ETNZ, intentado develar los secretos de su velocidad.

Los secretos de ETNZ

Semana dificil para Oracle Team USA, obligado a encontrar respuestas a su falta de velocidad respecto a ETNZ. Buscando información en las redes y a través de charlas con amigos, se puede hacer un resumen con las características más destacables en la forma de navegar de ETNZ, casi todas bastante imperceptibles por TV.
En general son temas muy técnicos, que la mayoría de los que navegamos apenas entendemos. Dice una fuente amiga (textual):
“ETNZ navega con menos YAW (rotación, ver en wikipedia para entender mejor el concepto). Una vez que están volando en los foils, los cascos los orientás como queres en el aire. La generalidad es volar con el barco ROTADO hacia barlovento para que los cascos sean más aerodinámicos. ETNZ los lleva más para sotavento, con lo que le ganan unos grados de ataque a las velas. Por eso navegan con menos traveller y el foque más abierto que el resto”.
Y sigue: “El WAKE (estela del barco o apéndice en este caso) de los foils, a todos los equipos les pasa por dentro del timón por efecto del LEEWAY (abatimiento) que tienen los barcos. Los kiwis orientan los cascos en la dirección del leeway y el wake de los foils les pasa por fuera del timón.”
Hay que recordar que todo lo anterior de “acomodar” el casco respecto al foil, es posible porque las cajas contenedoras de los foils o daggerboars (orzas) tienen movimiento en todos los sentidos.
Respecto a los foils de ETNZ que tanto se habla, los kiwis “habrían” desarrollado un sistema de encastre para cambiar las puntas de los mismos con relativa facilidad y confiabilidad, algo muy delicado porque a altas velocidades existe el riesgo de la cavitación. También se sabe que tanto Oracle como ETNZ usan daggerboards “sutilmente” asimétricos. Los motivos y justificación vienen dados por el propio formato del recorrido, que exige ser muy rápido en la largada y primer tramo de reach (el barco que pasa adelante la primer boya, suele gana la regata. Es un dato histórico de las finales de la Copa America, que hasta ahora se viene cumpliendo). Además de todo esto, los kiwis tienen unas orzas AP (all purpose) muy versátiles y eficientes que cubren un rango de 9 a 13 nudos, la intensidad promedio de viento en Bermuda en esta época.
De las alas o wings: “las alas originalmente (de diseño) tenían un receso, que nadie sabia a ciencia cierta porqué existía. Oracle pidió (y el Jury le permitió) rellenarlo y de esta manera reforzarlase, para luego poder llevan los obenques bajos más sueltos. Con eso logran que en vez de tener dos toneladas  de tensión en la burda y una tonelada en los obenques bajos, pueden llevar tres y cero respectivamente. Con eso, el casco de barlovento va con la proa más baja, y efectivamente ganan otro grado de timón, para darle más estabilidad. ETNZ ahora tambien lo hace.”
Pero el punto más destacable de los kiwis es sin dudas la capacidad que tiene Glenn Ashby (ver video exclusivo con Juanpanews.com en Bermuda) de trimar el wing en forma más rápida y eficiente que Oracle. A diferencia de los Yanquis (y del resto de los equipos que participaron en la LVC), los kiwis pueden twistear el ala filando menos traveller. Esto lo logran gracias a mejores sistemas y un concepto de diseño diferente, muy difícil de copiar a esta altura. No esta probado fehacientemente pero se presume que la velocidad de cazado del twist en el barco kiwi, sería 5/6 veces más rápida que la de su oponente. Esta habilidad “técnica y de sistemas” es vital para poder navegar al estilo Moth, con el barco escorado hacia barlovento y con el pontón de barlovento casi tocando el agua (se le llama “catch” a esta técnica). Una forma de navegar probadamente más eficiente porque el centro de esfuerzo del ala/wing se direcciona más hacia arriba que hacia abajo.
Yendo a la configuración de la tripulación y sus funciones a bordo también vemos grandes diferencias entre los dos equipos. A la ya sabida eficiencia de fuerza y aerodinámica de los “cyclors” (grinders a pedal), se le suma la ventaja de tener las manos libres para hacer más tareas. En el caso especifico de Blair Tuke (4to. ciclista desde proa), puede generar energía pedaleando pero además controlar la estabilidad de foileo del barco, tarea que en Oracle (y el resto de los AC50) lo hace el timonel con una especie de “acelerador” en la rueda de timón. Esto libera al timonel de una responsabilidad y stress enorme, y le permite estar más atento a la táctica y en mirar más al otro barco.
Gracias por leer la web cada día, espero poder seguir contando cosas y datos interesantes en los próximos días.

