Luna Rossa Challenge. AC 37

E

enigmatically2

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Stingray~ said:
e2 will hopefully chime in. 

A related question, we do have iteration 1 of the AC75V2 DR, is there a spec somewhere that describes the AC40 accurately including development limits? 
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I have not seen my restrictions on numbers of mainsails or foils this time around. I have not seen the AC40 rule but as there seems to be no restrictions on ac75 it would be strange if there were any on test boats.

If anyone wishes to double check or poi t out my mistake please do. Haven't had chance to read word by word

 
C

Chobani Sailor

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enigmatically2 said:
I have not seen my restrictions on numbers of mainsails or foils this time around. I have not seen the AC40 rule but as there seems to be no restrictions on ac75 it would be strange if there were any on test boats.

If anyone wishes to double check or poi t out my mistake please do. Haven't had chance to read word by word
Click to expand...
4 Component limits and modifications
4.1 Key components of AC75 Class Yachts and LEQ12 yachts are restricted in quantity and degree of modification.
Any listed component that serves or partly serves the purpose of a listed component shall be
counted, where:
(a) a component launched on an AC75 Class Yacht or a surrogate yacht shall be treated as an AC75
Class Yacht component; and
(b) a component launched on an LEQ12 yacht shall be treated as an LEQ12 yacht component.
4.2 As an exception to Rule 4.1, unmodified AC40 Class Yacht supplied components are not counted in the
quantity limits imposed by these Rules if they are installed on an unmodified AC40 Class Yacht hull. However,
if:
(a) an AC40 Class Yacht supplied component is modified outside the scope of any modifications permitted
in the AC40 Class Rule; or
(b) installed on any yacht except an unmodified AC40 Class Yacht hull;
and launched, it is then treated as a new LEQ12 yacht component.
4.3 For an AC75 Class Yacht, the components in the table below are restricted in quantity and degree of
modification.
Component Legacy
quantity
Legacy
immutable
portion
New
quantity
New
immutable
portion
Total
quantity
Hull surfaces 1 87.5% area* 1 87.5% area 2
Foil arm stocks 4 100% mass 4 100% mass 4
Foil wings 2 100% mass 3† 80% mass 5
Foil flaps 2 100% mass 5‡ 80% mass 7
Rudders 2 80% mass 2 80% mass 4
Mast tubes 1 See Rule 4.11 2 80% mass 3
Mainsail skins 8 85% area 12 85% area 20
Jib skins 10 85% area 15 85% area 25
*See Rule 4.8. †See Rule 4.9. ‡See Rule 4.10.
4.4 For an LEQ12 yacht, all components launched after 17th March 2021 shall be counted in the applicable
limits. The components in the table below are restricted in quantity and degree of modification.
Component New
quantity
New immutable
portion
Hull surfaces 1 87.5% area
Foil arm stocks 2 80% mass
Foil wings 4 80% mass
Foil flaps 4 80% mass
Rudders 1 80% mass
Mast tubes 1 80% mass
Mainsail skins 8 85% area
Jib skins 10 85% area
AC

 
C

Chobani Sailor

Anarchist
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Not In Your Basement
Chobani Sailor said:
4 Component limits and modifications
4.1 Key components of AC75 Class Yachts and LEQ12 yachts are restricted in quantity and degree of modification.
Any listed component that serves or partly serves the purpose of a listed component shall be
counted, where:
(a) a component launched on an AC75 Class Yacht or a surrogate yacht shall be treated as an AC75
Class Yacht component; and
(b) a component launched on an LEQ12 yacht shall be treated as an LEQ12 yacht component.
4.2 As an exception to Rule 4.1, unmodified AC40 Class Yacht supplied components are not counted in the
quantity limits imposed by these Rules if they are installed on an unmodified AC40 Class Yacht hull. However,
if:
(a) an AC40 Class Yacht supplied component is modified outside the scope of any modifications permitted
in the AC40 Class Rule; or
(b) installed on any yacht except an unmodified AC40 Class Yacht hull;
and launched, it is then treated as a new LEQ12 yacht component.
4.3 For an AC75 Class Yacht, the components in the table below are restricted in quantity and degree of
modification.
Component Legacy
quantity
Legacy
immutable
portion
New
quantity
New
immutable
portion
Total
quantity
Hull surfaces 1 87.5% area* 1 87.5% area 2
Foil arm stocks 4 100% mass 4 100% mass 4
Foil wings 2 100% mass 3† 80% mass 5
Foil flaps 2 100% mass 5‡ 80% mass 7
Rudders 2 80% mass 2 80% mass 4
Mast tubes 1 See Rule 4.11 2 80% mass 3
Mainsail skins 8 85% area 12 85% area 20
Jib skins 10 85% area 15 85% area 25
*See Rule 4.8. †See Rule 4.9. ‡See Rule 4.10.
4.4 For an LEQ12 yacht, all components launched after 17th March 2021 shall be counted in the applicable
limits. The components in the table below are restricted in quantity and degree of modification.
Component New
quantity
New immutable
portion
Hull surfaces 1 87.5% area
Foil arm stocks 2 80% mass
Foil wings 4 80% mass
Foil flaps 4 80% mass
Rudders 1 80% mass
Mast tubes 1 80% mass
Mainsail skins 8 85% area
Jib skins 10 85% area
AC
Click to expand...
that didn't paste good.  standby

