Volvo 70 Design Rule-- 2011-2012 Race

[Doug Lord]

With the success of the curved daggerboards on V3 in the BWR I was wondering if the new V70-'s will be able to use daggerboards like that.
No mention here: http://volvooceanrace.com/race/Boat-Design/4
But see the rule below:

From the rule:
" Daggerboards shall have a lateral angle relative to the centerplane of the boat not greater than 30 degres measured between any two points in a plane parallel to the maximum thickness of the daggerboard." I think that means yes except the angle of incidence of the lifting portion board could not be adjusted because additional rotation is not permitted. Hmmmm...

Look closely at the picture-appears to show a curved board(click on image):

[Doug Lord]

from Scuttlebutt tonight:

PUMA'S MAR MOSTRO SEES THE LIGHT OF DAY
By Ken Read, Skipper, PUMA Ocean Racing

As a team, about a year ago we set May 1, 2011, as our date to have PUMA's
new Volvo Open 70 in the water sailing. The fact that we are closing in on
that date and it looks as if we'll meet our goal is practically a miracle.
There are typically a million reasons during a boat build to continually
move the schedule backwards -- all good reasons, by the way. But, the build
team refused to buckle under, and everyone has double shifted for nearly
the entire build and worked around the clock for the last six weeks to make
sure that our sailing date would be met without a loss of quality.

What did this extraordinary effort give us? Lots and lots of design time.
We started the build as late as possible to give the Juan K (design) office
several weeks more than our schedule allowed, which immediately put our
build team under the gun. Hopefully it was time well spent -- we certainly
think so. Yet even with all that design time, our boat will be the second,
third generation V-70 in the water. Fantastic!

This is certainly the week to praise our 40+ person build team lead by
Brandon Linton, Tim Hacket and their spectacular construction "swat team,"
as well as the entire work force and management group at New England
Boatworks. Brad Jackson has been a fantastic build coordinator from the
sailing side, working daily with Nahuel Wilson from the Juan K office on
every single detail on the boat. As I have said before, these races are won
or lost before the start. Our entire build team has done their job
amazingly well, now it's up to the sailors to keep the momentum going.

As we stand here on Monday, April 26, we have a complete Volvo Open 70.
Over the next week, the entire team (both shore and sailing) will put the
finishing touches on Mar Mostro. The boat has moved today from the low roof
"building" shed to a high roof "finishing" shed to have the keel put on and
the remaining big bits and pieces installed. Later this week, the completed
boat will come out of the high roof shed to have the mast stepped. And
after a "thank you party" for all the builders and suppliers and a day or
so of stress tests, we get to go sailing early next week.

I have to admit, we're all antsy to get on our new boat. The final few
build weeks is always hard on the team. Each of the sailors has their area
of expertise and they're all dying to get on our new toy to try everything
out. In a little over a week, we'll start the process of testing this
amazing new piece of hardware and try to prove whether this boat will live
up to very lofty expectations. -- Read on:
http://www.puma.com/sailing/news/the-light-of-day

Photos: http://tinyurl.com/FB-042511

Volvo Ocean Race begins in Alicante, Spain on October 29, 2011. Event
website: http://www.volvooceanrace.com/

click on image:

[Doug Lord]

Team New Zealand-Camper: http://volvooceanrace.com/news/CAMPER-rolls-out/3059

[Doug Lord]

from Scuttlebutt tonight:

(April 26, 2011) - With 186 days to go until the Volvo Ocean Race
2011-2012 kicks off in Alicante, the new Spanish Volvo Open 70 "Telefónica"
has left the King Marine shipyard this morning, where it was built over
approximately 40,000 hours with a team of over 28 builders and 19 designers
in the region of Valencia in Spain. The Juan Yacht Design studio, based in
Valencia and lead by Argentina's Juan Kouyoumdjian, were in charge of the
design of the new boat for the Spanish team directed by Pedro Campos. --
Full report: http://tinyurl.com/TT-042611


VOLVO OPEN 70 “TELEFÓNICA”

Team: Team Telefónica
Country: Spain
Club: Real Club Náutico de Sanxenxo and Real Club de Regatas de Alicante
Clubes: Real Club Náutico de Sanxenxo

CEO: Pedro Campos
Skipper: Iker Martínez
Technical Director: Horacio Carabelli

Boat: “Telefónica”. Volvo Open 70 – version 3
Sail number: ESP - 1
Designer: Juan Kouyoumdjian
Shipyard: King Marine (Alginet, Valencia)

Length: 21.5 metres (70 feet)
Beam: 5.70 metres
Mast height: 31.6 metres (the equivalent of a ten-storey building)

Mainsail: 175 m2
Jib: 135 m2
Spinnaker: 500 m2 (the equivalent of two tennis courts)

Displacement: 14,500 kg
Max weight: 14,500 kg
Bulb weight: 5,500 kg
Keel weight: maximum 7,400 kg

Swinging keel to 40º angle
Daggerboards:2
Number of sails: 17 total (maximum of 9 on board)
On board cameras: 5
On board microphones: 3
Crew: 10 sailors + 1 media crew member
Wheels (rudder): 2
Grinders: 3
Build: approximately 40,000 shipyard hours. 28 people

[bobothehobo]

To answer your original question, the VO70 rule precludes the use of curved foils however you will see at least one of those boats with the foils angled inboard...

