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Re: AC72 Oracle Team USA Spaceship has landed [Re: P.M.] #255543
12/06/12 07:50 PM
12/06/12 07:50 PM
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Sebring, Florida.
Timbo Offline
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American Airlines Pilots made one too, I'll see if I can find it.

Here it is: http://www.youtube.com/watch?v=lu42f-pHClw


Blade F16
#777
-- Have You Seen This? --
Re: AC72 Oracle Team USA Spaceship has landed [Re: P.M.] #255580
12/08/12 11:40 AM
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She passed the test.


Philip
USA #1006
Re: AC72 Oracle Team USA Spaceship has landed [Re: P.M.] #255582
12/08/12 01:24 PM
12/08/12 01:24 PM
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W
waynemarlow Offline
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So at best vmg of 42 knots, that makes the Tractor still probably not as fast as the current crop of Tri's which I think are averaging around 38 knots for 24 hours at a time ?

Last edited by waynemarlow; 12/08/12 01:29 PM.
Re: AC72 Oracle Team USA Spaceship has landed [Re: P.M.] #255583
12/08/12 01:26 PM
12/08/12 01:26 PM
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Northfield Mn
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That jib looks like a hanky when they pan back. Kinda makes you wonder if there is a point they'd just drop it?


I'm boatless.
Re: AC72 Oracle Team USA Spaceship has landed [Re: waynemarlow] #255592
12/08/12 10:20 PM
12/08/12 10:20 PM
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South Carolina
Jake Offline
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Originally Posted by waynemarlow
So at best vmg of 42 knots, that makes the Tractor still probably not as fast as the current crop of Tri's which I think are averaging around 38 knots for 24 hours at a time ?


Designing a boat for 80% reaching and designing a boat for refined windward leeward are two very different things.


Jake Kohl
Re: AC72 Oracle Team USA Spaceship has landed [Re: P.M.] #255810
12/19/12 08:14 PM
12/19/12 08:14 PM
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The latest from the Oracle camp


Philip
USA #1006
Re: AC72 Oracle Team USA Spaceship has landed [Re: P.M.] #255811
12/19/12 08:17 PM
12/19/12 08:17 PM
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What to do when your 30 days are used up . . . .


Philip
USA #1006
Re: AC72 Oracle Team USA Spaceship has landed [Re: P.M.] #255813
12/20/12 03:01 AM
12/20/12 03:01 AM
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japan
erice Offline
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or17 is going back together with good stiff looking beams

hopefully she'll be flying again in feb.


eric e
1982 nacra 5.2 - 2158
2009 weta tri - 294
Re: AC72 Oracle Team USA Spaceship has landed [Re: P.M.] #255836
12/20/12 10:59 PM
12/20/12 10:59 PM
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Originally Posted by mummp
What to do when your 30 days are used up . . . .

O.K., this video has my curiosity up. The boat is a one design SL33, designed by Morrelli & Melvin and built by Hakes Marine . The video shows it foiling nicely, but it looks like it has a curved foil on port (windward hull) and "possibly" a L foil on starboard. Can't tell what the rudders are. Here are some pics of the SL33 foiling with a soft rig. Looks like it might be an S foil on the windward hull. Any body have any knowledge here?
[Linked Image]
[Linked Image]


Philip
USA #1006
Re: AC72 Oracle Team USA Spaceship has landed [Re: P.M.] #255851
12/21/12 02:59 PM
12/21/12 02:59 PM
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Posts: 3,224
Roanoke Island ,N.C.
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Originally Posted by mummp
Originally Posted by mummp
What to do when your 30 days are used up . . . .

O.K., this video has my curiosity up. The boat is a one design SL33, designed by Morrelli & Melvin and built by Hakes Marine . The video shows it foiling nicely, but it looks like it has a curved foil on port (windward hull) and "possibly" a L foil on starboard. Can't tell what the rudders are. Here are some pics of the SL33 foiling with a soft rig. Looks like it might be an S foil on the windward hull. Any body have any knowledge here?
[Linked Image]
[Linked Image]


Obfuscation. Public released video. I wouldn't rely to heavily on what you see.


