but wait.....federer's wrist was so stable.....

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hp12c

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Pure and Simple.

You CAN NOT make the face do ANYTHING during impact—even on purpose.

It is really a shame that folks waste time with this stuff.


Goofy.

Ah man I saw u posted and I was exepcting a video answer or some long scientific and not scientific response and all I get is this:(
 
As I recall, that Adidas/TM soccer ball design didn't go over too well in the World Cup. Unless it was square, I have no idea what was complained about.

A square?!?! A bloody square????? We in the non-U.S world have all of the luxuries and accoutrements of you Americans...including three dimensions!;)

(But I did enjoy your very trenchant cricket commentary:))
 
It's already been happening. Flightscope Tennis does all the radar tracking for Wimbledon and the WTA, and Flightscope Cricket does the ball tracking (Speedstick and Speedball) for that riveting sport. Only problem with the cricket radars is that a battery (or other power supply) does not exist that can last as long as a match.

170px-WGGrace.jpg


That white structure in the background is the first cricket radar.

But they are working on a nuclear power source that just may last long enough for a test match.

Drew
 
Two things normally happen for a top spin shot.
The racket is going up and the racket is slightly tilted downward.

This is spot on for a Western-grip player but back in the day there was a Continental-grip player named Rod Laver that could turn it over from the bottom of the ball. Harry Hopman acknowledged it distinguished Rodney from his peers. If you ever saw his left forearm it would be obvious why.
 
A square?!?! A bloody square????? We in the non-U.S world have all of the luxuries and accoutrements of you Americans...including three dimensions!;)

(But I did enjoy your very trenchant cricket commentary:))

Now to be fair, they all haven't figured out the three diminutional thing... especially as it applies to water...:D

255718_stock-photo-three-melting-ice-cubes.jpg
 
Now to be fair, they all haven't figured out the three diminutional thing... especially as it applies to water...:D

255718_stock-photo-three-melting-ice-cubes.jpg

Side-splitting stuff, Mike. Between Europe and America we have the three states of matter figured out: Solid, liquid and you guys do a great line in hot air...;)
 
you can position your elbow in any place you want, you can hold your wrist in any attitude, you can close the the face or try to keep it "hinging vertically" all you want......but THERE IS NO WAY IN HELL that you can overcome the forces that are involved at impact with even slightly mishit shots......

as someone pointed out, there probably has never been in the history of golf an impact with the COGs of both ball and club head perfectly aligned......the federer video shows a stretched out volley that is mishit....federer's wrist is braced for the impact, but the off centeredness of the contact literally destroys the racket face and makes it do magic tricks....

the sheer insinuation that a pro golfer with a "force across the shaft" impact has more of a chance to resist the twisting that is involved with an off center hit is folly......d bag folly

really enjoying the sites some guys have put together - they have 3 posts a week at each and the ad revenue just has to be pouring in...and as i have said numerous times, the success (or failure) of those sites could not be more appropriate or deserving
 
The video looked to me like an intentional top spin shot (but I don't play tennis). Now people are saying no it was a mis-hit and because it was mis-hit on the bottom of the racket (in effect de-lofting the racket), that was the cause of the top spin. OK fine. Like I mentioned I have no idea what this rate of closure has to do with the price of fish anyway.

As far as intentionally hitting it off center for a deadened shot. I would think it would be similar to intentionally hitting a putt out on the toe to deaden the putt or trying to intentionally blade a wedge around the green, or chipping with the heel up and hitting it more on the toe etc., etc. for a specific shot.

As I said, I have no horse in this race. Just commented on what I saw (or thought I saw). I suppose to find out for sure you'd have to ask Federer what happened on that shot. Was it a mis-hit or was it an intended top spin shot.

I played both golf and tennis in high school. I never had anyone associated with tennis tell me to intentionally miss hit a tennis shot.
 
the sheer insinuation that a pro golfer with a "force across the shaft" impact has more of a chance to resist the twisting that is involved with an off center hit is folly......d bag folly

I know one day you will win this argument. And the one about the line of compression . And the one about whatever else it was Brian was talking about 5 years ago. All 2 of your foes will be sorry and golf instruction will be so much better off.
 

Kevin Shields

Super Moderator
I know one day you will win this argument. And the one about the line of compression . And the one about whatever else it was Brian was talking about 5 years ago. All 2 of your foes will be sorry and golf instruction will be so much better off.

And your point is?
 
