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Re: AC72 Oracle Team USA Spaceship has landed [Re: Angelo190471] #253023
10/03/12 06:29 AM
10/03/12 06:29 AM
Joined: Aug 2003
Posts: 351
Santiago, Chile
Andinista Offline
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Santiago, Chile
Originally Posted by optikid
notice how much the boat shakes when it foils! 3:28

Yes, the leeward hull moves up and down with the waves and the other one remains steady. And on 2:50 both hulls seems to point in different directions.
Flexibility?

-- Have You Seen This? --
Re: AC72 Oracle Team USA Spaceship has landed [Re: Andinista] #253087
10/03/12 08:13 PM
10/03/12 08:13 PM
Joined: Jun 2001
Posts: 12,310
South Carolina
Jake Offline
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Originally Posted by Andinista
Originally Posted by optikid
notice how much the boat shakes when it foils! 3:28

Yes, the leeward hull moves up and down with the waves and the other one remains steady. And on 2:50 both hulls seems to point in different directions.
Flexibility?


I think it's safe to assume that Oracle has determined that platform flex is not that big of a deal. It seemed that way with the big trimaran too. The other teams have gone to great lengths with the posts and rigging to stiffen up the platforms at the cost of weight and wind drag...better or worse? dunno.


Jake Kohl
Re: AC72 Oracle Team USA Spaceship has landed [Re: P.M.] #253091
10/03/12 09:33 PM
10/03/12 09:33 PM
Joined: Mar 2009
Posts: 932
Solomon's Island, MD
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samc99us Offline
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Very exciting. And very very interesting. On small boats (under ~30') the moto has always been stiffer is faster. It seems the bigger the boat and the faster you go some give might be faster (lighter), or at least your boat might not blow up (ala nomex cores in the southern ocean)? Definitely be exciting to watch the races, that is for sure!


Scorpion F18
Re: AC72 Oracle Team USA Spaceship has landed [Re: samc99us] #253101
10/04/12 07:32 AM
10/04/12 07:32 AM
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Posts: 12,310
South Carolina
Jake Offline
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Originally Posted by samc99us
Very exciting. And very very interesting. On small boats (under ~30') the moto has always been stiffer is faster. It seems the bigger the boat and the faster you go some give might be faster (lighter), or at least your boat might not blow up (ala nomex cores in the southern ocean)? Definitely be exciting to watch the races, that is for sure!


I've always wondered about that...I know it certainly feels better when the boat is rigid through the waves....but is it faster? People talk about energy lost when a wave makes the platform flex but it is kinda like a spring - you'll get a good bit of that "energy" back on the return...whether that's beneficial or not, I have no idea.


Jake Kohl
Re: AC72 Oracle Team USA Spaceship has landed [Re: Jake] #253212
10/06/12 09:51 AM
10/06/12 09:51 AM
Joined: Nov 2002
Posts: 465
FL
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FL
From the '70's onward the Tornado got faster the stiffer it became.
Before the Marstrom, new Tornado's were fast.
Finally Marstrom made the sfiffest Tornado with the autoclave technology,
and changing the rear beam to the largest size under class rules helped too.
Marstrom would not have gone to a larger (& stiffer) rear beam if it made the boat slower.

Re: AC72 Oracle Team USA Spaceship has landed [Re: P.M.] #253215
10/06/12 12:05 PM
10/06/12 12:05 PM
Joined: Sep 2002
Posts: 3,224
Roanoke Island ,N.C.
Team_Cat_Fever Offline
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I think the flex is used as a foil control, not faster just a way to get around the "no manual control" rule.


"I said, now, I said ,pay attention boy!"

The cure for anything is salt water - sweat, tears, or the sea
Isak Dinesen
If a man is to be obsessed by something.... I suppose a boat is as good as anything... perhaps a bit better than most.
E. B. White
Re: AC72 Oracle Team USA Spaceship has landed [Re: Team_Cat_Fever] #253217
10/06/12 01:17 PM
10/06/12 01:17 PM
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Posts: 893
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waynemarlow Offline
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With foiling its all about light weight, is the extra stiffness on this sort of length of boat going to impede any chance of it foiling, due to the extra weight of the construction needed to prevent twist.

Re: AC72 Oracle Team USA Spaceship has landed [Re: P.M.] #253218
10/06/12 03:48 PM
10/06/12 03:48 PM
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japan
erice Offline
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japan
surprise surprise

it seems that fluttering

was tearing the boat apart...

"What we have is something that's trying to act like a plane," he told a luncheon audience at the Golden Gate Yacht Club, adding that Oracle's boat needed extensive repairs after foiling at high speed.

last sentence here

http://www.mercurynews.com/californ...ben-ainslie-leads-strong-showing-opening


Last edited by erice; 10/06/12 03:51 PM.

eric e
1982 nacra 5.2 - 2158
2009 weta tri - 294
Re: AC72 Oracle Team USA Spaceship has landed [Re: Team_Cat_Fever] #253228
10/07/12 09:23 PM
10/07/12 09:23 PM
Joined: Jan 2008
Posts: 3,655
Portland, Maine
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ThunderMuffin Offline
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Portland, Maine
Originally Posted by Team_Cat_Fever
I think the flex is used as a foil control, not faster just a way to get around the "no manual control" rule.


Winner winner chicken dinner.

