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Throw angle is a bunch of bull too

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Topic: Throw angle is a bunch of bull too
Posted By: pnachtwey
Subject: Throw angle is a bunch of bull too
Date Posted: 05/06/2010 at 11:14pm
SD

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I TT therefore I am



Replies:
Posted By: Rich215
Date Posted: 05/06/2010 at 11:23pm
How many different rubbers have you tried on the same blade.....and how many blades have you tried with the same rubber?




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Posted By: haggisv
Date Posted: 05/06/2010 at 11:26pm
The throw angle is the angle the ball comes off with you loop it. If you loop the same ball (with backspin or topspin) and have one bat with Bryce and one with T05, you'll see how much higher the T05 comes off. The difference is the throw of the rubber.

As an engineer, you should look at the data (evidence) first, before dismissing a theory because it seems like bull to youWink. A good engineer can always find a theory to suit the data! LOLLOLLOLBig%20smile


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Smart; VS>401, Dtecs OX
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Posted By: tpgh2k
Date Posted: 05/06/2010 at 11:37pm
you can look at it like this....the topsheet of a rubber is the main reason behind "throw angle". if a topsheet is super sensitive to spin, the ball will kick up like crazy when blocking a loop (with an open blade face perpendicular to the table). a rubber that is less sensitive to spin (we'll say anti-spin so that you can see the other extreme) will have no reaction to spin...so the ball will just bounce back forward with little height.

hope that helps.


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Timo Boll Spirit FL
H3 Blue Sponge Black FH
Tenergy 64 Red BH



Posted By: pnachtwey
Date Posted: 05/06/2010 at 11:54pm
A

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I TT therefore I am


Posted By: Leshxa
Date Posted: 05/07/2010 at 12:01am
Its all a property of topsheet, sponge, and blade flexibility and rigidity.

All topsheets are different and so is the pimples pattern in them. Depending on how the pimple bend into the sponge will yield to different results.

I would suggest contacting table tennis engineers for details. I am sure if you call up Yasaka or Stiga, they would provide you the answers.


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Back to table tennis...


Posted By: Conan the Greek
Date Posted: 05/07/2010 at 12:14am
Originally posted by pnachtwey pnachtwey wrote:

I am a relative TT rookie but I am an experience engineer and I think the talk about throw angle is BS. I would like to see some evidence that an engineer would believe that one rubber or blade throws higher or lower than another.


As an engineer, it should be intuitive that different pip patterns, sponge rebound rates, sponge hardness, topsheet grip and hardness would all have an impact on throw angle.

As for a higher throw from countering a loop as opposed to hitting a chop... well, you did say you were a relative TT rookie. But consider a very close / slow motion look at the direction of rebound of the ball from a stationary grippy surface when the ball has backspin compared to topspin.



Posted By: pushchop
Date Posted: 05/07/2010 at 12:25am
This video should prove it for you.  Start at 2:20.  They are comparing old vs. new Outlaw, but as you can see the trajectory is somewhat different even between old and new.

Zero user variables in play, since blade is held by fixed clamp, with robot shooting the balls at fixed speed/spin.



Posted By: BMonkey
Date Posted: 05/07/2010 at 12:40am
Originally posted by pnachtwey pnachtwey wrote:

I am a relative TT rookie...
It shows Wink


Posted By: haggisv
Date Posted: 05/07/2010 at 1:12am
Originally posted by pnachtwey pnachtwey wrote:


Not everyone is a looper. Is this a good way to rate a blade or rubber? A lot depends on the play. I am suggest that the paddle be place stationary on a table and the ball drop at the paddle with various spins and angles so only the blade and the rubber are tested, not the player.

It's just one parameter of a rubber, and it may not be useful to everyone.

Originally posted by pnachtwey pnachtwey wrote:

Quote
If you loop the same ball (with backspin or topspin) and have one bat with Bryce and one with T05, you'll see how much higher the T05 comes off.

But this is player dependent and subjective.

Yes it is, but we're not looking a number here, we're just looking whether it's high, medium or low. This can usually be judged well enough by players that have used a fwe rubbers.

Originally posted by pnachtwey pnachtwey wrote:

Quote
The difference is the throw of the rubber.As an engineer, you should look at the data (evidence) first,

That is what I am looking for. So far I have only seen opinions. I know that I can do meaningful tests by dropping balls on paddles with controlled spins and at different angles of incidence.   Show me where this has been done and I will believe.

I know it's real from personal experience, but accurate throw numbers are not useful, as they vary too much between styles/strokes. Usually you only want to know if it's high or low compared to other rubbers.
I'm sure a setup could be used to prove the concept, but it will be quite complex, and you'd have to ask yourself if it's worth the effort...

Originally posted by pnachtwey pnachtwey wrote:

Originally posted by haggisv haggisv wrote:


The throw angle is the angle the ball comes off with you loop it.

What about when a playing against a chopper? My T05's throw is mighty low and it takes great care to keep the ball from going straight down into the table or into the net. It is obvious that the opponent has a great effect on the 'throw'.

The point is that it will still be higher throw than if you looped the same ball with a low-throw rubber. This is what makes it high... it's a relative term compared to other rubbers.


