Category Archives: Testing Devices
Thank you for listening to the Racquet Quest Podcast!
I am posting here to make an addition and a correction to a previous podcast, and this is quicker than waiting for a week or so for a new episode.
The “Stringing and Racquet Data” podcast was cut short, so I will finish it here.
We were talking about the three (3) scale system we use to determine the torsional balance. The racquet is weighed at the midpoint of the head at the “top” and “down,” and the butt cap is resting on the third scale, and that is called the “butt.”
I don’t recall the podcast numbers right off, so I will use numbers from another racquet to explain. The racquet is a Wilson Ultra 100. The “top” weight is 95.3 grams, the “down” weight is 96.0 grams, and the “butt” is 119.9 grams for a total of 311.2 grams (10.97 oz.). So you can see the difference between the “top” and “down” number is only .7 grams, which is about a quarter of the weight of a vibration damper!
However, if this number was over 5 grams, we may want to “match” the numbers a little more closely! But, what if we wanted to increase the “top” weight by a lot to have the head heavier on one side than the other side? Why? Maybe a “training” aid to remind the player to keep the head lower, for example. Our experience shows that a difference between the “top” and “down” of 6 grams is noticeable.
On the Yonex VCore Pro 97 – Racquet Review, I noticed after the fact that I had indicated the Ereca System calculated the balance (CG) to within one-tenth of a centimeter! That would be pretty good, but in fact, the Ereca System calculates to within a tenth of a millimeter! Very precise! As of now, the Ereca System does not calculate swing weight as I tried to correct on the podcast but wanted to confirm that point.
Thank you for visiting the Racquet Quest website and listening to the Racquet Quest Podcast! Please let me know if you have any questions and suggestions for exciting topics!
Yes, I mean it!
Keep reading to see why I suggest you “play like a girl.”
About a year ago, a little girl, Meera, about 12 years old, came into the World Headquarters to demo a few racquets. She was committed to getting better and wanted a racquet that would help her.
After a few demos, she selected the Head Graphene Touch Radical Pro. During the discussion of how we were going to set up these new racquets, I mentioned the Head Pro Cap System that is compatible with this model.
If you are not familiar with the “cap” system, it is the plastic parts that fit over the head of the racquet to protect the string. All racquets have a grommet set, but the “cap” system encloses the string as it is installed therefore is more substantial than the standard grommet set. The racquet on the left has the “cap” system.
She purchased two (2) Head Graphene Touch Radical Pro, one with and one without the cap system.
So, other than doing a great job of protecting string it also provides additional inertia, or momentum, that blasts the racquet through the incoming tennis ball!
This momentum creates stability, and a stable racquet will be more powerful and controllable!
But wait, what about all that additional weight? That is the question we hear anytime we suggest adding weight to a racquet.
Weight is your friend! Every player is different so matching the racquet to the physical capabilities is critical!
It was so much of a friend to Meera that she quickly came in to have the second Head Graphene Touch Radical Pro fitted with the “cap” system and both racquets fitted with a Head Leather grip! The leather grip adds about 10 grams to the rear end of the racquet.
So, what are the specifications of this racquet that is being used successfully by a 12-year-old girl?
Take a look at these then tell me you can’t use a “heavier” racquet:
Weight: 360 grams (12.7 ounces)
SwingWeight: 344 Kg/cm² (12.1 ounces)
Points Head Light: 8.03…yes, still very much headlight!
Torsional Stability: 22…very good!
Recoil Weight: 176.9
Twist Weight: 246.9
*Ereca End Weight: 153.0
*Ereca Tip Weight: 207.0
*Ereca is a French company that designs and manufactures racquet diagnostic equipment.
Do yourself a favor and Play Lkie a Girl!
There is more to this story so keep checking back, and, if you have questions please click on “Ask John” above or respond to this post and I will try to answer them.
It is raining today and it felt like a good time to talk about “string bed stiffness”…so let’s go!
This quick video will make a plea to you tennis players to demand more from your racquet technician so you are getting the most from your equipment.
Thank you for watching!
I have often wondered what players know about the “stringing” process and in particular what goes on after the “string is strung”. So, while Madelyn was here she decided to video me doing what we do after each racquet is strung and just coming off the machine.
Had I known we were going to do this I might have dressed up a little, emptied the trash and fixed the crack in the wall behind the RDC! But I didn’t.
This video is offered as a “real-time” view of what we do with every racquet and is intended for information and fun only. If you have any questions please let us know…now enjoy the movie!
It has been incredibly busy this winter at Racquet Quest, but that is no excuse to keep you wondering what is here and what is coming your way soon!
You know the new Wilson Ultra series, both the CV and the Tour are in the shop along with the new Head Radical and Head Prestige. I have racquets for your evaluation now.
This website is consumer-centric, but I want to point out some new diagnostic equipment and stringing machines while we are here.
Gosen, one of the premier string manufacturers in the world, sent a GM One Diagnostic machine for evaluation. If you have been to the World Headquarters of Racquet Quest, LLC you have seen several pieces of equipment we use to certify that your racquet is in the very best playing and physical condition.
The Gosen GM One is a swing weight device that has extended the precision to .5 units! And, the included scale measures in the .1 gram range. This is extreme accuracy!
We have the Babolat Racquet Station stringing machine in for evaluation. A state of the art machine physically and electronically.
We are using this machine to evaluate different string formats, i.e., hybrids with polyester mains/multi-filament crosses, the reverse format, gut/polyester, polyester/gut and straight multi-filament.
The results are exciting and enlightening.