Behind the Brazuca: NBC’s extensive research hints less “knuckle-ball” in Brazil, NASA agrees

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After our extensive research it seems as though we can at least guarantee one thing at the 2014 World Cup in Brazil… a better soccer ball to play with.

Cast your minds back to the 2010 World Cup and the debacle that was the Jabulani ball which swerved and dipped all over the place to resemble a beach ball, rather than the ball of choice for the worlds most prestigious soccer tournament.

But fear not, the Brazuca — which was unveiled by FIFA last week before the 2014 World Cup draw — won’t be a distant relative to the Jabualni. It will be, well, more normal. I’m sure goalkeepers of all 32 nations who’ve qualified are now breathing a huge sigh of relief.

For all the details on the new ball, we share with you the incredible in-depth study from Ben Popken for the Consumer News at NBC Business. Ben takes up the story as a Japanese University and NASA break down the science behind the ball, which will be kicked around to either crush or ignite the dreams of billions of soccer fans across the globe next summer.

Over to you, Ben.

The Jabulani curse is lifted.

Any knuckleballs at the 2014 World Cup should be mostly intentional, according to new independent wind tunnel results by Japanese university researchers.

The researcher’s data shows the new Adidas-designed Brazuca matchball for the 2014 World Cup is less likely to swerve at goal strike speeds, meaning there shouldn’t be a repeat of the maddeningly erratic balls at the 2010 World Cup. During those games, goalkeepers and outfield players alike accused the Jabulani matchball, with its glossier texture, asymmetrical panels, and shorter panel bonds, for voodoo shots and an early tournament goal drought.

At the University of Tsukuba in Japan, sports engineering researchers mounted soccerballs in a wind tunnel, blasted them with air, and measured what happened.

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After undergoing extensive testing in labs, the “knuckle-ball” will be much less than we experienced with the Jubulani. (NBC News)

Now, in aerodynamics, for every surface there’s an airspeed at which the air flowing over it switches from smooth to turbulent, what’s called the “critical Reynolds number,” and can lead to the sudden veering in flight known as “knuckle-ball.” But in the tests the Jabulani’s occurred at higher speeds than the mid-30’s mph seen on older balls.

In fact, it happened at 53 mph, right in the 50-60 mph range professional goal strikes and corners start at.

That could explain a few things that happened in South Africa.

This time around, those strikes should power through the knuckle-ball effect. In the wind tunnel tests, the Brazuca’s critical Reynolds number occurred at 38 mph.

Those results are more comparable to the Tango 12 ball, itself a player favorite and one of the balls on which Adidas based the design for the Brazuca.

“The asymmetry of ball panel location is one of the reasons to produce knuckling effect,” said Dr. Takeshi Asai of the University of Tsukuba’s Institute of Health and Sports Science. “Ordinarily, the asymmetry of ball panel increases, as the ball panel number decreases.”

That means the Brazuca’s six interlocking boomerang panels, fewer than the Jabulani’s eight, both of which are fewer than the classic 32 pentagon and hexagon panels, could normally pose a problem.

“However, the total distance of the panel bonds or seams of the Brazuca is longer than that of Jabulani,” said Aasai, 10.89 feet worth compared to the Jabulani’s 6.49. “Therefore, I think the strength of the knuckling effect may be slightly lower than that of Jabulani.”

A NASA researcher agrees.

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Click to enlarge: Here’s the findings which shows how the Brazuca will perform (NBC News)

Rabi Mehta, Branch Chief at NASA Ames Research Center and an aerodynamics expert who previously evaluated the Jabulani, has examined close up photos of the new ball. He thinks the Brazuca will gain stability over the Jabulani from its longer seams, identical interlocking panels, and a surface that features a slightly raised texture similar to a basketball’s.

“My theory is that the effective roughness compared to the previous ball is increased, which means the speed at which it knuckles is lower,” said Mehta.

That’s good news for Adidas, which has spent years making sure the Brazuca isn’t Jabulani part 2. They kicked the ball over and over with a robot leg and measured its flight, interviewed hundreds of professional players, a third of which were non-Adidas sponsored, and even snuck the Brazuca in as the matchball for the U20 World Cup.

“While we can’t comment on independent research, we can say that Brazuca is our most tested ball ever,” said Adidas spokeswoman Lauren Lamkin. “We conducted two-and-a-half years of testing in 10 countries across three continents involving more than 600 players and 26 teams to ensure that Brazuca exceeds all performance standards.”

However, she said, “It is correct that the seam geometry aids in flight stabilization.”

Hopefully, all this science leads to surer shots and more exciting gameplay in Brazil come this June. If not, at least it will be harder to blame the ball for it.

The 2 Robbies: Alexis-Mkhitaryan Swap Becomes Reality

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Robbie Earle and Robbie Mustoe react to the Alexis Sanchez-Henrikh Mkhitaryan swap deal between Arsenal and Manchester United finally becoming reality (0:20), Swansea’s stunning 1-0 victory over Liverpool (9:20), Southampton’s much-needed draw with Spurs (22:30) and Watford’s decision to part ways with Marco Silva (36:20). The gents end the show sharing their memories of the late English striker, Cyrille Regis (39:45).