Juanpa Cadario

Red Bull Youth America’s Cup Finals. Land Rover BAR Academy al frente.

Fuente info AC35

06/20/2017
FAIRYTALE START FOR TEAMBDA BUT LAND ROVER BAR ACADEMY DOMINATE DAY ONE OF 2017 RED BULL YOUTH AMERICA’S CUP FINALS

Day one of the 2017 Red Bull Youth America’s Cup Finals belonged to Land Rover BAR Academy who sit on top of the leaderboard heading into day two after two second places and a first place in the three races on day one.

Land Rover BAR Academy Skipper Rob Bunce summed up the team’s performance, saying, “It is the perfect start we were looking for and we’re all delighted with our level of consistency. In all honesty, our main focus isn’t to necessarily to win each of the races, it is more about keeping that consistency and finishing in the top three as much as we can because consistency is key.

“Getting off that start line cleanly has been the crucial thing for us and if we can do that then we’re all confident we are quick enough to challenge for those top places on a regular basis.

“It is amazing to know there are only three races remaining but we will go into tomorrow as if today didn’t happen. We will take all the positives from today but there are still things to learn and improve on.

“All of the team from Land Rover BAR, including Ben (Ainslie) have been incredibly helpful and supportive to us on and off the water. It’s been amazing to have that support and hopefully we can do this for them as well.”

For the home of the 35th America’s Cup, the day started in fairytale fashion for local heroes TeamBDA whose incredible story in the 2017 Red Bull Youth America’s Cup continued in fine style when they won the first race of the Finals against their seven competitors.

Sigue leyendo

35 America´s Cup Match. ETNZ no da chances a un sorprendido Oracle Team USA, y se pone 3 a 0.





Fuente info AC35

06/18/2017
BURLING AND EMIRATES TEAM NEW ZEALAND MARCH ON BUT SPITHILL VOWS TO FIGHT BACK

Battle resumed on Father’s Day in the America’s Cup Match, presented by Louis Vuitton, with Jimmy Spithill’s ORACLE TEAM USA looking to seize back the advantage gained by Peter Burling’s Emirates Team New Zealand on day one. However, it was day two to the Kiwis again, with Emirates Team New Zealand recording two more back-to-back victories over the Defenders of the America’s Cup, putting themselves 3-0 up in the first-to-seven series that will determine the winner of the 35th America’s Cup.

After racing had finished on day two, Jimmy Spithill looked ahead to the five day break before racing restarts on 24th June and what ORACLE TEAM USA can do to put themselves back in the fight. “These are going to be the most important five days of this America’s Cup campaign for us,” said the two-time winner of the America’s Cup.

“I thought we took a good step forward from yesterday, but it is clear we have to find some speed from somewhere, that is no secret.

“If we were forced to race day after day we’d be in some serious trouble at the moment. This break coming up is a massive opportunity for us as a team to go away and regroup.

“Everything will be put out on the table, nothing will be off limits, and over the next five days our incredible shore team will be looking at every aspect of our boat.

“Nothing will escape our eyes, I can guarantee that. Whether it’s system related, appendage related, sailing technique or strategy, we are going to look at absolutely everything.

“The motivation is always there, the team is hungry and we’re a very competitive group, but we are also a candid group and it is quite clear we need to make some changes.

“We feel that with the resources we have here we can make the changes to improve the boat and give us more speed. It looks like we have some good sailing days coming up over these next five days so we’ll be into 24 hour shifts.

“We’ve been in a situation like this before and we’ve had less time. We’ve got five important days and we’ll be using every single hour of them.

“We have to respond.”

In reply, despite knowing that repeating the opening weekend’s performance when racing resumes on 24th June would confirm Emirates Team New Zealand as the 35th America’s Cup champions, Burling again warned his team against complacency.

“We are walking away with two victories again but, much the same as yesterday, we made too many mistakes,” said the Kiwi helmsman.

“We now have five days to keep pushing on and progressing because everyone in this team is hungry to keep on improving and learning.

“We know full well if we stand still, Jimmy (Spithill) and ORACLE TEAM USA will catch us so we have plenty of work on in the next five days.

“We’re happy to take those four wins because it is no secret that we are here to win the America’s Cup. We knew to do that we had to win eight races and so we have to keep on battling to ensure that is what we do.”

America’s Cup Match, presented by Louis Vuitton, Race Three

Race three saw Peter Burling and Emirates Team New Zealand pick up where they left off on day one, sealing a third consecutive victory over Jimmy Spithill’s ORACLE TEAM USA to extend their advantage in the America’s Cup Match, presented by Louis Vuitton to two points at the halfway stage of day two.