Re: AC72 Oracle Team USA Spaceship has landed [Re: erice] #253247
10/08/12 09:11 AM
10/08/12 09:11 AM
Joined: Jun 2001
Posts: 12,310
South Carolina
Jake Offline
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Originally Posted by erice
surprise surprise

it seems that fluttering

was tearing the boat apart...

"What we have is something that's trying to act like a plane," he told a luncheon audience at the Golden Gate Yacht Club, adding that Oracle's boat needed extensive repairs after foiling at high speed.

last sentence here

http://www.mercurynews.com/californ...ben-ainslie-leads-strong-showing-opening



yikes....


Jake Kohl
Re: AC72 Oracle Team USA Spaceship has landed [Re: P.M.] #253248
10/08/12 09:20 AM
10/08/12 09:20 AM

M
MN3
Unregistered
MN3
Unregistered
M



Didn't i see (here) they are only allowed 30 days of training? does all this load testing count towards that 30 days or is that for "race training" whatever/if there is a difference

Re: AC72 Oracle Team USA Spaceship has landed [Re: Team_Cat_Fever] #253249
10/08/12 09:25 AM
10/08/12 09:25 AM
Joined: Aug 2011
Posts: 774
Greenville SC
bacho Offline
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Greenville SC
Originally Posted by Team_Cat_Fever
I think the flex is used as a foil control, not faster just a way to get around the "no manual control" rule.


How would flex be controlling the foiling? They can move the daggers tilting forward or back to control via a ram. I can't see how the boat flex would help them in any way.

Re: AC72 Oracle Team USA Spaceship has landed [Re: ] #253250
10/08/12 09:26 AM
10/08/12 09:26 AM
Joined: Aug 2011
Posts: 774
Greenville SC
bacho Offline
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Greenville SC
Originally Posted by MN3
Didn't i see (here) they are only allowed 30 days of training? does all this load testing count towards that 30 days or is that for "race training" whatever/if there is a difference


I think that The emirates video said any more than 5 minutes sailing untethered counted as a day.

Re: AC72 Oracle Team USA Spaceship has landed [Re: P.M.] #253254
10/08/12 10:22 AM
10/08/12 10:22 AM
Joined: Feb 2005
Posts: 4,118
Northfield Mn
Karl_Brogger Offline
Carpal Tunnel
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Northfield Mn
untethered?


I'm boatless.
Re: AC72 Oracle Team USA Spaceship has landed [Re: Karl_Brogger] #253261
10/08/12 11:19 AM
10/08/12 11:19 AM
Joined: Sep 2002
Posts: 3,224
Roanoke Island ,N.C.
Team_Cat_Fever Offline
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Roanoke Island ,N.C.
Originally Posted by Karl_Brogger
untethered?


From the towboat.


"I said, now, I said ,pay attention boy!"

The cure for anything is salt water - sweat, tears, or the sea
Isak Dinesen
If a man is to be obsessed by something.... I suppose a boat is as good as anything... perhaps a bit better than most.
E. B. White
Re: AC72 Oracle Team USA Spaceship has landed [Re: P.M.] #253460
10/13/12 09:34 PM
10/13/12 09:34 PM
Joined: Dec 2006
Posts: 2,490
On the Water
P.M. Offline OP
Pooh-Bah
P.M.  Offline OP
Pooh-Bah

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On the Water
Set your DVR or watch it this Sunday on NBCSN or VERSUS at 2:30 PM EST.
The Road to the America's Cup - Oracle Team USA
hosted by non other than . . .
you guessed it, our AC genius Todd Harris.

"Tag along as WOAS takes an exclusive inside look at the design and construction of the epic 72-foot catamaran the team will be charging into battle with at the 34th Americas Cup in September 2013. Remarkable feats of engineering and copious amounts of training aren't all that it takes to make an America's Cup champion. It also takes heart and perseverance which, luckily, Oracle Team USA has in abundance."


Philip
USA #1006
Re: AC72 Oracle Team USA Spaceship has landed [Re: P.M.] #253556
10/16/12 06:11 PM
10/16/12 06:11 PM
Joined: Dec 2006
Posts: 2,490
On the Water
P.M. Offline OP
Pooh-Bah
P.M.  Offline OP
Pooh-Bah

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On the Water
just happened

Ouch


Philip
USA #1006
Re: AC72 Oracle Team USA Spaceship has landed [Re: P.M.] #253557
10/16/12 06:32 PM
10/16/12 06:32 PM
Joined: Dec 2006
Posts: 2,490
On the Water
P.M. Offline OP
Pooh-Bah
P.M.  Offline OP
Pooh-Bah

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Posts: 2,490
On the Water


Philip
USA #1006
Re: AC72 Oracle Team USA Spaceship has landed [Re: P.M.] #253558
10/16/12 06:54 PM
10/16/12 06:54 PM
Joined: Dec 2006
Posts: 2,490
On the Water
P.M. Offline OP
Pooh-Bah
P.M.  Offline OP
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On the Water
abclocal.go.com/kgo/livenow?id=8849852#&cmp=twi-kgo-article-8849852


Philip
USA #1006
Re: AC72 Oracle Team USA Spaceship has landed [Re: P.M.] #253559
10/16/12 07:18 PM
10/16/12 07:18 PM
Joined: Aug 2011
Posts: 774
Greenville SC
bacho Offline
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Greenville SC
Damn!

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