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Smart; VS>401, Dtecs OX
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Posted By: tpgh2k
Date Posted: 05/07/2010 at 1:22am
well said haggis! +10000000000000000000000000

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Timo Boll Spirit FL
H3 Blue Sponge Black FH
Tenergy 64 Red BH



Posted By: Speedplay
Date Posted: 05/07/2010 at 1:24am

posted by pnachtwey What about when a playing against a chopper? My T05's throw is mighty low and it takes great care to keep the ball from going straight down into the table or into the net. It is obvious that the opponent has a great effect on the 'throw'.



This is not the throw that comes in to play, the throw comes in to play when you actually manage to loop the ball. You might still hit the net, but the arc of the ball is high with T 05, while it is low with Mark V m2. This is not because of the player, cause I've used them both and when I switched to T 05, I had to change my bat angle for my loops, cause they where way to high.

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The holy grail


Posted By: ppmax
Date Posted: 05/07/2010 at 1:39am
pnachtwey,

You misunderstood what throw meant. Hope others have made it clear.

You have a good idea about quantifying throw of rubbers using a standardized test method. How to do it would be a good topic.



Posted By: JKC
Date Posted: 05/07/2010 at 3:13am
Has Sid returned?

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Posted By: debraj
Date Posted: 05/07/2010 at 3:34am
Originally posted by JKC JKC wrote:

Has Sid returned?


.... +1

or Varghese   

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729-F1||Rhyzm-P(FH)|| Rasant Grip orRhyzm-P max(BH)
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Posted By: APW46
Date Posted: 05/07/2010 at 3:55am
Originally posted by pnachtwey pnachtwey wrote:

I am a relative TT rookie but I am an experience engineer and I think the talk about throw angle is BS.

 I'm a relative Engineering Rookie, but I think that Newtons law of Motion is Bullsh*t...........Imagine if I wrote that on an Engineering forum, and you can get an Idea of how you look on a TT forum, sillyLOL

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The Older I get, The better I was.


Posted By: haggisv
Date Posted: 05/07/2010 at 7:17am
Originally posted by APW46 APW46 wrote:

Originally posted by pnachtwey pnachtwey wrote:

I am a relative TT rookie but I am an experience engineer and I think the talk about throw angle is BS.

 I'm a relative Engineering Rookie, but I think that Newtons law of Motion is Bullsh*t...........Imagine if I wrote that on an Engineering forum, and you can get an Idea of how you look on a TT forum, sillyLOL

ROFL!!!LOLLOLLOL


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Smart; VS>401, Dtecs OX
http://tabletennisshop.com.au/index.php?main_page=page&id=42" rel="nofollow - Tenergy Alternatives | http://tabletennis-reviews.com" rel="nofollow - My TT Articles


Posted By: murrayblhrc
Date Posted: 05/07/2010 at 9:37am
Originally posted by pushchop pushchop wrote:

This video should prove it for you.  Start at 2:20.  They are comparing old vs. new Outlaw, but as you can see the trajectory is somewhat different even between old and new.

Zero user variables in play, since blade is held by fixed clamp, with robot shooting the balls at fixed speed/spin.



I think this video's interesting, but factors such as the rebound effect tested in the beginning are hard to consider, especially because blade angle factor plays such a large roll in determining the rebound height, length.

On the same topic, it is clearly visible in the video that the ball would hit the bat angled in the vise and slightly move, thus completely changing the results drastically of even the trial being tested.............


Posted By: pushchop
Date Posted: 05/07/2010 at 11:02am
Pnachtwey, swap out one of your T05 with a $5 sheet of low throw 729 Lightening from zeropong.com.  Now compare the throw angles on FH.

At that very instance, clouds in the sky will part, sunshine will pour down on you, angels will sing, and a big halo will form around your head.  Well, maybe not.  But at least you'll prove to yourself what throw angle describes.  :-)

Hey murrayblhrc, yes, it's no science lab but I applaud them for the effort trying to be objective. 


Posted By: cole_ely
Date Posted: 05/07/2010 at 11:43am
Throw angle has a lot to do with the pips from my experience.  Tall pips can get underneath the ball and push it up.  Flat or big pips don't do that and tend to send the ball in a straighter path.  I first figured this out when comparing the 729 sst (tall) pip with the stranger shaped ritc 2000.
 
The base sheet seems to be pretty simlar, but the pips of the 2000 definitely seem to play "flatter."
 
Topsheet tackiness only adds to throw angle in terms of its' reaction to spin.  I don't consider this a true contributor to throw angle.
 
That said, I think it's fairly minimal between most rubbers and will easilly be compensated for with a little getting used to any rubber.  It's certainly not as big of a deal as made out to be by some people on forums.  Most of them probably hit the ball long and then blame it on their high throw rubber, or vice versa.


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Wavestone St with Illumina 1.9r, defender1.7b

Please let me know if I can be of assistance.


Posted By: Baal
Date Posted: 05/07/2010 at 2:10pm
Blades have different throw angles too.


Posted By: debraj
Date Posted: 05/07/2010 at 3:33pm
Originally posted by pnachtwey pnachtwey wrote:

   I am suggest that the paddle be place stationary on a table and the ball drop at the paddle with various spins and angles so only the blade and the rubber are tested, not the player.


Wrong experiment design:
- it has to be vertical to account for the gravitational force field

but even then drop a forward or backward spinning ball at an angle on glass and then on rubber. if the throw angle differs.. that means it is friction dependent... and you can infer why rubbers with diff friction (and other factors too) differ in throw angle

Originally posted by pnachtwey pnachtwey wrote:


But this is player dependent and subjective.


right. player dependent means not their 'face'... but the pressure they exert or angle the contact or speed of contact etc... which are all physical variables.

