A key function of the Technical Centre is tennis ball approval – any ball used in tournament play must be approved by the ITF, based on the tests conducted in this laboratory. Failures can occur in all tests , but the most common are the rebound and deformation tests. Least common are the size and mass tests.
Home TI magazine Balls Ball Testing. We follow the bouncing ball from the lab to the court. By Rod Cross and Crawford Lindsey. Various tennis ball types are designed differently, manufactured differently, and perform differently. We set out to measure these differences using different kinds of balls from . This means that the ball should reach between and of the drop height when bouncing.
However, that is a little difficult to . This video shows the automatic testing of tennis balls. When it comes to tennis balls , the brand matters of course, but a distinction needs to be made between the types of balls. Tennis ball bounce test part 1. Pressurized vs Pressureless balls. At the bottom of the food chain sit generic or practice balls that are usually the ones that failed to pass several tests.
The good news is that there is a chance to be . The specification was developed in consultation with the ITF to provide a fully-automate pneumatic pick-and-place machine. Description of the alternate hand wall throw and catch test of hand-eye coordination. Alternate Hand Wall Toss Test. A mark is placed a certain distance from the . To pass this test , a tennis ball , when dropped from a height of 1in (2cm) onto a concrete floor, must rebound not less than in (1cm) nor more than in (1cm) with all measurements taken from the bottom of the ball. Assess your hand eye coordination skill with this tennis ball test.
The machine performs a battery of tests without needing any human intervention. The ITF has taken delivery of a machine that allows it to test tennis balls automatically. Test summary and video of a tennis ball compression deformation test to measure forward and return deformation. To provide participants with an opportunity to understand the experiences of people from different racial and cultural backgrounds. Participants should stand next to their cylinders of tennis balls or other chosen visual device.
Examining the rules, this series of tests do monitor these characteristics, but how does this relate to specific ball performance? Is it possible to pass these tests and yet have an undesirable tennis ball trajectory? This is the concern and more “ dynamic tests ” ( tests which reflect how a tennis ball performs in practice) have been . These included taken samples of balls from long-term storage, from actual use in tennis and also subjecting balls to short-term high frequency bouncing.
A standard rebound test was used to evaluate the characteristics of the balls. It was concluded that the period of storage is probably the major factor in causing pressure . A tennis ball is a ball designed for the sport of tennis.