Luna Rossa Challenge. AC 36

Zaal

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27.png

Funny, two 27 on board ;)  

 

NZK

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Nah, the flat blanket below it - hiding the “boom” surrogate, I suppose
Looks like a big sling they use to crane the mainsail on/off the boat - kinda like a stack-pack/lazybag except removable. They use similar things a lot for superyacht sail installs/removals...

 

Zaal

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Three new videos by Justin Mitchell. Close racing with AM. At the end of video 84 there is a sort of  "speed test". My opinion is that LR is faster in a straight line, but AM tacks and gybes more dry. LR sometime touch the water in the last part of the tack / gybe, after going on the two foils, when is back on one foil only. AM had more time on the water, so maybe it's just practice. Or maybe is a trade-off of the new LR B2, that seems also to fly even, not too much bow down, and not overheeled compared to B1. Strange, because what Max and Bertelli always said is that all the boats will have pretty much the same top speed, and the key element to win will be stability and maneuvers. Maybe they need just more time on the water. 

 

enigmatically2

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Three new videos by Justin Mitchell. Close racing with AM. At the end of video 84 there is a sort of  "speed test". My opinion is that LR is faster in a straight line, but AM tacks and gybes more dry. LR sometime touch the water in the last part of the tack / gybe, after going on the two foils, when is back on one foil only. AM had more time on the water, so maybe it's just practice. Or maybe is a trade-off of the new LR B2, that seems also to fly even, not too much bow down, and not overheeled compared to B1. Strange, because what Max and Bertelli always said is that all the boats will have pretty much the same top speed, and the key element to win will be stability and maneuvers. Maybe they need just more time on the water. 
I'm not convinced. Initially after AM tacks, LR is faster yes. Then AM gets up to speed and they seem more equal, then the angles change, AM is pointing higher than LR so you can't judge. Then after they tack again, they both bear away for downwind bit and AM seems to be pointing more downwind.

So although LR may appear at first sight faster, she may not be, and her VMG may certainly be worse

 

buckdouger

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Interesting detail with the deck hollows where the rudder assembly diagonal struts come down - similar issues of superposition for foil to arm juncture?

Ah, it's a padded cover they put down to protect the deck when they're not sailing. It''s feature-less underneath:

View attachment 406598

They have a foredeck cover too:
 
Have we seen such nice foot camber on the boomed setups? 

right hand one is 17, not 27 I think
Larry..

 

The_Alchemist

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From one of Weta27 pics, you can see that they didn't extend the keel modification (blade) all the way back. 

LR2 keel mod 2.jpg

Can you imagine the discussions that took place before they did this?

How is the performance of the new hull?  Great, but we need to cut it in half and add a few millimeter blade down the center...

 

Zaal

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Turbulators, they copied INEOS again. Either that, or there’s an infestation of the dreaded Kiwi carbon-eating mole
Yes, could be. Just 2 ? Ineos has 4 each side. Maybe is the caterpillar, magneto hydro-dynamic propulsion, like in "The hunt for Red October" ;)  

 

JALhazmat

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From one of Weta27 pics, you can see that they didn't extend the keel modification (blade) all the way back. 

View attachment 406623

Can you imagine the discussions that took place before they did this?

How is the performance of the new hull?  Great, but we need to cut it in half and add a few millimeter blade down the center...
Doesnt the rotation point of the arms have to sit a fixed point above the bottom of the boat?  

“quick stick a bit on the bottom before the come back and measure it again... “

 

enigmatically2

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Stick on keel, turbulator/ion drive vortex technology... wonder if they are going to ask Ferrari to build some foils next 
Well if NYYC go down the same route their motorsport experts will be asking when the Kiwis are going to put the banking in on the corners so that the yachts can turn

 
Doesnt the rotation point of the arms have to sit a fixed point above the bottom of the boat?  
Figure 13.1 : Foil geometry ~

Foil cant axis 520 mm (+/- 3 mm) above measurement water plane (MWP).

Cant cylinder mount 90 mm (+/- 3 mm) below MWP.

~ bottom (fairbody at centreline) of boat is is not measurement constrained.

 

Horn Rock

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LRB2a.jpg

At least a dozen "No step" signs on LR. Bit of a minefield.......Structurally it looks to be all or nothing........Curious as to what the vertical ribbing in the forward cockpits are? They're symmetrical - on both sides. Does it imply there's heat coming from something?.......... Note the two temporary winches straddling the mast. Not there when sailing. 

So instead of a boom, do they have some sort of electromagnet system under the ramp to shape the main?

 

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