What will AC75 v 2 look like

The_Alchemist

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You don’t design a boat in cfd it’s just code that tells you what the forces and moments are at a given speed.  They use cad to design the boat. Catia, solidworks, NX or rhino. You take the cfd hull results at different speeds, sinkages and trims and make a matrix of data points. You then make matrix’s of aero points and appendage points then you take all three and put it into a physics box like gomboc which is the simulator that most teams are using. That’s a simplified version of how they design a cup boat or an imoca or an ultime  
Great explanation, Mr Lead Designer!

 

Stingray~

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Why? Because you've heard of him but not the others? By any objective assessment, Marc Wintermantel has the strongest CV for the task in hand.
Yes, I guess that's why. Maybe the long-standing, traditional, highly-experienced crew has retired.

Okay, cool.

edited today at 15:27 on Saturday June 11 as a test
 
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Stingray~

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edit ability above, fwiw


edit: edited this one now at 8:45 am the next day. But the Edit button no longer appears on the post above (from Thursday) and so there must be some kind of Edit timeout still happening.
 
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dg_sailingfan

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Something that the Version 2 AC75 Boats have to address for AC37 is the "HUGE WIND SHADOW" they create. Aside from a handful of Races there was essentially no passing.

In fact if you combine Prada Cup Semifinal (4 Races), Final (8 Races) and AC Match (10 Races) in 18 of the 22 Races there were no passing.

Boring as hell if you just win the Start and then follow the Leader!
 

Forourselves

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Something that the Version 2 AC75 Boats have to address for AC37 is the "HUGE WIND SHADOW" they create. Aside from a handful of Races there was essentially no passing.

In fact if you combine Prada Cup Semifinal (4 Races), Final (8 Races) and AC Match (10 Races) in 18 of the 22 Races there were no passing.

Boring as hell if you just win the Start and then follow the Leader!
Because in each series there was one boat that was clearly faster than the other.
 

Stingray~

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In the BA interview whose link you posted, he predicts cyclors are a done deal for all teams.
Yep, he did.

Interesting to read Carr's take on it, he says cycling is way more fun to work up than grinding in a gym. There is also this,

“You just have to look on Strava (the fitness measuring app) and you will see that there are lots of America’s Cup grinders doing a lot of miles on their road bikes at the moment.”
 

shebeen

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Yep, he did.

Interesting to read Carr's take on it, he says cycling is way more fun to work up than grinding in a gym. There is also this,

“You just have to look on Strava (the fitness measuring app) and you will see that there are lots of America’s Cup grinders doing a lot of miles on their road bikes at the moment.”
it's a no brainer surely. more power, head up and out hands free.

I'm not sure who it was exactly, but there's a story from AC35 where one of the kiwi grinders went home for christmas. Family were getting worried about how much time he was spending on his bicycle, seemed like he had picked up this new hobby too easily and putting his pro sailing career in jeopardy.
 

The_Alchemist

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This is from the AC40 thread.

NZ states that they:

“We didn’t hold back on the design, we took the IP of Te Rehutai (the Cup winning boat from AC36) and translated it into the best 40-footer we could create.”

.......

“It’s a step on in terms of hull form from the Cup winning design of Te Rehutai, that adheres to all the fundamental rule changes implemented for the AC75s and we’re looking at performance estimates way in excess of our training boat, Te Kahu, or any of the other teams’ test mules that they ran in the lead up to AC36.”Richard Meacham,

.......

With that in mind, does the AC40 design give some insight into the next AC75 optimization. The AC40 was designed with the changes to the AC75 rules in mind. There is a link posted to some of the latest information (thx Horn Rock for the link), the first AC40 will be delivered soon. I have also include full scale pictures from the link.

Maybe this can be another start for a "what will the next AC75 look like". Of course the AC40 is somewhat simplified so it can be mass produced and broken down for shipment around the world, but it does give some insight into what NZ thinks is the next iteration in design.


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Screen Shot 2022-07-15 at 8.50.35 PM.jpg


What do you think about the design?
 

Sailing Fan

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This is from the AC40 thread.

NZ states that they:

“We didn’t hold back on the design, we took the IP of Te Rehutai (the Cup winning boat from AC36) and translated it into the best 40-footer we could create.”

.......

“It’s a step on in terms of hull form from the Cup winning design of Te Rehutai, that adheres to all the fundamental rule changes implemented for the AC75s and we’re looking at performance estimates way in excess of our training boat, Te Kahu, or any of the other teams’ test mules that they ran in the lead up to AC36.”Richard Meacham,

.......

With that in mind, does the AC40 design give some insight into the next AC75 optimization. The AC40 was designed with the changes to the AC75 rules in mind. There is a link posted to some of the latest information (thx Horn Rock for the link), the first AC40 will be delivered soon. I have also include full scale pictures from the link.

Maybe this can be another start for a "what will the next AC75 look like". Of course the AC40 is somewhat simplified so it can be mass produced and broken down for shipment around the world, but it does give some insight into what NZ thinks is the next iteration in design.


View attachment 528767

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What do you think about the design?
Aerodynamically it's terrific, the design creates an instant impression of speed, style & elegance.
 

The_Alchemist

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ETNZ_HH_201119_18396-2048x2048-1-1.jpg

1657948101017.png

The AC40 appears to get flatter closer to the bow than the V2 AC75. It looks very different than their test boat:
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The back doesn't look as flat as the V2 AC75 and the "pregnant belly" looks to be added again:

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Stingray~

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Yet another absurd turn for the cup under Kiwi stewardship...
It could actually turn out to be good for us fans; which may be a big push behind it from ETNZ's side since the product may be sellable as a 'Sail To Survive' series.

But yes, there are many possible issues with it too and there is a thread somewhere here (didn't try find it) where some posts suggest those issues.

Something new here is this part, which tells us there is absolutely zero 'independence' of the Spy Masters, which will of course lead to speculation about how tight-lipped the teams are being, relative to each other.

The Spy Masters (officially known as the "Recon Management Panel")



  • Emirates Team New Zealand: Ray Davies
  • INEOS Britannia: Ben Cornish
  • Alinghi Red Bull Racing: Rodney Ardern
  • Luna Rossa Prada Pirelli: Matteo Plazzi
  • NYYC American Magic: Brit Ward
 

Liquid

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Sure, it's about the fans... or NZ is trying to make it as OD as they can.

Now money will be spent creating fake things to hide the real things. Look > a puppy!

Special glass will be installed on the $2M foiling thingies that will blur the image of the competitors until approved by the panel...


Gone are the days of scuba diving under the skirts!
 
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