At the start of the race, both teams were extremely close as they crossed the startline, and ORACLE TEAM USA had a small advantage as they approached the first mark. However, in similar scenes to day one’s two races, a small mistake was to prove pivotal as a poor jibe by ORACLE TEAM USA saw the American boat make a small splashdown into the water, resulting in a loss of momentum that they were then unable to claw back.

That mistake handed the initiative to Burling and he seized the opportunity, sailing clear of his rival to hold an 11 second lead at gate two.

Trailing the Kiwi boat, Spithill went for the split at the gate as he chased hard in pursuit of Burling, winner of the Red Bull Youth America’s Cup in 2013. However, Emirates Team New Zealand continued to showcase their impressive speed and steadily increased their advantage through the next two gates, holding a 49 second lead by leg 5/7.

Spithill’s ORACLE TEAM USA continued their pursuit, in the hope of a mistake from their Kiwi rivals in the closing stages. However, it was not to materialise. Burling kept his composure, rounding the fifth gate with his 49 second advantage intact, and from that point there was no looking back Emirates Team New Zealand crossed the finish line nearly a minute ahead of the US team and Burling claimed his third victory on the trot in the America’s Cup Match, presented by Louis Vuitton.

America’s Cup Match, presented by Louis Vuitton, Race Four

Race two started in almost identical fashion to the first race, with both teams racing extremely closely to one another as they crossed the start line, quickly accelerating to around 40 knots as they headed towards the first mark.

Both teams essentially had faultless races, but the superior boat speed of Emirates Team New Zealand proved the deciding factor, the Kiwis pulling away throughout the race to build a lead of 500 metres heading towards the fifth gate.

Emirates Team New Zealand rounded Gate 5 with their advantage standing at a minute, with Jimmy Spithill only able to watch on in the hope of a mistake from his rival Peter Burling, but it was not to be.

At the end of race four it was Emirates Team New Zealand who were celebrating again, finishing the day with two more points on the leaderboard and clear air between them and ORACLE TEAM USA.

America’s Cup Match, presented by Louis Vuitton, Race Results

Race Three: Emirates Team New Zealand beat ORACLE TEAM USA by 49 seconds

Race Four: Emirates Team New Zealand beat ORACLE TEAM USA by 1 minute and 12 seconds

America’s Cup Match, presented by Louis Vuitton, Scores (18th June 2017)

Emirates Team New Zealand: 3 points*

ORACLE TEAM USA: 0 points

* Emirates Team New Zealand started the America’s Cup Match, presented by Louis Vuitton -1 due to ORACLE TEAM USA’s win in the Louis Vuitton America’s Cup Qualifiers

35 America´s Cup Match. Un contundente ETNZ se pone 1 a 0 sobre Oracle Team USA.





Fuente info AC35

06/17/2017
ADVANTAGE BURLING AND EMIRATES TEAM NEW ZEALAND

It is advantage Peter Burling and Emirates Team New Zealand at the end of day one of the America’s Cup Match, presented by Louis Vuitton. The Kiwi Challengers to Jimmy Spithill’s ORACLE TEAM USA took back-to-back victories in the first two races of the final stage of the 35th America’s Cup, putting them into a 1-0 lead over the Defenders of the ‘Auld Mug’ at the end of day one of the America’s Cup Match, presented by Louis Vuitton, in Bermuda.

The New Zealanders’ first race victory of the day put the scores at 0-0 as Jimmy Spithill’s team started the America’s Cup Match, presented by Louis Vuitton with a one point advantage over their rivals, having won the Louis Vuitton America’s Cup Qualifiers. Their second victory of the day put the Kiwis into an end-of-day-one lead of one point, with ORACLE TEAM USA yet to score.

The match-up between ORACLE TEAM USA and Emirates Team New Zealand is a rematch of the 2013 America’s Cup Match in which ORACLE TEAM USA staged what many call the greatest comeback in sport. Then, the US team turned an 8-1 deficit to their Kiwi rivals into a 9-8 victory in San Francisco, setting the stage perfectly for the mother of all grudge matches which is now taking place on Bermuda’s Great Sound.

“Everyone connected to our team has been working incredibly hard to try and give us a fast boat and it is incredible to be able to reward them with two victories today,” said Peter Burling.

However, despite Emirates Team New Zealand securing back-to-back victories on day one, Burling is not getting carried away just yet. “Jimmy (Spithill) and ORACLE TEAM USA sailed really well to put us under a lot of pressure, but we managed to keep our composure and sail really well.