Originally posted by pnachtwey pnachtwey wrote:


That is what I am looking for. So far I have only seen opinions. I know that I can do meaningful tests by dropping balls on paddles with controlled spins and at different angles of incidence.   Show me where this has been done and I will believe.


huh! lets see... people in forum who are dying to make pnatchweywawawawhosoever believe.. please create a fund and contribute. Or else you know what will happen?

HE WONT BELLLLIIIIIEEEEEVE!!

ooops. sorry i wish i was one ;)

Originally posted by pnachtwey pnachtwey wrote:


What about when a playing against a chopper? My T05's throw is mighty low and it takes great care to keep the ball from going straight down into the table or into the net. It is obvious that the opponent has a great effect on the 'throw'.


You are right! ... by throw we usually mean throw on a topspin ball. If you consider backspin... it will be a mirror ...so T-05 will have lower throw than say Super Anti.

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729-F1||Rhyzm-P(FH)|| Rasant Grip orRhyzm-P max(BH)
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Posted By: nathanso
Date Posted: 05/07/2010 at 3:39pm
Originally posted by Baal Baal wrote:

Blades have different throw angles too.
Absolutely. As a blade tester for BBC I can verify this.

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BBC, SP, LP


Posted By: hojim
Date Posted: 05/07/2010 at 5:13pm
Originally posted by nathanso nathanso wrote:

Originally posted by Baal Baal wrote:

Blades have different throw angles too.
Absolutely. As a blade tester for BBC I can verify this.
I don't doubt you, can you explain this one as there is no  contact with the actual ball and blade. I do however agree that different rubbers have different throw angles. I know that blades of different hardness will affect the bounce but the actual throw...???

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American Hinoki 2 ply POC/NWC Shake FL Rakza 7 FH Boost TS BH (testing)
1 ply Hinoki shake FL FH Rakza BH Pride 30
San Wei A5 FH Rakza 7 BH Pryde 30


Posted By: yogi_bear
Date Posted: 05/08/2010 at 10:10pm
sid alert???

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Independent online TT Product reviewer of XIOM, STIGA, JOOLA, SANWEI, GEWO, AIR, ITC, APEX, YASAKA and ABROS

ITTF Level 1 Coaching Course Conductor, ITTF Level 1 Coach


Posted By: Thaidog
Date Posted: 05/08/2010 at 10:41pm
I would agree that the term "throw angle" is the first thing I see taken out of context and is usually more subjective than a scientific mark on how something is playing for somebody. Due to the fact that no two wooden blades are the same and no two people play the same throw angles tend to vary... but both blades and rubbers do have throw angles and those angles combined do create a throw when looping or spin is involved. The problem when using this as a measure for how either a blade or a rubber is supposed to play or behave is that there is too much variance as described above to take this as anything but subjective feel for how this or that is playing. A peice of 1.9mm tenergry on a stiff blade will have a much lower throw than a 2.1mm sheet on a OFF- blade while looping but at low speeds the throw will be more similar due to the fact that the ball is interacting less with the wood / sponge and more with just the topsheet.


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Timo ALC FL

Tibhar Grip S MAx

Tenergy 64 FX National 2.1mm

He never boosts... of course he never had to...


Posted By: pnachtwey
Date Posted: 05/09/2010 at 3:01pm
AS

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I TT therefore I am


Posted By: Jonan
Date Posted: 05/09/2010 at 3:13pm
^

Above wall of text is too long.

Did not listen!


Posted By: Heimdallalso
Date Posted: 05/09/2010 at 3:30pm
Originally posted by pnachtwey pnachtwey wrote:

Well at least blah blah blah blah blah... ad nauseam
APW46, you are on my s-list.
Finally, haggisv, what kind of moderator are you that allows misquotes and think it is funny? I never said that Newton's laws of motion are BS just the way the term throw gets used and its subjective nature.


pnachtwey, I get that you want a more quantifiable rubric as it applies to TT gear... I do.

BUT

You better wash your hands, well, that's after you walked in here & handed all of us our asses.
This forum was plugging along quite nicely before you came along to tell us how we are doing it all wrong!
Calling out haggisv on his rightly carrying about his duties as a moderator?
Preposterous!

putting APW46 on your "s-list"???
That's rich!
I'll let you know right now; he will loose no sleep over it!!!

Picture the forum like someones living room.We've all been invited to a party! On any given night & we are all just guests, coming & going.

I'm going over to the other side of the room now.
Good Day & Good Hitting.
Smile

 


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NEXY Lissom st 85g
fh/ Andro Impuls Speed max
bh/ Palio Flying Dragon 1.8


Posted By: Baal
Date Posted: 05/09/2010 at 3:34pm
I would argue that very few things in all of sports are as precise as the feel that a 2000+ level table tennis player has for the way a blade or blade-rubber combination plays.  It is the same precision that professional musicians have for their technology and it is just as mysterious to rookies.  Throw angle is a pretty good term and other people at similar playing levels and with similar styles of play -- that is to say, not TT rookies -- know what is meant.

