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performance #86816
10/17/06 05:46 AM
10/17/06 05:46 AM
Joined: Feb 2006
Posts: 3,348
F
fin. Offline OP
Carpal Tunnel
fin.  Offline OP
Carpal Tunnel
F

Joined: Feb 2006
Posts: 3,348
"In the end, it was compeling 2 weeks of training and racing against the best in the country vying for a spot on the 2008 Olympic Sailing Team to represent USA in Quindao, China. The drivers alone in the top 3 had 16 years combined racing together at a low average of 70 days a year racing, and another 20 plus in coaching. Thousands of hours testing and training to use this block or that line or this sail with only those battens in these 5 conditions....only etc. Just when you think that, "this" is "the" way to rig the boat or drive the boat...someone else says otherwise and has 40 hours of sailing and testing to prove it. And that comes from most of the teams during both Tornado events. With the top speed groove in the Tornado so small and at times so hard to find, there is very little forgiveness by the fleet when you are not in it...at times, that "out-the-groove" moment is just paralyzingly scarely. But when it is there, and you finish close to the pack...Wow, you now know, what fast really feels like; and it isn't always about pure speed. " - Mark Herendreen

Took the liberty of borrowing this from another forum. After all the preparation, his boat was damaged by a seal! WTF!

I didn't want to (continue to) hijack another thread. To be succinct: How fast is your boat? It is proportional to your committment.

In our sport there is much discussion of technological advancement and less notice paid to the increased skill of the sailors. I believe there is a cumulative effect over time. Or is it just a coincidence that our 10 time national Tornado Champions are coached by a 9 time champion? Probably not.

btw- I was just looking at some footage of this years Texel, and it looked like line honors went to a Tornado with dacron sails. Can anyone confirm?

Last edited by Tikipete; 10/17/06 06:27 AM.
-- Have You Seen This? --
Re: performance [Re: fin.] #86817
10/17/06 06:33 AM
10/17/06 06:33 AM
Joined: May 2003
Posts: 4,451
West coast of Norway
Rolf_Nilsen Offline
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You tease! <img src="http://www.catsailor.com/forums/images/graemlins/laugh.gif" alt="" />

I (still) believe it is down to the skill of the sailors, and time in the boat builds skill. You build skills faster if you use the time spent on the boat to train seriouosly instead of zipping around.
This summer I had the opportunity to talk with the skipper of the norwegian tornado in the '84 L.A 'games. He said that they had bin finishing in the middle of the pack for some years, until the spent a winter sailing the boat instead of putting it in storage. Then they jumped up to be a top ten finisher consistently. Time in the boat made all the difference for them. Same time at Kielerwoche the russian team came with some old worn out beater sails, but was still the fastest boat on the water due to time in the boat.

But from time to time there is a technical improvement, like the Gran Segel spis who blitzed the fleet at the Tornado worlds in Marthas Vineyard '02. Now everybody has moved to the same shape, or even more extreme variations of the same shape.

Re: performance [Re: Rolf_Nilsen] #86818
10/17/06 06:45 AM
10/17/06 06:45 AM
Joined: Jan 2005
Posts: 6,049
Sebring, Florida.
Timbo Offline
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Just wait until a Tornado shows up with Foils on it...

(Of course that's a joke)


Blade F16
#777
Re: performance [Re: Timbo] #86819
10/17/06 06:59 AM
10/17/06 06:59 AM
Joined: May 2003
Posts: 4,451
West coast of Norway
Rolf_Nilsen Offline
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West coast of Norway
Foils are not permitted on the T, but other platforms might see them <img src="http://www.catsailor.com/forums/images/graemlins/smile.gif" alt="" />

Re: performance [Re: Rolf_Nilsen] #86820
10/17/06 08:30 AM
10/17/06 08:30 AM
Joined: Jan 2005
Posts: 6,049
Sebring, Florida.
Timbo Offline
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I know Rolf, that's why I said it's a joke...Otherwise they would already have them.