 
C

Chobani Sailor

Anarchist
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image.png

 
E

enigmatically2

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So if I read that right: if you modify an AC40 foil within AC40 rule then that doesn't count. If you modify it outside that rule then it counts as one of your AC75 parts.

But LEQ12 parts have a separate limit. So if you have one boat of each you can test more parts.

Seems a no brainer to go for one of each boat if you have the money

 
A

accnick

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Chobani Sailor said:
I think there is a typo though on the Foil Arm stocks - legacy quantity 4, new quantity 4, Total quantity 4.  I assume that is suppose to be 8
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Not necessarily. By the existing wording, you can have a total of four, which can be any combination of new and old. If it is as you suggest, a total of eight stocks, existing teams could have a significant advantage, assuming that new foil stocks are identical to the ones used in AC 36.

With a total of eight foil stocks, you could build out and swap more foils more easily during development. A new team could never have more than four stocks in total, as they would have no source of legacy stocks.

You may be right, but I can see the logic of the way it is written.

 
A

accnick

Super Anarchist
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Stingray~ said:
Stocks meaning arm fairings?
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The foil arm stock is the one-design supplied structural armature for the foil. It's what everything is built on, and is the component that was so late and so problematic in AC 36.

"11.46      Foil arm stock
A supplied component forming the structural spar of a foil arm combined with a leading edge. The items included in the foil arm stock are defined in the AC75 One Design Foil Arm Assembly drawing."

The leading edge was a one-design component that was typically bonded onto structural stock by the teams last time because of delivery issues.

I have not seen the new foil arm assembly drawing referenced in the Tech Regs.
 

 
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Stingray~

Stingray~

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accnick said:
The foil arm stock is the one-design supplied structural armature for the foil. It's what everything is built on, and is the component that was so late and so problematic in AC 36.

"11.46      Foil arm stock
A supplied component forming the structural spar of a foil arm combined with a leading edge. The items included in the foil arm stock are defined in the AC75 One Design Foil Arm Assembly drawing."

The leading edge was a one-design component that was typically bonded onto structural stock by the teams last time because of delivery issues.

I have not seen the new foil arm assembly drawing referenced in the Tech Regs.
 
Click to expand...
Thanks, yes I should not have included the word ‘fairings’ since trailing fairings off the stocks were the source of much intrigue during AC36 and the trailing fairings had a degree of variability. 
 

I wish the leading edge was left open to a degree of design in AC37; maybe next time. 

 
shebeen

shebeen

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Chobani Sailor said:
I am retracting my S&S entry suggestion.  It was based on the number of AC40s that had been order.  In the end, TNZ has 2 AC40s in the pipeline, Ineos has 1 AC40 in the pipeline(they are building their own test boat), Alinghi has 2 AC40s in the pipeline and initially I was told that LR was buying 1 AC40.  When another AC40 was place they thought it was going to S&S but instead it was LR putting in an order for a second AC40. 

I don't know what the deliverable dates are on these but I can see a cluster f of a problem if there are any delays in the construction of these at McConnaghy in China - some teams getting theirs well in advance of others and thus getting more time to test foil packages before committing to their AC75 Foils.   Everyone knows how the Foil Arm construction went in AC36.

Therefore, we have NZ, Ineos, Alinghi, and LR confirmed.
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So an issue for AM?

Or any potential new team

 
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buckdouger

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Was curious if there may likely be a relationship between Ruggero Tita and Caterina Banti and Luna Rossa. Presumably they are training in Cagliari for a next Olympic campaign. I have lost track of when the next AC may be - but if it isn't 2024, might we see them on LR? Are they well regarded by the team?

 
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