As for believing what the manufacturers say about their products, well anyone who is not a TT rookie knows that most companies either tell you nothing useful about how it plays, or they will simply claim that product X has more speed, more spin, AND YET more control too!!!  The only way to know is to try something, or to talk to people who you know have the experience and playing level to be a reliable source.  One thing is for sure, most of the time too frequent equipment changes will retard your development as a player.    


Posted By: pushchop
Date Posted: 05/09/2010 at 3:40pm
pnachtwey, I understand what you are saying -- that the term "throw angle" is not technically correct.  It's really the measured exit angle of ball deflection from fixed-angle bat at fixed speed with an incoming no-spin ball.  Whew, think I lost some brain cells writing that!

But there is no industry-wide standard for this measure, and remember, not everyone is lucky enough to be engineer with physics degree, so we simplify and talk about LOW, MED, HIGH throw angle simply to determine if we wanna blow our paycheck EJ'ing on another rubber.  :-)


Posted By: Baal
Date Posted: 05/09/2010 at 3:40pm
By the way, there are engineers out  there who claimed that it was complete bullsh*t that musicians claimed that a Stradivarius violin had special properties.  That is why those of us who are actually real scientists make fun of certain classes of engineers -- the  village idiots who think that nothing exists that cannot be reduced to a set of differential equations.  Wiser engineers live by a different creed -- never trust anything built or designed by an engineer!


Posted By: BMonkey
Date Posted: 05/09/2010 at 3:57pm
I don't think this guy is the second coming of Sid, but he is just as annoying. Dead


Posted By: ztec
Date Posted: 05/09/2010 at 4:29pm
Ok, so you can say that throw angle is not the best term, nor is it without variables and yes, there can be better ways to term this so called "throw". Though I happen to think you're pulling this overboard in your desire to attach a perfect word/description and numerical system to something as ambiguous as "throw angle".

IMO, when most people discuss throw angle on this forum, it's with the assumption that if they ask whether rubber A or rubber B has a higher throw angle, they will receive an answer from someone who has tried both rubbers on the same blade, and has done enough practice with the same shots/opponents they usually play with at their local club or wherever they practice to notice a difference in how the rubbers perform. Most of us aren't looking for an answer along the lines of rubber A would be value X and rubber B would be value Y; we're satisfied enough with an answer that just qualitatively tells us that other players thought rubber A has a higher "throw" than rubber B, or vice versa. Will there be disagreements? Most likely yes, nobody has the same stroke or opponent (sometimes opponent if people happen to be playing at the same club), and hence a general consensus is usually what's looked for, not specific answers.

If you want specifics, you can either conduct your own tests that you've already suggested, or you can try and contact manufacturers and see what they have to say. I think you've already exhausted enough out of this topic here to realize you're on a wild goose chase here since we don't have the answer that you're looking for or already have in your head. There's no sense in arguing over something that you're not getting an answer to, either go find your answer through other means or just let it go and keep hitting, I'll stick with the latter myself. 

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Your play will change your opinion of your equipment more than your equipment will change your opinion of your play.


Posted By: Conan the Greek
Date Posted: 05/09/2010 at 4:41pm

A good engineer would understand that he doesn't have enough information to analyze before making rash statements and claims such as whats.his.name did.

A bad engineer would jump to conclusions before he figured out what he doesn't know.

We seem to have been shown into which category pnachtwey falls. And so with it his credibility.



Posted By: haggisv
Date Posted: 05/09/2010 at 8:02pm
Originally posted by pnachtwey pnachtwey wrote:


In response to haggisv.
Yes, I am looking for a number or better yet a graph that indicates how a ball will bounce of a blade or rubber at different angles or speeds. That would mean something because then graphs between different blades and rubbers can be compared and the player stroke and opinion are removed from the evaluation.

Haven't any of you wondered why you can't find throw ratings for blades and paddles?    

Well you may seek, but I don't think you'll find.Big%20smile It is difficult to quantify this property, as it also varies depending on the angle you hit the ball,  the speed you hit the ball and possible some other variables. For example some rubbers have a much higher throw at high speed than at low speed. Both the topsheet and the sponge, as well as the interaction between the 2, come into effect. Even if you could get some measure of the throw, it would be highly dependent on other variables, making the results hard to understand, and therefore meaningless to  most people.

The reason there are no throw rating for rubbers/blades/bats from manufacturers is that it's not in their interest to do so. Most of the stats they publish have more to do with marketing than anything useful. There are no standardised methods for measuring speed, spin and control either, because it's not in their interest to do so (as well as being too hard as they also depend on many other variables). If there were such test, you would discard half the rubbers on the market by simply looking at the stats...which not only will disadvantage some of the manufacturer, but it's also deceiving the customers, as you cannot characterise a rubber simply by a small set of numbers....


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Smart; VS>401, Dtecs OX
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Posted By: nathanso
Date Posted: 05/09/2010 at 8:56pm
The only remaining question in my mind is, why didn't I unsubscribe from this thread earlier?

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BBC, SP, LP


Posted By: Thaidog
Date Posted: 05/09/2010 at 10:28pm
Originally posted by Baal Baal wrote:

Wiser engineers live by a different creed -- never trust anything built or designed by an engineer!


LOL  Exactly! Everything ever built by an engineer started from a fit of subjective rage!

