What will AC75 v 2 look like

Schakel

Dayboat sailor
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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What do you think about the design?
Why long 75 footers, when you can foil?
In old times waterline length was strongly related to speed by various rules:
v_{{hull}}\approx 1.34\times {\sqrt  {L_{{WL}}}}
.
Once foiling it all doesn't mater any more.
Good thinking.

Starting to foil is another point. But hey: there are no 75 footers in the field.
Makes it less expensive.

In comparison to the Imoca's.
WiIl there be enough room for the design contest?
It looks almost like a strict class rule.

Mast with double slots for dual sail is real new.
Fantastic.
Mast new ac 40.png
 

atwinda

Anarchist
785
230
Why long 75 footers, when you can foil?
In old times waterline length was strongly related to speed by various rules:
v_{{hull}}\approx 1.34\times {\sqrt  {L_{{WL}}}}
.
Once foiling it all doesn't mater any more.
Good thinking.

Starting to foil is another point. But hey: there are no 75 footers in the field.
Makes it less expensive.

In comparison to the Imoca's.
WiIl there be enough room for the design contest?
It looks almost like a strict class rule.

Mast with double slots for dual sail is real new.
Fantastic.

What rock do you live under? You're saying these things as if they are some revelation.

Everyone has known since the foiling moth that hull length was no longer a factor in speed.

The AC40 is a strict OD rule for events. Outside of the events, the teams can develop a controlled number of foils and sail skins.

They are not comparable at all to an Imoca- not sure what you're even grasping at here. One is an offshore boat designed to partially foil (they still drag the stern in through the water), and the other is an in-shore race boat. Completely different design criteria.

Calling a mast with twin track "new" in a thread about ac 75 v2 differences just means you aren't following along at all. Each of the mules and test boats from the last cycle has twin skin setups. There were even some twin skin designs prior to that.
 

Liquid

NFLTG
4,442
738
Over there
WiIl there be enough room for the design contest?

The room is smaller when rig and sail development, selection and handling are removed from the equation.

It's now just down to:
  • Foil designs
  • Twin mainsail control system
  • Energy management
  • Maybe hull shape...?

What rock do you live under? You're saying these things as if they are some revelation.

Everyone has known since <snip>

Easy there Francis!

It's just the AC which is becoming more irrelevant with every cycle and another 'new' attempt to make it a mainstream goldmine...
 
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