Video of the Making of 2010 World Cup Football:
While Adidas would not provide numerical flight data, it claims that robotic kicking and wind tunnel testing at Loughborough University in England and at its own football lab in Germany show that Jabulani is its most accurate ball. To be sanctioned FIFA Approved, a ball is only subject to a handful of more static tests, which the Jabulani ball obviously meets.
• Circumference: FIFA Standard: 68.5-69.5cm, Jabulani: 69.0 +/- 0.2
• Roundness: Diameter is measured in 16 different locations. FIFA Standard: max 1.5% difference, Jabulani: max 1.0% difference
• Water Absorption: A ball is pressed and rotated in water 250 times: FIFA Standard: max 10% weight increase. Jabulani: 0% weight increase
• Weight: FIFA standard: 420-445 grams, Jabulani: 440 +/- 0.2 grams
• Uniform Rebound: The only dynamic FIFA test, the ball is dropped ten times onto a steel plate from a two meter height. The difference from the lowest to the highest bounce can be no more than 10 cm. Jabulani bounced in a range from 143 to 149 cm