Federer racquet shaking

[rpsbel]

Hi, look at this web page below at 1min 16 sec, and You will see the racquet shaking. It is pretty good image.

http://www.youtube.com/watch?v=Fg9ysITwz58

[Relinquis]

was pretty cool...

[PBODY99]

Super slow motion, ah digital hd tv.

[volleynets]

Not a good thread title description. It is actually warping and bending that's pretty amazing!!!

[DE19702]

Now assume you have a stiff light racquet and all that movement is twisting your wrist and elbow back and forth.

[Netspirit]

That is what Alzheimer's does to older people.

[mikeespinmusic]

Originally Posted by Netspirit

That is what Alzheimer's does to older people.

Parkinsons is the one that causes shaking. Alzheimer's is the forgetting one.

[mikeespinmusic]

Originally Posted by DE19702

Now assume you have a stiff light racquet and all that movement is twisting your wrist and elbow back and forth.

This video is proof of how great it is to have a flexible racquet.

[rpsbel]

Originally Posted by mikeespinmusic

This video is proof of how great it is to have a flexible racquet.

That is the point. We think that Federer uses a 68 RDC racquet. And the vídeo shows it twisting a lot.

[thejackal]

graphite-made things do flex, which is the beauty of it. materials like steel, aluminum and titanium flex a lot less, and in a less organic (like wood) manner, which is why you won't see those metals used to performance racquets in large quantities. older sticks like the t2000 and the arthur ashe have no modern equivalents because they just didn't play that well.

if you want to see flexing, watch what happens when hockey players take slapshots. the RA rating for hockey sticks go from 75 (extremely "whippy") to 120 (very stiff).

[Clintspin]

http://www.youtube.com/watch?v=xNPaZj4yn00

I think you can see that much better in this video.

[West Coast Ace]

Originally Posted by thejackal

graphite-made things do flex, which is the beauty of it. materials like steel, aluminum and titanium flex a lot less, and in a less organic (like wood) manner, which is why you won't see those metals used to performance racquets in large quantities. older sticks like the t2000 and the arthur ashe have no modern equivalents because they just didn't play that well.

if you want to see flexing, watch what happens when hockey players take slapshots. the RA rating for hockey sticks go from 75 (extremely "whippy") to 120 (very stiff).

Great post. And the AL and steel will eventually fail due to fatigue - carbon fiber, not so much.

The hockey stick tech is incredible; those big boys really bend those new sticks.

The tennis racquets take a lot more of the stresses - instead of sending it up your arm.

[mikeespinmusic]

Originally Posted by rpsbel

That is the point. We think that Federer uses a 68 RDC racquet. And the vídeo shows it twisting a lot.

I wish they'd show a video of someone using a stiff racquet. It would probably show their arm doing all the twisting and warping instead of the racquet... and then people will finally realise they should use a racquet with flex.

[rpsbel]

Originally Posted by mikeespinmusic

I wish they'd show a video of someone using a stiff racquet. It would probably show their arm doing all the twisting and warping instead of the racquet... and then people will finally realise they should use a racquet with flex.

But 68 RDC is not stiff enough?

[rafazx10]

Originally Posted by Clintspin

http://www.youtube.com/watch?v=xNPaZj4yn00

I think you can see that much better in this video.

So peaceful!

[mikeespinmusic]

Originally Posted by rpsbel

But 68 RDC is not stiff enough?

I don't believe Federer's racquet is 68. Not when his string tension is like 48 mains, 44 crosses. He'd launch everything out the court. I reckon its about high 50's - low 60's. But thats just me.

[rpsbel]

Originally Posted by mikeespinmusic

I don't believe Federer's racquet is 68. Not when his string tension is like 48 mains, 44 crosses. He'd launch everything out the court. I reckon its about high 50's - low 60's. But thats just me.

Some threads show that as 68 RDC. Below there is one post (I am not the author).


This is my friend's 2009 Federer K90 (racket number 56) mentioned on page 8 of this thread (photos etc below). Finally got around to measuring the specs:-

Weight: 367g (including everything and has 3g lead under the bumper at 12 o'clock)
Balance: 32.2cm
Swingweight: 350



And are these yours knots RJYU? LOL





Quote:


Originally Posted by RJYU View Post

Yup. Those are my knots. Or, as Nate calls them, "Those beehive looking pieces of sh*t."


The specs are very similar to those of a Federer K90 as measured by Art Art at Roland Garros which are below. He checked that racket, which had no lead under the bumper by the way.
RDC: 68
Weight: 367gr
Balance point: 31.8cm from the but cap
Wilson Gut 1.25mm/AluPower 1.25mm
Wilson overgrip.

If you can imagine some lead was moved from somewhere under the grip in Art Art's, to under the bumper in my friend's racket, that would explain the difference in the balance. I also think there must be a way to do this without changing the swingweight, but it depends where the lead was under the grip in Art Art's racket, and we will never know that unfortunately.

Also the above is the only time I've seen one of Federer's racket tested for RDC, interesting to see it is 68. It is really a pity Art Art wasn't able to get the swingweight checked for that racket, but at least both of these have been checked for lead under the bumper. Fabfed has been brilliant showing all his rackets, but understandably doesn't want to check under the bumper for lead. I looked under the bumper on my friends racket, and it was not easy to do without damaging the bumper!
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Last edited by jimbo333 : 04-15-2013 at 01:11 AM.