@pnachtwey - Don't hate the player hate the game... the term throw angle is just a stupid buzz word that will be around as long as there are rookies to utter it. I admire your scientific demeanor but know your limitations... you'll get banned from this forum way sooner than you'll stop the throw angle madness believe me.





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Timo ALC FL

Tibhar Grip S MAx

Tenergy 64 FX National 2.1mm

He never boosts... of course he never had to...


Posted By: dauntless
Date Posted: 05/09/2010 at 10:53pm
I am entering the fray:

Throw angle refers to a blade and rubber combination's propensity to "throw" the ball either low, medium, or high, assuming ball speed, spin, blade angle and momentum being the same. Perhaps the nomenclature leaves a lot to be desired. How does exit angle sound? Exit parabola? Throw vector?

It is something that takes experience to understand, and using a lot of different equipment over a period of time helps. It IS a subjective phenomenon but there are some common characteristics that one can say a particular rubber has or does not have.

I have a proposition for you:
I say Outlaw MAX is lower throw than Tenergy 05 2.1 on the same blade- prove me wrong. For a guy with an engineer's salary, you should be able to afford and perform this experiment yourself.
--
Before you say that "throw angle is a bunch or bull", perhaps you should indicate how much actual experience you have with testing, using, and comparing different blade/rubber combinations. Saying that you are relatively new to TT but an engineer means little to those who have experience with the effect of throw.

Sounds to me like a person who likes to boast about having an engineering background (as if that qualifies you to understand EVERYTHING) and who gets off on being an argumentative and obnoxiously self-assertive arrogant poster.




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1. BTY Primorac, Nittaku H3N, T64 2. BTY Primorac, H3N, Mendo MP http://mytabletennis.net/forum/forum_posts.asp?TID=56416 - Feedback


Posted By: Thaidog
Date Posted: 05/09/2010 at 11:06pm
Originally posted by pnachtwey pnachtwey wrote:

Well at least pushchop found some useful information but notice that when doing test with the robot the blade is stationary and not 'throwing' anything.


There is a bit of bend and rebound with OFF/OFF- blades and down. Hard to measure but if you were to look at how a tennis racket bends and snaps back you can easily measure this "throw". Some brands even try to increase this with different technologies... like Yonex rackets "OPS" system. Obviously this throw does not really add any speed but does help create spin.


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Timo ALC FL

Tibhar Grip S MAx

Tenergy 64 FX National 2.1mm

He never boosts... of course he never had to...


Posted By: Thaidog
Date Posted: 05/10/2010 at 12:24am
After some digging I found a good video on throw angle - it is explained at the end:

http://www.youtube.com/user/ttCountenance#p/u/4/It8TmpL7U9w


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Timo ALC FL

Tibhar Grip S MAx

Tenergy 64 FX National 2.1mm

He never boosts... of course he never had to...


Posted By: hojim
Date Posted: 05/10/2010 at 12:41am
lol......... good thing it was not a concrete floor

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American Hinoki 2 ply POC/NWC Shake FL Rakza 7 FH Boost TS BH (testing)
1 ply Hinoki shake FL FH Rakza BH Pride 30
San Wei A5 FH Rakza 7 BH Pryde 30


Posted By: pushchop
Date Posted: 05/10/2010 at 12:54am
If ITTF sees that vid, they might require hockey helmets for 2011.  And jockstraps -- that throw angle was rather low, ouch!  Haha...


Posted By: hungry cow
Date Posted: 05/10/2010 at 4:24am
Originally posted by pnachtwey pnachtwey wrote:

I am a relative TT rookie but I am an experience engineer and I think the talk about throw angle is BS. I would like to see some evidence that an engineer would believe that one rubber or blade throws higher or lower than another.


My Dad is an engineer who tried playing hardbat after always playing sponge.  Every ball not even going to the net with the same stroke as he used with sponge was all the evidence he needed that different equipment has different throw angle!  I wonder if he could find any evidence of a difference in throw angle between Tenergy 05 and anti......

By the way, even Sid realizes throw angle is real as I have talked to him about different rubbers throw angles, although he might argue about which throw angles work better for a convex or concave looping motionLOL

Different throw angles do give more control to different stroke styles.  My natural looping motion works best with a higher throw rubber as I really come over the ball allot so I use Desto f3 for good control for me.  Other people hit more through the ball and will have better control with a rubber like Sriver with a lower throw.



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70s Stiga Stellan Bengtsson

FH - Mark V 2.0

BH - Donic Bluefire JP 03 2.0


Posted By: wfberkhof
Date Posted: 05/10/2010 at 9:45am
The real question of course is, what is a rookie doing with T05's? :)

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I'm a tt-trainer with 18 years of experience.

Waldner Black Devil CB with LKT Pro XP (2.2mm) and 729 FX Super Soft (2.2mm)


Posted By: Speedplay
Date Posted: 05/10/2010 at 10:10am
Originally posted by wfberkhof wfberkhof wrote:

The real question of course is, what is a rookie doing with T05's? :)


ROFL!

Can't believe we all missed that, but you are totally right with this question!