Blade F16
#777
Re: performance [Re: Rolf_Nilsen] #86821
10/17/06 09:03 AM
10/17/06 09:03 AM
Joined: Jun 2001
Posts: 371
Michigan, USA
sparky Offline
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sparky  Offline
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Posts: 371
Michigan, USA
Quote
but other platforms might see them


Other than F16/Stealth, where might you expect to see foils?

Would you expect to see lifting foils?

The Stealth uses them on their rudders for stabilization of the platform which seems to be effective, but they don't try to lift the platform out of the water from what I can tell.

If you were to do a "clean sheet" approach to the F16, would you try to incorporate "lifting" foils?


Les Gallagher
Re: performance [Re: sparky] #86822
10/17/06 09:44 AM
10/17/06 09:44 AM
Joined: May 2005
Posts: 87
Trondheim, Norway
J
jimi Offline
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jimi  Offline
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Joined: May 2005
Posts: 87
Trondheim, Norway
Well, some crazy Swiss guys have done it on a 18 ft skiff, which should be harder than getting a catamaran foiling, as the cat has two hulls.. Check this link out:
http://video.google.com/videoplay?docid=-8295748797771264466&q=18ft+skiff&hl=en

Re: performance [Re: jimi] #86823
10/17/06 12:10 PM
10/17/06 12:10 PM
Joined: Mar 2002
Posts: 984
2017 F18 Americas Site
Dan_Delave Offline
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2017 F18 Americas Site
If they can get a skiff flying that well imagine what could be done with a catamaran. Maybe take something like the foil system from a trifoiler and mount it on my Tiger. I think they actually weight about the same. No need for the amas Greg K just mount it to the front crossbar. Keep the daggerboards where they are so it can be used in displacement mode as well.

Later,
Dan

Re: performance [Re: fin.] #86824
10/17/06 04:28 PM
10/17/06 04:28 PM
Joined: Jul 2001
Posts: 256
North Europe, Sweden, Uppsala
Hakan Frojdh Offline
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Hakan Frojdh  Offline
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North Europe, Sweden, Uppsala
Uni rigged M20 took place 1, 2 at Texel. They passed the Eagle 20 on the upwind. The M20's with jib (M20 GTI) came 4, 9 place.

/håkan

Re: performance [Re: Dan_Delave] #86825
10/18/06 07:16 AM
10/18/06 07:16 AM
Joined: Jun 2001
Posts: 371
Michigan, USA
sparky Offline
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Michigan, USA
My real question is,do you think lifting foils would make the boat quicker around the bouys?

Looking at that 18 Ft. Skiff video, I keep thinking that an identical boat without the lifting foils would be quicker around the bouys. They were on a close reach, probably looking to get maximum speed, but the drag of the foils made me think that even at that sailing angle, they might have been faster without the foils. In my opinion, in windward/leeward competitions, the foiler would be slower.

What Stealth do with the rudder foil looks much more promising to me and I would want to do it if "legal" within the class.


Les Gallagher
Re: performance [Re: sparky] #86826
10/18/06 09:09 AM
10/18/06 09:09 AM
Joined: May 2005
Posts: 87
Trondheim, Norway
J
jimi Offline
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jimi  Offline
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Trondheim, Norway
I don't think it's fair to make the 18 on this video represent foiling boats as they obviously had not worked out efficient foiling technique yet (like the guy who has to run forward to the bow every time they get foiling). Obviously foiling will decrease dramatically wetted surface, which is the biggest aspect in terms of friction forces on boats. So theoretically a foiling cat should be faster than a non foiling cat (duh:)). How much is yet to see, I will hopefully do some study on exactly this kind of stuff when I finish my Master degree in Marine Technology some five years from now:) However, foils sure made the Moths faster...

Re: performance [Re: jimi] #86827
10/18/06 10:01 AM
10/18/06 10:01 AM
Joined: May 2003
Posts: 4,451
West coast of Norway
Rolf_Nilsen Offline
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West coast of Norway
I am pretty sure lifting foils on a cat will make us even faster. And a catamaran is an ideal platform for foiling with its light weight and wide platform. There has been several tests with lifting foils on cats, and they are really fast when they get them to work. Dave Carlson (dacarls on this forum) has a webpage with lifting ladder foils in practical use.
But not everybody will think a foiling cat is still a cat, and do we really want to go in that direction? Lifting "banana" foils might be acceptable to most of us tough, and I think we will see them in common use soon.

