Announcements
New Discussions
Hull pressurizing
by DaleYoung. 06/14/22 08:16 PM
Daggerboard cutout base seal on hull
by nobrush. 05/30/22 03:33 PM
Previous Thread
Next Thread
Print Thread
Rate Thread
Hop To
Page 33 of 202 1 2 31 32 33 34 35 201 202
Re: AC72 Oracle Team USA Spaceship has landed [Re: P.M.] #260890
07/03/13 08:03 AM
07/03/13 08:03 AM
Joined: Jan 2009
Posts: 5,525
pgp Offline
Carpal Tunnel
pgp  Offline
Carpal Tunnel

Joined: Jan 2009
Posts: 5,525


Pete Pollard
Blade 702

'When you have a lot of things to do, it's best to get your nap out of the way first.

-- Have You Seen This? --
Re: AC72 Oracle Team USA Spaceship has landed [Re: P.M.] #260892
07/03/13 08:25 AM
07/03/13 08:25 AM
Joined: Aug 2007
Posts: 3,969
B
brucat Offline
Carpal Tunnel
brucat  Offline
Carpal Tunnel
B

Joined: Aug 2007
Posts: 3,969
Thank you Philip! That Slingsby video should deflate any screaming about an intent to cheat.

Mike

Re: AC72 Oracle Team USA Spaceship has landed [Re: P.M.] #260893
07/03/13 08:36 AM
07/03/13 08:36 AM
Joined: Jun 2001
Posts: 12,310
South Carolina
Jake Offline
Carpal Tunnel
Jake  Offline
Carpal Tunnel

Joined: Jun 2001
Posts: 12,310
South Carolina
huh. So it seems that the reasoning behind the "symmetrical rudder is safer" is to avoid failures of the 90 degree rudder to foil joint. I can see how this would cause a major problem if this broken during a big bear away (who knows, it may have let go during Oracle's big capsize or Alingi's) and I think it adds a little merit to the point for using them.

However, I feel like I should point out that all of them are using asymmetrical dagger boards that should be seeing considerably more loading than the rudders...soo....uhhhh.errrr


Jake Kohl
Re: AC72 Oracle Team USA Spaceship has landed [Re: pgp] #260896
07/03/13 09:00 AM
07/03/13 09:00 AM
Joined: Mar 2009
Posts: 932
Solomon's Island, MD
S
samc99us Offline
old hand
samc99us  Offline
old hand
S

Joined: Mar 2009
Posts: 932
Solomon's Island, MD
Originally Posted by pgp


What's this all-black sailing team they are speaking of? Do they have a boat? Or did some Durham-based African Americans who haven't set foot on a boat decide they needed a piece of the $100 million???

That video from Oracle certainly clears a few things up for me and makes it a little less like cheating. I had assumed the elevator attached to the rudder was movable ala Moth. Adjusting the entire rudder rake+elevator still sounds fairly illegal but their setup really seems optimized for quick testing and not necessarily speed gains while racing.

I really hope whoever wins sees the light and brings foiling AC45's to the action.


Scorpion F18
Re: AC72 Oracle Team USA Spaceship has landed [Re: Tony_F18] #260897
07/03/13 09:02 AM
07/03/13 09:02 AM
Joined: Dec 2001
Posts: 5,590
Naples, FL
waterbug_wpb Offline
Carpal Tunnel
waterbug_wpb  Offline
Carpal Tunnel

Joined: Dec 2001
Posts: 5,590
Naples, FL
Originally Posted by Tony_F18

Dont think a helmet (or anything!) will protect you from hitting that at 40kts.


I agree, and from what little experience I have hitting things with my face (thanks Karl), getting sliced up by a winglet at 40 knots does not sound pleasant in the least bit.


Jay

Re: AC72 Oracle Team USA Spaceship has landed [Re: catman] #260898
07/03/13 09:05 AM
07/03/13 09:05 AM
Joined: Dec 2001
Posts: 5,590
Naples, FL
waterbug_wpb Offline
Carpal Tunnel
waterbug_wpb  Offline
Carpal Tunnel

Joined: Dec 2001
Posts: 5,590
Naples, FL
Originally Posted by catman


The other part thats causing a stir is LR and NZ have asymmetrical rudder foils. The leg of the T is longer on the inside than the outside. OR has symmetrical foils, both legs of the T are the same.


So, could OR just move their rudder posts (i.e, the entire rudder) a little bit inboard to allow for more symmetrical winglets and not exceed max beam? Or would that screw up the steering so bad it's not worth it?