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The holy grail


Posted By: pnachtwey
Date Posted: 05/11/2010 at 2:01am
AS

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I TT therefore I am


Posted By: debraj
Date Posted: 05/11/2010 at 2:33am
"
debraj, compensating for gravity is easy. That is why I suggested dropping or shooting the ball downward.   It is easier to measure the horizontal distances and velocities due to friction if the ball is dropped or shot straight down.   You forgot the obvious and bigger problem, air resistance. Air resistance is non-linear so it requires quite a bit more math to compensate for. "

how could additional kinetic energy replace a force field?
Throwing a ball faster in space is same as throwing a slower projectile under continuous accelerating force (gravity)???

anyway... i see so many theory errors.. and this is just one of them.. i'm out of this discussion it will take months to take individual points and explain... and after all that there is no prize.. except someone saying..."okay this needs to be discussed more" ..

whatever... if you play you know when you change your rubber the same player and block strokes that he couldn't with another rubber ... in spite of same speed.

and also... i think the spinmantra.com can hire you for neo-physics laws. the owner there himself comes up with quite a few of them. :)


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729-F1||Rhyzm-P(FH)|| Rasant Grip orRhyzm-P max(BH)
http://youtu.be/y9y9nE9g778" rel="nofollow - vid1
http://youtu.be/xqNy786yGOs" rel="nofollow - Vid 2


Posted By: Speedplay
Date Posted: 05/11/2010 at 3:00am
Originally posted by pnachtwey pnachtwey wrote:



Some astute person did post something about trust and that was the most intelligent response so far.


Who died and made you the judge of what's intelligent or not? The fact that some one agrees with you don't make it intelligent.

Play with 10 different rubbers on the same blade, use the same motion for your strokes and then tell me the ball don't behave differently when it comes to throw angle.

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The holy grail


Posted By: dauntless
Date Posted: 05/11/2010 at 3:26am
Originally posted by Speedplay Speedplay wrote:

Originally posted by pnachtwey pnachtwey wrote:



Some astute person did post something about trust and that was the most intelligent response so far.


Who died and made you the judge of what's intelligent or not? The fact that some one agrees with you don't make it intelligent.

Play with 10 different rubbers on the same blade, use the same motion for your strokes and then tell me the ball don't behave differently when it comes to throw angle.


Exactly. Some things don't need to be explained by numbers.
The "numbers" are all going to be subjective and partial.
Why?
Difference in:
blade
rubber
glue
technique
altitude
humidity

Why don't you just test your ball dropping theory and let us know how it turns out? A real engineer/scientist doesn't need anyone else to give them kudos for rhetoric. We don't care if you "need numbers". If it pleases you to perform some experiments, and the data you find is compelling, please come back and explain it all to us. Until then, are you unable to buy a sheet of some "bull" low throw rubber and test it out?

If you are truly interested in proof, you would actually be doing an experiment of your own like ALL of the people who have commented here regarding throw & different rubber/blade combos.  Instead you are talking about it.

That only leaves one answer, and it isn't something to be ashamed of. Being broke isn't something I will make fun of. But when you do get the funds to actually BUY some other rubbers and test them, you will be amazed at what happens. Voila: THROW ANGLE exists, yay!




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1. BTY Primorac, Nittaku H3N, T64 2. BTY Primorac, H3N, Mendo MP http://mytabletennis.net/forum/forum_posts.asp?TID=56416 - Feedback


Posted By: Heimdallalso
Date Posted: 05/11/2010 at 3:26am
Originally posted by Speedplay Speedplay wrote:

Originally posted by pnachtwey pnachtwey wrote:



Some astute person did post something about trust and that was the most intelligent response so far.


Who died and made you the judge of what's intelligent or not?


+1

Originally posted by dauntless dauntless wrote:

I am entering the fray:

Sounds to me like a person who likes to boast about having an engineering background (as if that qualifies you to understand EVERYTHING) and who gets off on being an argumentative and obnoxiously self-assertive arrogant poster.



an arrogant jag for sure
worse yet, a condescending JAG

we all have some knowledge but look at his posts
it's fairly clear to draw from his own words;
only he can rightly see

this is a quality he shares with ole siddo
well that & the whole jag angle
yet to show any capacity (whatsoever) for his part in a matter

look, I'm an arrogant jag
so I know one when I see one

and just for you pnachtwey
http://jag.urbanup.com/439877 - 1. Jag http://www.urbandictionary.com/define.php?term=jag# -


http://www.urbandictionary.com/products.php?term=Jag&defid=439877 - buy jag mugs, tshirts and magnets
an irritating individual with no sense of a social filter and no realization of the implication of his actions; socially inept.
"Did you hear the ludicrous things that guy was saying? What a jag!"






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NEXY Lissom st 85g
fh/ Andro Impuls Speed max
bh/ Palio Flying Dragon 1.8


Posted By: dauntless
Date Posted: 05/11/2010 at 3:31am
This guy has got to be just messing with us. It is just too improbable that someone is that dense. Come on, admit it. You are just messing with us, right? right???

Clap Ok, ok.... you got me. It was all a joke, and I took him seriously.

God I feel so stupid.
I almost cussed at this guy. LOL. Dead
Truly great joke. You had a few of us going for sure... myself included. He is an engineer alright... a BS engineer. You are an artist my friend.


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1. BTY Primorac, Nittaku H3N, T64 2. BTY Primorac, H3N, Mendo MP http://mytabletennis.net/forum/forum_posts.asp?TID=56416 - Feedback


Posted By: tdragon
Date Posted: 05/11/2010 at 3:32am
Sound like SID LOLLOL


Posted By: APW46
Date Posted: 05/11/2010 at 5:18am
Originally posted by pnachtwey pnachtwey wrote:



APW46, you are on my s-list.
Oh Goody, Am I top?
 