“We’ve said all along that we are learning all the time and although we won both races we got a lot wrong and made too many mistakes today.

“We will go away and look at what we need to improve because we all know for a fact that Jimmy (Spithill) won’t give up and so we have to keep progressing.

“We’ve known all along that to win the America’s Cup we had to win eight races and so to get two wins on the board already is fantastic. We’ll keep battling away and aim to get the remaining six wins needed as soon as possible.”

Despite relinquishing the point advantage they held at the beginning of the day, ORACLE TEAM USA helmsman Jimmy Spithill is refusing to panic, especially with the experience of overturning an 8-1 deficit to the same opposition in 2013. “We’re obviously disappointed with what was a tough day, but the deficit is only one point so we we’re not panicking,” said a defiant Spithill.

“Clearly we didn’t sail our best today, but we still had opportunities and that is what we will take away with us.

“It is too early to draw conclusions on what went wrong for us but we will go away and look at what we have to change ahead of tomorrow.

“Credit to Peter (Burling) and Emirates Team New Zealand because they made fewer mistakes to win both races.

“However, I’ve been here before, and it is still only a point!”

America’s Cup Match, presented by Louis Vuitton, Race One

Jimmy Spithill’s ORACLE TEAM USA made the worst possible start to their defence of the ‘Auld Mug’ as they were handed a penalty for crossing the start line fractionally early.

“We had a little issue on board during the first start,” said Spithill. “We thought we were coming back when we wanted to but as it turned out we were wrong, it is something we will have to go back and look at. We basically handed that first race to them.”

The penalty handed the initiative to Emirates Team New Zealand, and Peter Burling took full advantage, sailing well clear of his rival Spithill, holding a 32 second lead by the turn at the second gate.

In relatively light winds, Burling continued to sail smoothly, extending the Kiwis’ advantage to a healthy margin of one minute and 52 seconds over their rivals by the fifth gate.

However, Burling did not have it all his own way and mistakes began to creep in. Two poor manoeuvres reduced Emirates Team New Zealand’s advantage, giving Jimmy Spithill a slight hope of catching the Kiwis in the closing stages.

“It was an incredibly tricky day out there with the winds and they certainly weren’t our best manoeuvres,” conceded Burling. “If you make a small mistake it can prove a costly one.”

However, there was to be no late drama, as Burling’s team crossed the finish line 30 seconds ahead of Spithill’s ORACLE TEAM USA, wiping out the minus one point deficit to the Defenders and levelling the overall scores to 0-0 ahead of race two.

America’s Cup Match, presented by Louis Vuitton, Race Two

Having cut the point deficit, Peter Burling and Emirates Team New Zealand set about building on the momentum of victory in the first race by again beating Jimmy Spithill’s ORACLE TEAM USA away from the start line.

Race two was much closer than race one, but Emirates Team New Zealand were still able to pull clear, establishing a lead of up to one minute, 34 seconds by the time they rounded mark four.

However, once again Emirates Team New Zealand gave their rivals a glimmer of hope in the closing stages as ORACLE TEAM USA dramatically cut the gap to Emirates Team New Zealand on the run to the fifth mark. As both boats headed towards the turn the gap was down to just over three seconds, and it looked like the US team might record their first win of the America’s Cup Match, presented by Louis Vuitton, but it was not to be.

“Halfway way up that second beat we definitely lost a lot and we have to go away and keep learning and improving,” admitted Burling.

Having closed the gap, ORACLE TEAM USA’s yacht came down off its foils and that gave Emirates Team New Zealand the chance to re-establish their lead.

“I think what happened is that we lost a rudder,” revealed Spithill, reflecting on the manoeuvre that all but ended their challenge.

“We’ll have to go back and look at that because it was obviously a key moment in the race.”

With the pressure now off, Burling guided his team around the sixth and final gate and coasted to the finish line an entire minute and 28 seconds ahead of Jimmy Spithill’s ORACLE TEAM USA, taking not only their second successive win of day one, but also moving into a one point advantage in the battle for the ‘Auld Mug’.

America’s Cup Match, presented by Louis Vuitton, Race Results

Race One: Emirates Team New Zealand beat ORACLE TEAM USA by 30 seconds.

Race Two: Emirates Team New Zealand beat ORACLE TEAM USA by 1 minute and 28 seconds.