Exactly. What is the point in debating a few buffoons that have obviously been on the wrong side of the argument for several years?

what you say is obvious is not so obvious to some unsuspecting folks.......and here we are........

i'm "debating" these fools because they intentionally try to smear brian and go out of their way to spread nonsense....if you don't want to follow the tired arguments, please scroll past....

i apologize to no one for exposing these guys over and over and OVER again....sorry to interrupt your free learning
 
This is spot on for a Western-grip player but back in the day there was a Continental-grip player named Rod Laver that could turn it over from the bottom of the ball. Harry Hopman acknowledged it distinguished Rodney from his peers. If you ever saw his left forearm it would be obvious why.

Preposterous nonsense. In tennis as in golf you do not roll the face during impact interval to create shots regardless of grip period. In tennis thats what people sometimes try before they learn how to do it right (spin shots) Par Hunter is 100% correct.
In tennis the ball is on the strings a long time relative to golf yes. String it loose like Mcenroe did and its there forever if you meet the flight of the ball correctly. Nevertheless spin is a function of face angle and path. Do not forget ping pong either-if you do not have enough speed on the paddle to overcome the spin being hit to you you're cooked-similar to tennis.
People often have this ridiculous idea that in tennis you roll the face to spin it-thats why they stink at tennis.
Golf seems similar to me.
The very idea one could do anything DURING impact in golf is beyond nonsense.
 
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Preposterous nonsense. In tennis as in golf you do not roll the face during impact regardless of grip period. In tennis thats what people sometimes try before they learn how to do it right (spin shots) Par Hunter is 100% correct.
In tennis the ball is on the strings a long time relative to golf yes. String it loose like Mcenroe did and its there forever if you meet the flight of the ball correctly. Nevertheless spin is a function of face angle and path. Do not forget ping pong either-if you do not have enough speed on the paddle to overcome the spin being hit to you you're cooked-similar to tennis.
People often have this ridiculous idea that in tennis you roll the face to spin it-thats why they stink at tennis.
Golf seems similar to me.
The very idea one could do anything DURING impact in golf is beyond nonsense.

This is what I did, until I finally listened to my coach.
 
what you say is obvious is not so obvious to some unsuspecting folks.......and here we are........

i'm "debating" these fools because they intentionally try to smear brian and go out of their way to spread nonsense....if you don't want to follow the tired arguments, please scroll past....

i apologize to no one for exposing these guys over and over and OVER again....sorry to interrupt your free learning

I think the point is that this stuff happens like this:

The Manzella team presents findings. The "buffoons" argue that the findings are not right because that isn't what it looks like on the Casio, then call people names on their own site. And somehow they think it's the folks over here that are the Dbags?
 

leon

New
Kind of looks like it did to me, if you look at the grip tape once the ball is gone.

Some things to think about:

Tennis ball impact duration is approx 10 times that of a golf ball
Tennis ball is a bit heavier (approx 20%) than a golf ball
Tennis racket is likely much stiffer in torsion than a golf shaft (I don't have numbers, but much larger "diameter" and thicker wall if I recall - have seen both being made)
Racket handle much shorter than club shaft, so higher bending stiffness too
You can hit a tennis ball a LOT further away from the centre of mass

Does this tell you anything?

As there were no takers, what I was getting at was this. The only way to rotate the face is to apply rotational force to the handle. This has to be transferred by shear stress along the shaft to get to the clubhead. These stresses can only travel at a certain velocity, depending on the shaft stiffness, which is a function of its material and geometry. If anyone has any shaft data let me know and I'll calculate the travel time - and I'll bet one shiny (virtual) penny that its way more than the impact duration.

Or, what Brian said :)
 
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Preposterous nonsense. In tennis as in golf you do not roll the face during impact interval to create shots regardless of grip period. In tennis thats what people sometimes try before they learn how to do it right (spin shots) Par Hunter is 100% correct.
In tennis the ball is on the strings a long time relative to golf yes. String it loose like Mcenroe did and its there forever if you meet the flight of the ball correctly. Nevertheless spin is a function of face angle and path. Do not forget ping pong either-if you do not have enough speed on the paddle to overcome the spin being hit to you you're cooked-similar to tennis.
People often have this ridiculous idea that in tennis you roll the face to spin it-thats why they stink at tennis.
Golf seems similar to me.
The very idea one could do anything DURING impact in golf is beyond nonsense.

Isn't the difference with tennis, and especially table tennis, that to return a ball that's already loaded with topspin and not have it balloon high off your racquet - you may need to close the face down (negative dynamic loft in golf parlance)?

Getting that face delofted can feel like a roll - and I think some beginners confuse that feel, which counters their opponent's topspin, with the face and stroke geometry that creates their own topspin.
 
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