the power for sail adjustments but i can't find any hard data on that at this time -
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Posted: Jan 14, 2021 - 05:53 PM
The foil cant system is AC one design. Every team gets the same package. The racing from last month revealed the possible Achilles Heel to the AC. There is a schit storm brewing behind the scene. Of all things it started with cant system software updates and some failures. The team that failed wants to blame it on the supplied software, etc., the other teams say if was their own fault with implementation. Could be a legal mess . . . .could . . .
Prada Cup (AC) racing starts tomorrow.
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Philip
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Posted: Jan 17, 2021 - 10:22 AM
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Posted: Jan 17, 2021 - 11:09 PM
Yep, that thing was completely out of the water!!!
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Marty
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Posted: Jan 18, 2021 - 09:49 AM
If I understood correctly, there are two backstays, the windward works and the leeward is eased? And they have to be set at each tack, real quick? -
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Posted: Jan 18, 2021 - 11:09 AM
Yes - one of the videos i saw they were saying they did not release the leaward one and that was the actual cause of the porpoising and capsize
https://www.youtube.com/watch?v=ah5V8RHE1_Y
Edited by MN3 on Jan 18, 2021 - 11:11 AM. -
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Posted: Jan 18, 2021 - 11:35 AM
If you want the facts watch the post race press conference from Terry Hutchinson. He is the skipper and team executive director. He addressed the "leeward runner" theory and completely debunked it.
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Philip
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Posted: Jan 18, 2021 - 06:51 PM
Thanks for the tip (to view the Presser) - https://www.youtube.com/watch?v=4-yvEmEqdBc
relevant discussion starts around 3:50
Actual statement about the backstay circa the 6:00 mark
"I haven't looked completely at the data to verify the runner (backstay) was maxed eased but I would also say that wasn't the reason"
seems to me he is saying" back stay doesn't seem to be the issue, Traveled all the way out was (potentially) bad, the running backstay was (maxed) eased but then the main was (max) eased which loaded up that backstay, the wind was 12 knots before the move, then 18 and jumped to 24 quickly"
i always travel out fully when I gybe, and the only time i have capsized in a heavy air gybe (and ejected through my sail) was the time i didn't travel out. But i do typically have my hand on the main (between the upper and lower block) and manually move the traveler (IF i can)
Edited by MN3 on Jan 18, 2021 - 06:59 PM. -
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Posted: Jan 18, 2021 - 07:01 PM
To be clear: i was replying to the 2 backstays - not sure how / when they are set - he does mention they are "pre-set" but i think he is talking about the setting / amount of tension -
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Posted: Jan 18, 2021 - 11:07 PM
If you get nothing else, they are scrapping "Defiant" to get the control system for the forward cant system to install into "Patriot". The control systems were a total loss. 16:10 of the video linked above. https://youtu.be/4-yvEmEqdBc
Edited by tominpa on Jan 19, 2021 - 12:08 AM.
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Tom
NACRA 5.7 (1984 Sail 181)
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Posted: Jan 26, 2021 - 12:56 PM
So... ya think they are gonna make it to the big show???
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Marty
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Posted: Jan 27, 2021 - 09:52 AM
https://www.usnews.com/ne…fter-rapid-repairs-in-nz
WELLINGTON, New Zealand (AP) — U.S. challenger American Magic returned its racing yacht Patriot to the water Wednesday just 10 days after a dramatic capsize threatened to ends its involvement in the America’s Cup in New Zealand.
Patriot was slowly lowered into the water at the team's Auckland base and was expected to sail later in the day to begin systems checks — the first step to a full return to racing.
On its relaunch, Patriot had a new emblem over the area of the bow which had been holed — crossed band aids bearing the Italian, British and New Zealand flags and the message: “thankyou."
American Magic tweeted a picture of the new emblem and said “after 9 days of round-the-clock effort, and the massive support of so many here in Auckland, back home and around the world, PATRIOT is back in her natural element.”
“The Prada Cup racecourse awaits her on Friday.”
An American Magic spokesperson told reporters "the band-aid graphic with the three flags that covers the repair is an acknowledgement from all of us within the American Magic team of the invaluable assistance received from each of the other three syndicates.”
The 75-foot Patriot has to pass inspection by the Cup measurement committee late Wednesday in order to race against Italian challenger Luna Rossa in the best-of-seven race challenger series semifinals which begin Friday.
The winner of the series will progress to the Prada Cup final where it will meet Britian’s INEOS Team UK. The loser will be out of the regatta.
American Magic’s shore team, assisted by boat builders from America’s Cup-holder Team New Zealand, have been working around the clock since the capsize occurred to repair extensive damage, including a big hole at the bow.
The U.S. yacht sustained internal and external damage and its complex electronic systems have had to be replaced. Patriot’s hydraulics are sealed and avoided the worst of the damage.
The achievement of American Magic in repairing Patriot on such a tight deadline has amazed rival teams and sailing experts. Patriot came close to sinking and was only saved by the swift response of the U.S. team and rivals who rushed to its assistance.
Ben Ainslie, skipper of the British team, wrote in a weekly newspaper column that he doubted his team could have overcome such a setback.
“I asked one of our senior engineers whether we would have been able to make it back for the semifinals had the same thing happened to us and he said ‘no chance,’" Ainslie said.
American Magic mainsail trimmer Paul Goodison told New Zealand media organization NZME the U.S. team hopes to “carry on where we left off” as Patriot is re-launched.
“We’re reassured by (designer) Silvio (Arrivabene) and the guys that the boat will be in a similar state,” Goodison said.
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Tom
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Posted: Jan 27, 2021 - 09:13 PM
The "band-aid" shout out was really cool. The boat is also called "Patriot 2.0"
I read today that they had another incident when practicing today where the boat kind of went bow up again and crashed down again but sustained no damage. Really hope they get it all sorted out for Friday's race.
Edited by martyr on Jan 27, 2021 - 09:14 PM.
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Marty
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Posted: Jan 27, 2021 - 09:36 PM
that doesn't sound very encouraging. I'll follow as best we can here in the U.S. where the only sports event seems to be the Super Bowl. Not nearly as interesting.
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Tom
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Posted: Jan 28, 2021 - 04:27 PM
Lets hope these mono sailors know enough to run maximum size sails on low/no wind days. they lost 2 races because they used undersized sails. Read our forums and even newbies know better, I watched those races and was astonished and dismayed. -
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Posted: Jan 28, 2021 - 04:43 PM
yes, these teams should be taking advice from the people in forums
Edited by MN3 on Jan 28, 2021 - 05:00 PM.
