For the technicians - frame stiffness and strings

tenis

Professional
I really like one racquet, but the problem is - it's too stiff for me.
My question is: "Can I eliminate or lower the frame stiffness if I'll use softer strings or lower tension?"
 

Anton

Legend
I really like one racquet, but the problem is - it's too stiff for me.
My question is: "Can I eliminate or lower the frame stiffness if I'll use softer strings or lower tension?"
no, with time your racket will become a bit more flexy, but thats really the only way.

BUT you can make the racket feel less stiff by lowering dynamic stringed tension and/or adding weight to the loop.
 
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Bud

Bionic Poster
I really like one racquet, but the problem is - it's too stiff for me.
My question is: "Can I eliminate or lower the frame stiffness if I'll use softer strings or lower tension?"
You can't change the stiffness but you may be able to make it more comfortable by changing strings or lowering tension.
 

tenis

Professional
no, with time your racket will become a bit more flexy, but thats really the only way.

BUT you can make the racket feel less stiff by lowering dynamic stringed tension and/or adding weight to the loop.
lowering DYNAMIC stringbed tension= just lower tension?
to the loop = adding to 3+9, or 12?

thanks
 

Anton

Legend
lowering DYNAMIC stringbed tension= just lower tension?
to the loop = adding to 3+9, or 12?

thanks
yes, sort of.

For example at higher tension natural gut will have lower dynamic stiffness compared to other strings, because when the ball hits ngut it stretches further and absorbs more shock/torque.

But if you are using same string lowering tension will definitely lower dynamic tension as well.

As far as adding lead - it will basically become more solid no matter where you add the lead but effects are more pronounced where you put the lead - if you put it at 3 and 9 the racket will feel noticeably more comfortable when the ball hits closer to those points and maybe a bit more comfortable in other spots. Adding lead at 12 will noticeably soften up the feel in the top part of the loop. I recommend using small lead pieces and spread them out along larger area, this also lets you move them around to get it just right.
 
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corners

Legend
lowering DYNAMIC stringbed tension= just lower tension?
to the loop = adding to 3+9, or 12?

thanks
My understanding is that you can lower the 'dynamic stiffness' of a frame by polarizing the weight distribution and/or adding mass. Check out a recent addition to TW University - Vibration Frequency:

http://twu.tennis-warehouse.com/cgi-bin/vibfrequency.cgi

And TW Professor's explanation of the data:

http://twu.tennis-warehouse.com/learning_center/vibration_explanation.php

You'll see at the bottom of the explanation that dynamic stiffness, or vibration frequency, can be reduced by adding mass to the racquet. If you add near a vibration node (middle of stringbed & top of the handle) the frequency will be reduced little, but if you add to the tip of the racquet or in the butt the frequency will be reduced more.

The poster Travlerajm talked about this in an old thread where his use of the term 'dynamic stiffness' was ridiculed by various posters, some of whom are quite knowledgeable. Now we have the TW Professor, an eminent tennis physicist, using the same term.

So to reduce the dynamic stiffness you would add lead at 12, not 3&9, and counterbalance in the butt.

Adding weight at 12 will jack up your swingweight pretty quick, however, so you'll have to be comfortable doing that. One way to experiment with polarizing your racquet without making it heavier is to add 3 grams at 12, replacing the leather grip with a synthetic (-8 grams or so) and putting that 8 grams back, but in the butt. Doing this would pretty much maintain your balance but result in a significantly more polarized setup with reduced dynamic stiffness. If you don't like it, or can't notice any difference in comfort, its easy to reverse the process. This assumes you are using a leather grip now; if you're not you would just put 3 grams at 12 and 3 in the butt, but the result won't be quite as noticeable.
 

JackB1

G.O.A.T.
If the frame is too stiff, best thing would be to sell it and get another one. There is only so much you can do with strings and tension. Stringing it on the low end of the range with a soft multi or nat gut will make it feel softer, but the frame will still be the same frame.
 
I really like one racquet, but the problem is - it's too stiff for me.
My question is: "Can I eliminate or lower the frame stiffness if I'll use softer strings or lower tension?"
It will help the problem along with stringing lower tension, but the frame it's self will remain stiff.
 

tenis

Professional
Thanks guys, especially "Anton" & "Corners".
My last try with this racquet will be adding lead to the tip and butt, make it more polarized. I have to keep the same balance, actually more weight will be better, since I always played heavy racquets (Prestige Classic, SRD 90,Pro Stuff etc.).
 
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