Kennex

#1
I have the following Kennex racquets that have gone dead.KQ15,KQ15 Advanced Kinetic System,Kinetic Pro 7G. When I shake the racquets I cannot hear the Kinetic material. I thought it was supposed to go to the handle. Has anybody had this experience?
 

A_Instead

Hall of Fame
#2
You used up all of their stored kinetic energy..unfortunately just like the I phone..they can not be replaced..time for a new racket..
 
#6
The beads are enclosed in several vinyl pockets and place into the hoop and handle at manufacture. They cannot float freely from hoop to handle because that would violate a rule that forbids objects from moving toward the head to make a heavier shot. With PK, the beads move less than a few mm, so not increase in power is created. They are there solely for the vibration dampening
 
#8
The particles will still move in their eggs even when you don't hear them when you shake the racquet. The impact when hitting a ball is much greater than your shaking efforts. As long as the particles 'destroy' the vibrations, you would be OK. I use to worry about this in my 7Gs, but I don't even think about it anymore until this thread popped up.
 

aussie

Professional
#10
The beads are enclosed in several vinyl pockets and place into the hoop and handle at manufacture. They cannot float freely from hoop to handle because that would violate a rule that forbids objects from moving toward the head to make a heavier shot. With PK, the beads move less than a few mm, so not increase in power is created. They are there solely for the vibration dampening
Actually Steve I don't think you are correct in stating the beads "are there solely for the vibration dampening". My recollection is that the original reason for the kinetic bearings was to enable greater mass in the head when the bearings moved forward upon the ball making contact with the strings. When PK had the technology tested independently, it was found that a secondary, but important effect of the micro particles moving forward on impact was the absorption of vibration.

That's my recollection of why PK went down the kinetic path but if I'm wrong I'm sure I'll be corrected!!
 
#12
Aussie--the rackets would be illegal if that were true. You cannot have a sliding mass that moves with the swing. Write USRSA if you want confirmation, or even Pro Kennex.
 
#13
"the original Kinetic Technology. It feature thousands of micro-bearings housed inside multiple chambers surrounding the entire racquet head. As the racquet swings forward, the micro-bearings move to the back wall of the frame, loading energy. When the racquet strikes the ball, this kinetic mass transfers forward, adding power and reducing frame shock and vibration. "
 
#14
I have the following Kennex racquets that have gone dead.KQ15,KQ15 Advanced Kinetic System,Kinetic Pro 7G. When I shake the racquets I cannot hear the Kinetic material. I thought it was supposed to go to the handle. Has anybody had this experience?
Should have got Pro Kennex, instead of just Kennex?
 
#15
"the original Kinetic Technology. It feature thousands of micro-bearings housed inside multiple chambers surrounding the entire racquet head. As the racquet swings forward, the micro-bearings move to the back wall of the frame, loading energy. When the racquet strikes the ball, this kinetic mass transfers forward, adding power and reducing frame shock and vibration. "
So is forward/back movement of the beads i.e. movement in direction of one's swing as distinct from movement towards the racquet tip okay, or es ist verboten also?
 
#16
This is starting to sound a bit like North Korea claiming that their uranium enrichment is done solely for peaceful purposes; or Japan with the whole whaling for scientific research thing...
 
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Ronaldo

Talk Tennis Guru
#18
Shirley Pro Kennex has shown diagrams proving this technology in an approved form.
Not in some shape-shifting form. Certainly you can feel it,
 

aussie

Professional
#19
So is forward/back movement of the beads i.e. movement in direction of one's swing as distinct from movement towards the racquet tip okay, or es ist verboten also?
Yes, from what I recall when researching before purchasing a 5G a number of years ago, the technology was submitted to tennis' governing body (ITF?) and was approved. If the micro bearings had travelled towards the tip or tail, the tech would have been deemed illegal.

As I wrote previously, the fact that testing showed that the loading and then releasing of the bearings reduced shock/vibration was an unintended and surprising benefit of the technology. A search through Google will uncover all the review papers.
 
#20
Yes, from what I recall when researching before purchasing a 5G a number of years ago, the technology was submitted to tennis' governing body (ITF?) and was approved. If the micro bearings had travelled towards the tip or tail, the tech would have been deemed illegal.

As I wrote previously, the fact that testing showed that the loading and then releasing of the bearings reduced shock/vibration was an unintended and surprising benefit of the technology. A search through Google will uncover all the review papers.
I wouldn't worry about answering some of the flat out laughable replies in this post. Words like "violates the rule" and "illegal" should be red flags.
 
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