Luna Rossa Challenge. AC 36
- Thread starter strider470
- Start date
WetHog
Super Anarchist
Considering AM and INEOS went towards LR with their second boat, based on comments coming out of LR, it’s clear LRs 6 month head start will be a huge task for the other two challengers to overcome. Probably why INEOS swung for the fences, again. Trying to catch up. Might be another AC34 LVC where the result is pre-determined where 1 challenger is so far ahead the rest are racing for the first loser.
WetHog
h34r:
WetHog
h34r: Again? Pray tell me: once the general concept (Jesus foils) is known, how is the keel/skeg decision tied to an advance knowledge of the Rule? I seriouly doubt ETNZ and LR deliberated for six months over itConsidering AM and INEOS went towards LR with their second boat, based on comments coming out of LR, it’s clear LRs 6 month head start will be a huge task for the other two challengers to overcome. Probably why INEOS swung for the fences, again. Trying to catch up. Might be another AC34 LVC where the result is pre-determined where 1 challenger is so far ahead the rest are racing for the first loser.
WetHog
Last edited by a moderator:
My impression too but it sure would be nice to see some overlapping lines of these hulls for this and other comparisons.
‘Sex-appeal’ wise Ineos is my favorite, the evolution of their underside from BR1’s bolt-on keelson to BR2’s impressive skison is a big, brave, bold, badass bet.
Last edited by a moderator:
MaxHugen
Super Anarchist
I constantly read posts claiming that this or that keel/skeg contributes to the end plate effect, but I have yet to find any description or diagram of how that is supposed to work. Although I understand how the deck/mainsail effect works, I'm struggling to see how a vertical keel helps this.
Overall this looks awesome. Keel does extend all the way aft now, don’t think LRB1 had that. In this aspect its similar to Ineos B2, apprently maximizing the end plate effect. AM keel tapers out and is much less deep
JALhazmat
Super Anarchist
Here another interview. This time double: Max Sirena and James Spithill talking. Jimmy (from 9:24) talks in english, so no need of translation, here's only Max answers.
- At first glance B2 could seem a "copy" of B1, but they designed both and B2 and they are quite different. The hull, the deck, the bow, the cockpit are different from B1. They were really happy about B1 - unlike some other competitors - that they wanted to develop and improve that design philosophy both in aerodynamics and hydrodynamics. They bettered also the internal control system, so B2 is very different from B1, but they are in the same family.
- Asked about AM and Ineos, he answer that they changed completely from their B1, maybe Ineos even more than the americans. he adds that it's up to them explaining why they did B2 completely different from B1, anyway he saw a lot of similarities with Luna Rossa B1, so it's clear that they took inspiration from it.
- Timetable for next days is complete all the structural checks (the last one, with the sails, Saturday or at least Sunday) and starting sailing and training by Monday. There's no much time, but they're confident to be ready for the first race.
- Lockdown and the cancellation of Cagliari and Portsmouth events put all the teams in the situation of designing B2 without a confrontation between the B1s. He's very happy about the last sailing period in Cagliari, they tried to push B2 design until the last moment. Now every team will try to sail near an opponent in the Hauraki Goulf trying to gain some information about boat speed and performance, since the Cup is won not only by by the best crew but also by the fastest boat.
- Asked about ETNZ, he answer that they haven't weak points. They are a great and tight knit group, representing a nation where everybody is a sailor, or was a sailor before. They play at home and they have also three month more to develop their B2. He expect something new and radical from them, cause they have a really smart design team and great sailors. At the same time, he thinks that whoever wins the Prada Cup will be a very strong opponent for them.
- Asked about the race courses, he say that he know pretty well the sailing conditions in Auckland, since this is his fourth Cup campaign there (2 with LR, then 1 with ETNZ, and now this one). the big difference from the past is that this time around they'll sail inside the islands. There is only one race course that is a little farther away, between Takapuna and Rangitoto. It's a quite gathered sailing area, so it will be possible for fans ashore to see the boats, and it's also quite difficult, because sailing through the islands there will be a lot of wind shifts. Cagliari was a perfect spot for training, because it was possible to sail in the open sea but also near Sella del Diavolo (edit: Devil's Saddle) where wind is strong and shifty.
- It was a very emotional day, splashing a boat so cutting edge and technologically advanced, so complex, so accurately designed and built. He repeats that it's difficult to see the difference with B1, but if someone could step on the boat he would realize that the accuracy of construction is incredible, Persico marine with LR design team did something incredible, a real work of art, he never saw an object so well built. So it was an emotional day, the boat is the result of three years of work for a Cup campaign that will be remembered forever for the worldwide Covid situation. They feel the responsability and the honour to represent Italy.
- He wanted the Cup to be broadcasted in Italy by the state Tv along with Sky and pay tv, so that everyone could see the races, he jokes that they'll have to get up 3 AM for watching it, but it's up to them make it worth with great performances on the sea.
I remember from a past interview Max saying that the rudder is crucial for getting speed. The more it's out of the water, the more you gain speed.
With the foil so forward there is more distance from them and the rudder.
Question: does this allow the rudder to stay more out of the water in a bow-down sailing mode ?
I think B2 will fly bow-down and overheeled, even more than B1.
With the foil so forward there is more distance from them and the rudder.
Question: does this allow the rudder to stay more out of the water in a bow-down sailing mode ?
I think B2 will fly bow-down and overheeled, even more than B1.
Last edited by a moderator:
Thanks again! ^
Attributed to JS
‘the most critical piece of the puzzle is accurately knowing the apparent wind angle of the other AC75.’
https://www.sail-world.com/news/232506/Americas-Cup-Rialto-Luna-Rossa-refines-design
Attributed to JS
‘the most critical piece of the puzzle is accurately knowing the apparent wind angle of the other AC75.’
https://www.sail-world.com/news/232506/Americas-Cup-Rialto-Luna-Rossa-refines-design
enigmatically2
Super Anarchist
It is quite obvious GB and AM have moved towards LR with their 2nd boats. But I think the hull of GB2 is actually closer to LR2 than it is to LR1. The underwater and above water shape are more similar than either is to AM2. The main visible difference is the above decks boom, though the keel cross-section is a bit different it appears to be a similar size. Whereas AM2 is perhaps closer to LR1
(I am ignoring foils as I see no reason any team would put their final race foils on at the launch).
So will be interesting to see where NZ ends up. But it seems we have a wait
(I am ignoring foils as I see no reason any team would put their final race foils on at the launch).
So will be interesting to see where NZ ends up. But it seems we have a wait
rh3000
Super Anarchist
Nauti Buoy
Member
- 220
- 84
Loop what they call their mainsail control by chance? Or just loading it up against itself in a loop...
Loops as in spectra soft attachment loops. They probably have specific ones they use for load/cell testing so that if they are compromised, they aren't used elsewhere.
My guess is that it’s for testing the FCS but maybe the fact the tester is sitting on the FCS breather-box is what leads to the thought.
Nauti Buoy
Member
- 220
- 84
I doubt they are load testing the foil arms in the water. That likely happened in the shed or before shipment to AKL. Otherwise, we would have seen them wheel it out as AM did.