Jay

Re: AC72 Oracle Team USA Spaceship has landed [Re: samc99us] #260899
07/03/13 09:15 AM
07/03/13 09:15 AM
Joined: Dec 2006
Posts: 2,490
On the Water
P.M. Offline OP
Pooh-Bah
P.M.  Offline OP
Pooh-Bah

Joined: Dec 2006
Posts: 2,490
On the Water
Originally Posted by samc99us
Originally Posted by pgp


What's this all-black sailing team they are speaking of?

I posted on it awhile back. The NC syndicate applied for the AC as a challenger, and was denied for questionable reasons. So the denied challenger has sued in the NY courts.


Philip
USA #1006
Re: AC72 Oracle Team USA Spaceship has landed [Re: P.M.] #260901
07/03/13 09:34 AM
07/03/13 09:34 AM
Joined: Dec 2006
Posts: 2,490
On the Water
P.M. Offline OP
Pooh-Bah
P.M.  Offline OP
Pooh-Bah

Joined: Dec 2006
Posts: 2,490
On the Water


Philip
USA #1006
Re: AC72 Oracle Team USA Spaceship has landed [Re: P.M.] #260903
07/03/13 11:07 AM
07/03/13 11:07 AM
Joined: Sep 2002
Posts: 3,224
Roanoke Island ,N.C.
Team_Cat_Fever Offline
Carpal Tunnel
Team_Cat_Fever  Offline
Carpal Tunnel

Joined: Sep 2002
Posts: 3,224
Roanoke Island ,N.C.
Originally Posted by mummp
Originally Posted by samc99us
Originally Posted by pgp


What's this all-black sailing team they are speaking of?

I posted on it awhile back. The NC syndicate applied for the AC as a challenger, and was denied for questionable reasons. So the denied challenger has sued in the NY courts.


Google: African Diaspora Maritime


"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: waterbug_wpb] #260907
07/03/13 12:40 PM
07/03/13 12:40 PM
Joined: Jun 2001
Posts: 12,310
South Carolina
Jake Offline
Carpal Tunnel
Jake  Offline
Carpal Tunnel

Joined: Jun 2001
Posts: 12,310
South Carolina
Originally Posted by waterbug_wpb
Originally Posted by catman


The other part thats causing a stir is LR and NZ have asymmetrical rudder foils. The leg of the T is longer on the inside than the outside. OR has symmetrical foils, both legs of the T are the same.


So, could OR just move their rudder posts (i.e, the entire rudder) a little bit inboard to allow for more symmetrical winglets and not exceed max beam? Or would that screw up the steering so bad it's not worth it?


I wonder if there is a rudder/hull centerline rule...otherwise, that sure is a thought.


Jake Kohl
Re: AC72 Oracle Team USA Spaceship has landed [Re: P.M.] #260916
07/03/13 02:28 PM
07/03/13 02:28 PM
Joined: Jun 2002
Posts: 1,658
Florida Suncoast, Dunedin Caus...
catman Offline
Pooh-Bah
catman  Offline
Pooh-Bah

Joined: Jun 2002
Posts: 1,658
Florida Suncoast, Dunedin Caus...
Originally Posted by mummp
There you have it!


Awesome. Can't wait to see what's next. The more things change, the more they stay the same.


Have Fun
Re: AC72 Oracle Team USA Spaceship has landed [Re: Jake] #260921
07/03/13 03:08 PM
07/03/13 03:08 PM
Joined: Dec 2006
Posts: 2,490
On the Water
P.M. Offline OP
Pooh-Bah
P.M.  Offline OP
Pooh-Bah

Joined: Dec 2006
Posts: 2,490
On the Water
Originally Posted by Jake
Originally Posted by waterbug_wpb
Originally Posted by catman


The other part thats causing a stir is LR and NZ have asymmetrical rudder foils. The leg of the T is longer on the inside than the outside. OR has symmetrical foils, both legs of the T are the same.


So, could OR just move their rudder posts (i.e, the entire rudder) a little bit inboard to allow for more symmetrical winglets and not exceed max beam? Or would that screw up the steering so bad it's not worth it?


I wonder if there is a rudder/hull centerline rule...otherwise, that sure is a thought.

Why bother? He said their most recent symmetrical rudder wing is compliant.