'Throw' in TT terms is a term not derived at by exact science, more the result of 1000's of TT players evolving a term to describe the differing characteristics of many variables of equipment when subjected to incoming spin and pace from a ball, the term if you like, is a players opinion of the result of the amalgamation of certain variables, which he/she makes a judgement upon, based on his/her experiences of playing with other equipment, not scientific, but non the less, reality.


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The Older I get, The better I was.


Posted By: Speedplay
Date Posted: 05/11/2010 at 8:56am
Originally posted by pnachtwey pnachtwey wrote:


Finally, haggisv, what kind of moderator are you that allows misquotes and think it is funny? I never said that Newton's laws of motion are BS just the way the term throw gets used and its subjective nature.


Now, where have you been quoted saying this? APW quoted you, when you said you were a TT rookie and then he added his message that he was a engineer rookie who thought Newton's laws of motion are BS.

So, I haven't seen any one changing your original statements to make you look stupid, as there is no need to change them to achieve this, you are doing this fine on your own.

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The holy grail


Posted By: hungry cow
Date Posted: 05/11/2010 at 9:27am
I highly doubt this person actually has an engineering degree, if so they would understand the scientific method

1. State the problem
2. Research the problem
3. State the hypothesis
4. Test the hypothesis
5. Analyze the results
6. State the conclusion
7. Repeat the work

He has only done the first three steps and thinks he can make his hypothesis into a law.  The rest of us actually have tested the hypothesis, analyzed the results, stated the conclusion we have found, and repeated the work finding the results repeat themselves.  So according to the scientific method we are all much more qualified to make a theory about throw angle than this supposed "engineer" who makes self righteous theories after only going through the first three steps of the scientific method.

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70s Stiga Stellan Bengtsson

FH - Mark V 2.0

BH - Donic Bluefire JP 03 2.0


Posted By: zrrbiteDK
Date Posted: 05/11/2010 at 9:44am
Pnacht, what exactly are you trying to prove with this thread? It's impossible to prove or disprove a term that is not quantifiable within the realm of science, as it's already been stated.

Any experienced player will tell you that "throw" is an important parameter and that they'll pick their equipment depending on throw values, because throw directly impacts how your play holds up with the personal style of play defined by our neural pathways. 

Tact is proving a point without offending anyone in the process. You sir, have none!


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Current:

Avalox BT777 / ? / ?


Posted By: Rich215
Date Posted: 05/11/2010 at 9:56am
Hi SID.    Still upset you got punted twice from here?  




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Posted By: Heimdallalso
Date Posted: 05/11/2010 at 12:39pm
http://mytabletennis.net/forum/forum_posts.asp?TID=33879&KW=&PID=414956#414956 - when multiple identities "meet"

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NEXY Lissom st 85g
fh/ Andro Impuls Speed max
bh/ Palio Flying Dragon 1.8


Posted By: Conan the Greek
Date Posted: 05/11/2010 at 2:19pm
Originally posted by hungry cow hungry cow wrote:

I highly doubt this person actually has an engineering degree, if so they would understand the scientific method

1. State the problem

2. Research the problem

3. State the hypothesis

4. Test the hypothesis

5. Analyze the results

6. State the conclusion

7. Repeat the work

He has only done the first three steps and thinks he can make his
hypothesis into a law.� The rest of us actually have tested the
hypothesis, analyzed the results, stated the conclusion we have found,
and repeated the work finding the results repeat themselves.� So
according to the scientific method we are all much more qualified to
make a theory about throw angle than this supposed "engineer" who makes
self righteous theories after only going through the first three steps
of the scientific method.


+100 except that he only did step one and then jumped directly to step six. As I said earlier:

A good engineer would understand that he doesn't have enough information to analyze before making rash statements and claims such as [who the hell is this, again?].

A bad engineer would jump to conclusions before he figured out what he doesn't know.

We seem to have been shown into which category pnachtwey falls. And so with it his credibility.


Posted By: debraj
Date Posted: 05/11/2010 at 2:27pm
Originally posted by dauntless dauntless wrote:



This guy has got to be just messing with us. It is just too improbable that someone is that dense. Come on, admit it. You are just messing with us, right? right???Clap Ok, ok.... you got me. It was all a joke, and I took him seriously. God I feel so stupid.I almost cussed at this guy. LOL. Dead Truly great joke. You had a few of us going for sure... myself included. He is an engineer alright... a BS engineer. You are an artist my friend.


+1

sid, mol, varghesep, pnachtwey

-------------
729-F1||Rhyzm-P(FH)|| Rasant Grip orRhyzm-P max(BH)
http://youtu.be/y9y9nE9g778" rel="nofollow - vid1
http://youtu.be/xqNy786yGOs" rel="nofollow - Vid 2


Posted By: Chopin
Date Posted: 05/11/2010 at 4:24pm
Originally posted by pnachtwey pnachtwey wrote:

I can see that few made an effort to understand how throw can be tested by dropping a ball without spin straight down on a horizontal paddle that is moving perpendicular the dropped ball.

Doesn't any body see that the paddle motion at right angle to the balls path spins the ball and the same force cause the ball to bounce back at an angle isn't perpendicular to the paddle's blade?