Join Earle & Mustoe on The 2 Robbies Football Show, Saturdays at 5pm ET. Listen on the NBCSports Radio App and call 855-323-4622 in the U.S. for lively passionate debate.

All of the The 2 Robbies content can be accessed by clicking on this link:

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Follow them on Twitter @The2Robbies

Inter Milan sign Barcelona midfielder Rafinha on loan

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MILAN (AP) Inter Milan completed the signing of Barcelona midfielder Rafinha on loan until the end of the season, with a view to a permanent move.

Inter can sign the Brazil international permanently for $43 million plus $3.7 million in bonuses, and said on Monday that option “must be taken up before the end of the season.”

Rafinha, who was born in Sao Paulo, had been at Barcelona since 2006, when he joined its youth team. He spent the 2013-14 season on loan at Celta Vigo.

After nine months out after surgery on his right knee, he made his first appearance of the season last week as a late substitute in Barcelona’s Copa del Rey defeat at Espanyol.

“It’s an important stage in my life,” he said, “and I had a lot of desire to approach this new phase in my career.”

Inter has slipped to fourth in Serie A, 11 points behind leader Napoli.

It could slip out of the Champions League places if Roma wins its match in hand on Wednesday.

“I hope to play in as many matches as possible and help the team to reach our objective which is Champions League qualification,” Rafinha said.

Klopp “angry, surprised” by Liverpool defeat to Swansea

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Liverpool fans might disagree — Jurgen Klopp certainly does, tonight, at least — but the beauty of the Premier League is that you can end the runaway leaders’ bid for an unbeaten season, then lose to the last-place team in the league, in back-to-back games.

[ MORE: Alexis-for-Mkhi swap complete | De Bruyne’s new contract ]

This, of course, leaves Klopp, Liverpool’s fiery, combustible manager, more than a little hot under the collar. Following Monday’s 1-0 loss away to bottom-of-the-league Swansea City, Klopp pulled no punches in describing the emotions he feels after such a result.

“Frustrated,” “angry” and “surprised” quickly came to mind after seeing his side’s 14-game PL unbeaten run come to an end. Despite creating 21 chances on the night, the likes of Mohamed Salah, Roberto Firmino, Sadio Mane and Alex Oxlade-Chamberlain managed to put just four on target, which was undoubtedly the genesis of his frustration, anger and surprise — quotes from the BBC:

“I’m frustrated and I’m angry because it was not a good game. We lost the game in the first half. We didn’t do what we wanted to do. It hasn’t happened too often so I didn’t expect that, I was quite surprised. Because of the first half we weren’t flying and they were.

“We made pressure at the end but not enough to score. The last situation was unlucky but if we got a point it would still have been a bad game for us, and it was the opposite of what we wanted. That happens from time to time and it’s never the right moment and like it should be.

“It’s not that we threw it away. Swansea are fighting for their life and we’ve no problem with that, we had a problem with our offensive motions. It’s not what we came here for tonight. We have nothing, and that’s our fault.”

Swansea 1-0 Liverpool: Last-place Swans shock Reds

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  • Swansea shock Liverpool in game of few chances
  • Mawson sweeps home the winner — 40′
  • Reds’ 14-game PL unbeaten run ends
  • Swans now 2W-1D-1L under Carvalhal

From the high of snapping Manchester City’s unbeaten run (30 games dating back to last season) and bid for an unbeaten 2017-18 Premier League season, to being beaten by last-place Swansea City… in back-to-back games… all in the span of eight days.

[ MORE: Watch full PL match replays ]

On Monday, Swansea topped Liverpool, 1-0 at the Liberty Stadium, to claim just their fifth PL victory all season; two of the five have come in the first three weeks of new manager Carlos Carvalhal’s tenure (four games).

Virgil Van Dijk cost Liverpool $100 million, but he’s yet to arrest the Reds’ woeful set-piece defending. It was the big Dutchman who failed to head the ball clear from the Swans’ 40th-minute corner kick. After an unfortunate bounce in the box, the ball fell to Mawson just 10 yards out. The young Welshman swept his right foot through the ball and Loris Karius could do nothing about it.

[ MORE: Latest Premier League standings ]

Liverpool’s first surefire chance of the second half came in the 60th minute, when Mohamed Salah delicately lifted just over the wall a free kick from 22 yards out. The ball quickly fell as it neared goal, but Lukasz Fabianski reacted quicker and pushed it over the crossbar at full-stretch to preserve the lead at 1-0.

Right on 94 minutes, with the referee staring at his watch, Roberto Firmino headed off Fabianski’s right-hand post and Adam Lallana missed an open-net follow-up, somehow booting the ball well over the bar from three yards out.

Despite holding over 70 percent of possession on the night, Liverpool put on target just four of their 21 total shots.

[ MORE: Full lineups, stats, box score ]

With the defeat, Liverpool (47 points) fail to capitalize on Tottenham Hotspur’s 1-1 draw with Southampton on Sunday. Having ultimately gained a point in Round 24, Tottenham now trail Liverpool by just two points in the race for fourth. The two sides meet in two weeks’ time, on Sunday, Feb. 4, at Anfield.

Swansea (20 points), meanwhile, have done nearly enough to climb out of the PL cellar, but remain 20th out of 20 teams on goal differential. Three points stand between them and safety.