[Doug Lord]

Originally Posted by bobothehobo

To answer your original question, the VO70 rule precludes the use of curved foils however you will see at least one of those boats with the foils angled inboard...

=====
Thanks-you may be right but the rule quoted in the first post does not seem to preclude curved foils: it says the angle of any foil relative to the center plane must not exceed 30 degrees measured between any two points which sounds like a limitation to control a curve-not eliminate one.
Also, if you click on the illustration in the first post it gets bigger and you can clearly see a curved foil...
I drew a curved foil that meets the specific wording of the rule.....
So, just out of curiosity, on what basis do you say the rule "precludes the use of curved foils" ?
The only thing I can see is that the rule prohibits the rotation that would be required to adjust the angle of incidence of the lifting portion of a curved foil-which is one of their great advantages over straight angled foils-and that leaves very little to choose from between a curved foil and straight angled foil.
From a lift standpoint 30 degrees could be quite usefull if the bottom of the straight foil was angled in towards the centerline......

[bobothehobo]

Hi Doug, you noted 6.2.4 correctly but missed:

6.2.1 "Daggerboards shall retract and extend only and shall not be designed to twist or rotate through the action of retraction or extension, nor rotate when under load"

http://volvooceanrace.com/media/file...endment-21.pdf

Page 24

[Doug Lord]

Originally Posted by bobothehobo

Hi Doug, you noted 6.2.4 correctly but missed:

6.2.1 "Daggerboards shall retract and extend only and shall not be designed to twist or rotate through the action of retraction or extension, nor rotate when under load"

http://volvooceanrace.com/media/file...endment-21.pdf

Page 24

---------------------
No, I don't think I missed that at all-in fact I quote it as a reason that the angle of incidence of the curved foil can't be adjusted.
You're not saying that the retraction of a curved foil causes rotation or twisting, are you?
Though, now that you mention it, I guess a case could be made for that since the board is moving along the radius of a curve. Too bad if thats the interpretation-it leaves Volvo 70 design somewhat backwards compared to Open 60 design..... Still, that doesn't explain the curved foil shown in the illustration?
I noticed the foils on Camper-tilted inboard at the top in the "traditional" way so that the board is vertical at X angle of heel- no vertical lift at all.

[bobothehobo]

Hi Doug,

"You're not saying that the retraction of a curved foil causes rotation or twisting, are you"

I am not saying that, Geometry is.

"I guess a case could be made for that since the board is moving along the radius of a curve."

Correct.

As far as the illustration goes, it is an illustration, I cannot comment on the artist's interpretation of a VO70.

[Doug Lord]

Originally Posted by bobothehobo

Hi Doug,

"You're not saying that the retraction of a curved foil causes rotation or twisting, are you"

I am not saying that, Geometry is.

"I guess a case could be made for that since the board is moving along the radius of a curve."

Correct.

As far as the illustration goes, it is an illustration, I cannot comment on the artist's interpretation of a VO70.

--------

Bobothehobo, you may be right but it sure is unfortunate if you are.
PS- it seems like a real stretch to say the retraction or insertion of a board into a slightly curved trunk that is limited to 30 degrees of angle measured between any two points is "rotation".....

[bobothehobo]

Hi Doug,

A curved board moving vertically in a trunk is going to rotate, doesn't matter how much.

Curved boards is exactly what they are trying to eliminate in the rule. You can argue with the rule makers, they must have made a decision versus cost and decided they did not want teams experimenting with curved foils. Just with the straight foils, there were teams that built and discarded many daggerboards last go around.

[bobothehobo]

Hi Doug,

Pictures of Puma's boards are here...

http://www.georgebekris.com/Boats-Sk...465755_SWDtQrB

Cheers,

Bobo

[Doug Lord]

Thanks, Bobo-they look like they are angled out at the top. Must be deisigned for some vertical lift.....

click on image:

Puma 1st sail--(George Bekris photo from SA)

[Doug Lord]

From Scuttlebutt tonight:

Led by skipper Franck Cammas, Groupama 4, the first Volvo 70 built in
France, was launched May 14th opposite Groupama Sailing Team's base in
Lorient, France. Sail trials of the Juan Kouyoumdjian design VO 70 are to
begin on May 17 for the sailing crew, with plans to compete in the Fastnet
Race in the UK on August 14. -- Full report: http://tinyurl.com/GC-051511

[Doug Lord]

from The Daily Sail:

Abu Dhabi Tourism Authority today unveiled the Abu Dhabi Ocean Racing team’s state-of-the-art Volvo Open 70 racing yacht in Portofino, Northern Italy.
The yacht was developed by Farr Yacht Design and built by Italy’s Persico S.p.A, in Bergamo. Conceived in March 2010, it is the combination of more than 7,000 design and 49,000 build hours.

The new VO70's black hull is emblazoned with a striking falcon, the national emblem of the United Arab Emirates of which Abu Dhabi city is the capital, soaring across its bow and main sails.

“We have invested in the very best yacht design and build technology available to underpin the expertise of the highly-skilled Abu Dhabi Ocean Racing team we have formed,” said His Highness Sheikh Sultan bin Tahnoon Al Nahyan, Chairman, ADTA and Team Principal, Abu Dhabi Ocean Racing. “This level of commitment is a clear signal of our intention to deliver a first-class performance in our debut Volvo Ocean Race and in our podium ambitions.”

Pictures: Abu Dhabi Ocean Racing and The Daily Sail-click on image: