Slow Motion Videos
Olympus Tennis Analysis & Coaching
High Speed Camera Slow Motion Capture
- Brendan Slaven - Olympus - Use of Camera and technical support, design and analysis of data
- Peter McCraw - International Tennis Specialist
- Adam Kennedy - Player
- Mat O'Brien - High Performance Tennis Coach, MRT - Use of stringing machine and assistance on the day
- Quantum Leisure - Balls / Ball Machine
- Volkl Tennis
- Notting Hill Pinewood Tennis Club - Duncan Sillato (Head Coach) Use of Facilities for testing
- Other support - Ben Kasehagen - Deakin University Student. Daniel Laoang - Tennis Coach
Flex Infinity Strings - 1.25 @ 4000fps
Key Observations to Look For At 4000 FPS
1. It appears the ball has lower revolutions on exit.
Reality: The ball is revolving at 1650-1700 RPM.
2. There is a common belief in tennis that only the mains are displaced at impact. This video clip shows that ball impact is moving both mains and cross strings.
Observe: How fast the Flex Infinity CP+ strings “snap back” to perfect alignment within 4.00-4.25 mille seconds.
3. Observe: How far into the string bed the ball penetrates and its distortion then and when exiting the string bed.
Reality: Dwell time is how long the ball is in contact during impact. The Flex Infinity 1.25mm white dwell time is 4.00- 4.125 mille seconds. Normal average dwell time is 4.30-5.00 mille seconds. What does this mean? The normal forehand swing speed of 50mph or 73ft per second at around 4 mille seconds equates to racquet path moving approximately 3.5 inches. 5 mille seconds equates to racquet path moving approximately 4.5 inches. The longer the distance travelled the more chance of directional errors wide and long.
Is this the reason why players at all levels state that they have more control and accuracy when using Flex Infinity CP+ Strings?
4. Observe: How uniformly the Flex Infinity String matrix forms around the ball; creating a more accurate exit path.
Reality: Enhanced shot control and placement using Flex Infinity CP+ Strings.
5. The “slip factor” of the ball on the string matrix at contact of normal Co/Poly or Polyester average is 2-4inches.
Observe: Flex Infinity CP+ clearly shows less than 2 inches slip factor.
Reality: This is why you can approach the net and volley with good technique and achieve excellent results.
This video footage was produced by John Yandell of Tennisplayer.net and Peter McCraw, a high performance tennis coach. Testing was conducted on 26.07.2012 in San Diego at 2p.m. Temperature 23 degrees and no wind.
Racquet: Wilson 6.1 Grip No.3 16x19 pattern
String: Flex Infinity CP+ White 1.25mm pre-stretched.
Tension: Mains 56lbs. Crosses 54lbs
Machine: Ektelon W/B