"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.] #255852
12/21/12 03:08 PM
12/21/12 03:08 PM
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Posts: 307
maui
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maui
This isn't really knowledge but, apparently the 33's are test platforms and they are trying every type of foil they can think of on them. even the 72's have 2 different foils often.
from the photos it looks like the curved part of the foil is mostly in the hull when in the down position. the business end is an "L". the cant of the "L" is something to play with as are the tip foils shape/angle, etc.
Rudders have similar aspects to play with as well. it seems to me that an end plate on a daggerboard would help quite a bit to windward as well as become a hydro-foil off the wind. finding a happy medium between these 2 points of sail and the characteristics of the end plate would be a job, and require all sorts of testing.

there is some debate as to whether the extreme fineness ratio of the 72's may be fast enough to eliminate the need to fully foil in an upwind/downwind course with some 1-2 minute legs.

Re: AC72 Oracle Team USA Spaceship has landed [Re: jollyrodgers] #255882
12/23/12 08:36 AM
12/23/12 08:36 AM
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South Carolina
Jake Offline
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I really don't think we will see them foiling upwind. I think they'll use the foils to make the boat a little lighter in the water - but not foil born. Downwind, however, probably.


Jake Kohl
Re: AC72 Oracle Team USA Spaceship has landed [Re: Jake] #255887
12/23/12 07:45 PM
12/23/12 07:45 PM
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Posts: 307
maui
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maui
Originally Posted by Jake
I really don't think we will see them foiling upwind. I think they'll use the foils to make the boat a little lighter in the water - but not foil born. Downwind, however, probably.

Agreed, the no foiling to windward seems to be the consensus.
Most likely they are canting the lee board for sailing off the wind, which when combined with the wing tip or "L" gives the enough vertical lift to fully foil. Their speed may or may not increase, and their angle downwind may improve. Some speculation says both speed and angle will improve from foiling.
They are limited in the number of 72 dagger boards that they are allowed to make, but they can make as many SL33 or ac 45 dagger boards as they want to help figure this new development out. Mr. Melvin is on the design team for NZ so it makes sense for them to use the 33 as a test platform. Atrtemis focused on the big wing first and don't appear to be in agreement that fully foiling is the way to go.
the original mockup of the 72s showed banana boards, but i imagine that they work better on small cats that are crew weight trimmed, and big tris that have a regular board in the center hull. once they tried "L" and "T" foils they didn't look back.
can you imagine flying into the leeward gate at 40 knts., having to round up and crank the daggerboard to a de-canted position? what a learning curve this contest must have.
On the jibes it seems like they would set the new board before the jibe, but when 17 capsized going into their jibe they still had the 1 board up. if it had been down maybe both hulls would have been clear of the water and nosing in would not have been an issue.

Re: AC72 Oracle Team USA Spaceship has landed [Re: P.M.] #255899
12/27/12 06:59 AM
12/27/12 06:59 AM
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Dear Santa:
All I want for Christmas is a wing!


Philip
USA #1006
Re: AC72 Oracle Team USA Spaceship has landed [Re: P.M.] #255900
12/27/12 07:00 AM
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America's Cup in Photos


Philip
USA #1006
Re: AC72 Oracle Team USA Spaceship has landed [Re: P.M.] #255979
01/03/13 09:59 AM
01/03/13 09:59 AM
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Can't wait to see some video of Jimmy foiling the Moth.

New Years Resolution? . . . "keep the AC72 upright" . . .


Philip
USA #1006
Re: AC72 Oracle Team USA Spaceship has landed [Re: P.M.] #256086
01/09/13 07:00 AM
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Philip
USA #1006
Re: AC72 Oracle Team USA Spaceship has landed [Re: P.M.] #256303
01/15/13 11:29 AM
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ETNZ boat#2


Philip
USA #1006
Re: AC72 Oracle Team USA Spaceship has landed [Re: P.M.] #256652
01/28/13 04:20 PM
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Philip
USA #1006
Re: AC72 Oracle Team USA Spaceship has landed [Re: P.M.] #256656
01/28/13 05:01 PM
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Philip
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