Philip
USA #1006
Re: AC72 Oracle Team USA Spaceship has landed [Re: P.M.] #260923
07/03/13 03:18 PM
07/03/13 03:18 PM
Joined: Jan 2004
Posts: 1,884
Detroit, MI
mbounds Offline
Pooh-Bah
mbounds  Offline
Pooh-Bah

Joined: Jan 2004
Posts: 1,884
Detroit, MI
Now this just impresses the hell out of me. That's some serious laminate engineering.
[Linked Image]

Attached Files
ORRudderWingTest.jpg (167 downloads)
Re: AC72 Oracle Team USA Spaceship has landed [Re: mbounds] #260925
07/03/13 03:55 PM
07/03/13 03:55 PM
Joined: Nov 2005
Posts: 807
Hillsborough, NC USA
I
Isotope235 Offline
old hand
Isotope235  Offline
old hand
I

Joined: Nov 2005
Posts: 807
Hillsborough, NC USA
Originally Posted by mbounds
Now this just impresses the hell out of me. That's some serious laminate engineering.

Correct me if I'm wrong, but isn't that testing the load in the wrong direction?

Re: AC72 Oracle Team USA Spaceship has landed [Re: P.M.] #260926
07/03/13 03:57 PM
07/03/13 03:57 PM
Joined: Jun 2005
Posts: 302
Daytona Beach Florida
O
orphan Offline
enthusiast
orphan  Offline
enthusiast
O

Joined: Jun 2005
Posts: 302
Daytona Beach Florida
I guess that depends if the boat is foiling or diving for the bottom.

Re: AC72 Oracle Team USA Spaceship has landed [Re: mbounds] #260927
07/03/13 04:21 PM
07/03/13 04:21 PM
Joined: Apr 2005
Posts: 473
Panama City, Florida
Redtwin Offline
addict
Redtwin  Offline
addict

Joined: Apr 2005
Posts: 473
Panama City, Florida
[Linked Image]

Looks to me like they are only testing the forklift arms.

-Rob V.



Rob V. Nacra 5.2 Panama City
Re: AC72 Oracle Team USA Spaceship has landed [Re: P.M.] #260929
07/03/13 05:18 PM
07/03/13 05:18 PM
Joined: Aug 2007
Posts: 3,969
B
brucat Offline
Carpal Tunnel
brucat  Offline
Carpal Tunnel
B

Joined: Aug 2007
Posts: 3,969
I'm sure very, very few people ever imagined a winged keel (AUS in Newport), let alone foiling a 72-foot boat of any kind, let alone a cat in the America's Cup. Makes you wonder what kind of innovations are in store over the next 30 years...

Mike

Re: AC72 Oracle Team USA Spaceship has landed [Re: P.M.] #260930
07/03/13 05:57 PM
07/03/13 05:57 PM
Joined: Dec 2006
Posts: 2,490
On the Water
P.M. Offline OP
Pooh-Bah
P.M.  Offline OP
Pooh-Bah

Joined: Dec 2006
Posts: 2,490
On the Water


Philip
USA #1006
Re: AC72 Oracle Team USA Spaceship has landed [Re: Isotope235] #260938
07/04/13 05:27 AM
07/04/13 05:27 AM
Joined: Jun 2001
Posts: 12,310
South Carolina
Jake Offline
Carpal Tunnel
Jake  Offline
Carpal Tunnel

Joined: Jun 2001
Posts: 12,310
South Carolina
Originally Posted by Isotope42
Originally Posted by mbounds
Now this just impresses the hell out of me. That's some serious laminate engineering.

Correct me if I'm wrong, but isn't that testing the load in the wrong direction?


No. The rudders pull the stern down to give the daggerboards an increased angle of attack so the boards will generate more lift. They also pull down in the most extreme case when the bows start getting pushed down.


Jake Kohl
Re: AC72 Oracle Team USA Spaceship has landed [Re: P.M.] #260939
07/04/13 05:28 AM
07/04/13 05:28 AM
Joined: Jun 2001
Posts: 12,310
South Carolina
Jake Offline
Carpal Tunnel
Jake  Offline
Carpal Tunnel

Joined: Jun 2001
Posts: 12,310
South Carolina
Originally Posted by mummp


Well, now I don't know who to believe. However, one would think that if they had unanimous consent, given all of the America's cup history, someone would have thought to have the teams sign something.


Jake Kohl
Page 33 of 202 1 2 31 32 33 34 35 201 202

Moderated by  Damon Linkous 

Search

Who's Online Now
1 registered members (Ron Holm), 26 guests, and 104 spiders.
Key: Admin, Global Mod, Mod
Newest Members
toomanyhulls, madina9900, johngava, badcatsailor, wehnet
8119 Registered Users
Top Posters(30 Days)
Forum Statistics
Forums26
Topics22,397
Posts267,040
Members8,119
Most Online1,650
Sep 10th, 2019
--Advertisement--
Powered by UBB.threads™ PHP Forum Software 7.7.1