America’s Cup Match, presented by Louis Vuitton, Scores (17th June 2017)

Emirates Team New Zealand: 1 point*

ORACLE TEAM USA: 0 points

* Emirates Team New Zealand started the America’s Cup Match, presented by Louis Vuitton -1 due to ORACLE TEAM USA’s win in the Louis Vuitton America’s Cup Qualifiers

35 America´s Cup Match. Oracle Team USA y ETNZ, listos para la gran batalla. Reporte de ambos equipos.



Racing Schedule
M1: ORACLE TEAM USA v. Emirates Team New Zealand
M2: Emirates Team New Zealand v. ORACLE TEAM USA
Weather
2:12 pm 2:57 pm
The forecast has improved, predicting an eight – 12 knot easterly breeze for both Saturday and Sunday.

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Reporte de Oracle Team USA

Spithill: “We’re ready for the Battle of Bermuda”
Bermuda, Friday, June 16, 2017

After nearly four years, Jimmy Spithill will once again lead ORACLE TEAM USA into battle against Emirates Team New Zealand.

The last meeting between these teams in the America’s Cup Match saw Spithill and his team complete one of the most remarkable comebacks in sporting history to win the 34th America’s Cup in September 2013.
Now, the teams will renew hostilities with the oldest trophy in international sport on the line once again. This time on Bermuda’s Great Sound.
“I think we’re going to see one of the best sporting events of the year here over the next two weekends,” said Spithill.
“These are the best boats, the two best crews and we’re both highly motivated to win. It’s going to be sport at its best.”

Spithill and his team beat Peter Burling’s Kiwis twice in the Louis Vuitton America’s Cup Qualifiers a couple of weeks ago. In the second contest, the winner would earn a one point advantage heading into the America’s Cup Match. Spithill and ORACLE TEAM USA won the race and the advantage.
With the Qualifiers victory, the defending champion starts the Match on 0 points, while Team New Zealand is on -1.
The first team to earn 7 points wins the America’s Cup.
“I definitely think this bonus point advantage is going to be important,” Spithill said. “Look at what happened last time when it all came down to one point.
“We worked had to get this, all the way through the Louis Vuitton America’s Cup World Series in 2015 and 2016 and then in the Qualifiers a couple of weeks ago. I know we’re much happier starting where we are, without being down on the scoreboard.”
The forecast is for light to moderate Easterlies this weekend, with winds in the 8 to 11 knot range.
“The easterly is a tricky direction,” Spithill said. “It’s shifty and puffy and I’m sure you’ll see some lead changes in the racing because of it.”
ORACLE TEAM USA is looking to win its third consecutive America’s Cup, a feat last achieved by the same team in the 1930s.
Two races are scheduled on both days this weekend, beginning at 14:12 local time (1:12pm ET). The racing is live on NBC television in the United States. For other territories, check here – https://www.americascup.com/en/where-to-watch.html

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Fuente info ETNZ

THE CALM BEFORE THE STORM

With the final pre-race press conference concluded the talking has stopped, the phoney war is over and the real battle is about to begin on the water.

For Emirates Team New Zealand it’s the culmination of a long and difficult journey along which they’ve had to overcome all manner of obstacles.

As Peter Burling told the world’s media: “It’s taken a massive effort to get this far. We’ve faced a lot of adversity over the last couple of weeks with things like the capsize, but our shore crew really dug deep to get us a boat that is fully back to 100 per cent and we are just really excited to get into it.”

The 26 year old helmsman, paid tribute to the support the team has been getting from New Zealand: “Having the Kiwi fans back home supporting us and getting behind us is something we really appreciate and it really inspires us to keep fighting hard and keep pushing forward, and I am sure it is going to be one hell of a battle out there on the water.”

And thanks to the level of competition through the Louis Vuitton Challenger Series, the team is feeling battle-hardened: “We feel we are a much harder team after the racing we’ve had and it’s full credit to the challengers for the way they pushed us in the series. And we definitely feel that we are a lot tougher than we were a few weeks ago.”

Burling also touched on the disappointment of four years ago in San Francisco and alluded to the fact that only one sailor from the 34th America’s Cup is still on the boat…skipper Glenn Ashby…and the other five first-choice crew are all under 30 years of age: “We all remember San Francisco and how close we did get,” he said. “And we definitely learned a lot of lessons and we are a lot stronger and different team now than we were back then.”

Asked about going into the match already a point down to Oracle, Burling again looked to history to make his case, referring to the American team going into the last Cup with a deficit: “It didn’t seem to matter too much who went into the last Cup a couple of points down, so I don’t imagine it will matter much this time.

“For ourselves the America’s Cup is one of the unique sporting trophies where it’s all about who wins the last race not the first and that’s what we’ve been set up to do.”

Earlier the crew took Aotearoa out onto the Great Sound for some final tests before the sailors left early to go home and rest up.

It’s quiet on the Emirates Team New Zealand base, the calm before the storm in Bermuda.