Re: performance [Re: Rolf_Nilsen] #86828
10/18/06 10:23 AM
10/18/06 10:23 AM
Joined: Feb 2005
Posts: 1,382
Essex, UK
Jalani Offline
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Jalani  Offline
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Posts: 1,382
Essex, UK
Quote
....and I think we will see them in common use soon


Does this mean, Rolf, that we're about to see a semi-foiling Blade? <img src="http://www.catsailor.com/forums/images/graemlins/cool.gif" alt="" />


John Alani
___________
Stealth F16s GBR527 and GBR538
Re: performance [Re: Jalani] #86829
10/18/06 10:43 AM
10/18/06 10:43 AM
Joined: May 2003
Posts: 4,451
West coast of Norway
Rolf_Nilsen Offline
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Rolf_Nilsen  Offline
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West coast of Norway
Sorry John, there is just no time to develop them til Zandvoort. If I had time, I would have loved building and testing them. But the C-class have used them (Patient Lady 6) and other efforts are underway.

Re: performance [Re: jimi] #86830
10/18/06 11:05 AM
10/18/06 11:05 AM
Joined: Jan 2004
Posts: 330
S
srm Offline
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srm  Offline
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Posts: 330
One of the things that I have wondered about while watching all of these foiling craft is the effect of foiling on windward performance. When these boats are riding along, at times nearly the entire centerboard is out of the water. That's got to just about kill all of the lateral resistance. This is evident in the 18skiff video, when they get going, the boat heels to windward and the guys come running in off the wing. I guess it's part of the technique where the skipper trys to keep the hull just above the water surface, but it seems like they might benefit from putting more board below the foil, or moving the foil up higer on the board.

sm

Re: performance [Re: Rolf_Nilsen] #86831
10/18/06 11:39 AM
10/18/06 11:39 AM
Joined: Sep 2005
Posts: 1,187
38.912, -95.37
_flatlander_ Offline
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38.912, -95.37


John H16, H14
Re: performance [Re: _flatlander_] #86832
10/18/06 11:54 AM
10/18/06 11:54 AM
Joined: May 2002
Posts: 3,114
BANNED
MauganN20 Offline
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BANNED
boy that thing is OOGLY :P

Re: performance [Re: MauganN20] #86833
10/18/06 12:14 PM
10/18/06 12:14 PM
Joined: Mar 2002
Posts: 984
2017 F18 Americas Site
Dan_Delave Offline
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2017 F18 Americas Site
Maugan:

As cool as the TriFoiler looks now (my opinion) it was not the best looking girl in school when it was a prototype.

Later,
Dan

Re: performance [Re: srm] #86834
10/18/06 12:16 PM
10/18/06 12:16 PM

A
Anonymous
Unregistered
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Quote
One of the things that I have wondered about while watching all of these foiling craft is the effect of foiling on windward performance. When these boats are riding along, at times nearly the entire centerboard is out of the water. That's got to just about kill all of the lateral resistance. This is evident in the 18skiff video, when they get going, the boat heels to windward and the guys come running in off the wing. I guess it's part of the technique where the skipper trys to keep the hull just above the water surface, but it seems like they might benefit from putting more board below the foil, or moving the foil up higer on the board.

sm


When you heel to windward the foil gets more vertical providing lift to windward.

Re: performance [Re: Rolf_Nilsen] #86835
10/18/06 12:40 PM
10/18/06 12:40 PM
Joined: Sep 2005
Posts: 1,187
38.912, -95.37
_flatlander_ Offline
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38.912, -95.37
Quote
Lifting "banana" foils might be acceptable to most of us tough, and I think we will see them in common use soon.


And isn't this premise to increase speed by reducing the wetted surface of the leeward hull? And not fly it, which could result in nastier pitchpoles?

Quote
But not everybody will think a foiling cat is still a cat, and do we really want to go in that direction?


Which is why I posted the only foiling cat I could find. Not what I had in mind. The beach wheels and anti-pitch tabs are cool, eh? You're right Dan, it can only get better.


John H16, H14
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