No one addressed the speed and control ratings either. I bet you believe in the tooth fairy too.

Some astute person did post something about trust and that was the most intelligent response so far. Trust no one about anything and that is exactly what I am doing. I want proof, I want numbers.

Read the part about throw.
http://www.megaspin.net/articles/view.asp?id=304
Why would a paddle put a ball into a net? What force would do this while looping?

 
Hope I haven't misquoted youConfused
 
I don't see how that's going to test for throw angle. I can't imagine how the low impact forces involved there would engage the sponge, which I hypothesise would affect throw angle. Consequently, I see your test (suggested in your first post and not quoted here) as more of a test for topsheet grip than throw angle. I would think you would need to redsign your test along the lines of the video shown, although I don't believe robots are accurate enough yet.
 
 
 
 
 
 


Posted By: onurzaim
Date Posted: 05/11/2010 at 4:39pm
Originally posted by pnachtwey pnachtwey wrote:

I am a relative TT rookie but I am an experience engineer and I think the talk about throw angle is BS. I would like to see some evidence that an engineer would believe that one rubber or blade throws higher or lower than another.

I think it should be obvious that a ball hits a paddle without spin and perpendicular to the paddle will bounce off perpendicular too baring any external forces. Obviously what others refer to as throw angle is really more of a reaction to spin or the angle at which the ball hits the paddle or the motion of the paddle when it hits the ball.   Spin, the motion of the paddle and the angle of incidence to the paddle ARE NOT ATTRIBUTES OF THE RUBBER OR BLADE!!!. If I put my paddles on the table and drop balls on them the balls bounce straight up. The blades or rubbers do not magically make the ball go in any direction. I can spin the ball as I drop it and the reaction will be different.

I see way too many opinions with little engineering or scientific proof.
Does anybody have an idea of how fast a ball rotates when looped?   Lets way it is 20 revs per second.   I think a better evaluation is to drop a ball vertically at 20 revs per second from 1 meter and see how far the ball travels before it hits the table or paddle again. At least then we would have a stand measure of how a blade/rubber reacts.

I know that my T05 has an extremely low "throw angle" when I play a chopper and a high "throw angle" when playing a looper. The explanation is obvious.




I totally agree with you. I have seen that better players do not have very high throw angles. Angle is related with techinque. When you hit vertical with good punch you will get nice revolutions and ball will tend to drop earlier when you do good topspin. It is all about your technical abilites and your power. I think lower throw angle shots shows the skill of the player in my opinion aswell.

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Frindship F-1
Forhand: Hurricane 3 39
Backhand: Haifu Shark III pink sponge


Posted By: despoticwalnut
Date Posted: 05/11/2010 at 4:43pm
Originally posted by pnachtwey pnachtwey wrote:

I am a relative TT rookie but I am an experience engineer and I think the talk about throw angle is BS. I would like to see some evidence that an engineer would believe that one rubber or blade throws higher or lower than another.

I think it should be obvious that a ball hits a paddle without spin and perpendicular to the paddle will bounce off perpendicular too baring any external forces. Obviously what others refer to as throw angle is really more of a reaction to spin or the angle at which the ball hits the paddle or the motion of the paddle when it hits the ball.   Spin, the motion of the paddle and the angle of incidence to the paddle ARE NOT ATTRIBUTES OF THE RUBBER OR BLADE!!!. If I put my paddles on the table and drop balls on them the balls bounce straight up. The blades or rubbers do not magically make the ball go in any direction. I can spin the ball as I drop it and the reaction will be different.

I see way too many opinions with little engineering or scientific proof.
Does anybody have an idea of how fast a ball rotates when looped?   Lets way it is 20 revs per second.   I think a better evaluation is to drop a ball vertically at 20 revs per second from 1 meter and see how far the ball travels before it hits the table or paddle again. At least then we would have a stand measure of how a blade/rubber reacts.

I know that my T05 has an extremely low "throw angle" when I play a chopper and a high "throw angle" when playing a looper. The explanation is obvious.



Troll 6/10


Posted By: jkillashark
Date Posted: 05/11/2010 at 4:52pm
Players with poor technique will often experience that they will always have a low throw angle off of their loops into the net.

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Butterfly Viscaria FL
FH: Black DHS Neo Hurricane 3 Blue Sponge National
BH: Red Butterfly Tenergy 80

Footwork and forehand is always the answer.


Posted By: ajchien
Date Posted: 05/11/2010 at 5:09pm
Throw angle, I believe, was a term coined first by "Don Iguana Labs", a table tennis equipment enthusiast group in the US in the mid to late 1990's. Although they were originally based out of Maryland, the network spread across the US. They were able to obtain samples of newer equipment from vendors, try out the equipment, and write consensus, subjective internet posted reviews on newer (at the time) table tennis equipment. "Testers" for the group ranged from 800 rated level chronic EJ's to national team players.  I'm not sure if anyone ever claimed this to be a measurable entity. Nevertheless, the concept of "throw angle" was something that the testers seemed to understand as a method of describing equipment to each other. It has seemgly been incorporated into EJ terminology opver time.


Posted By: yogi_bear
Date Posted: 05/12/2010 at 8:14am
basing on the pattern and the way he states his outrageous statements i conclude that we were SIDomized!

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Independent online TT Product reviewer of XIOM, STIGA, JOOLA, SANWEI, GEWO, AIR, ITC, APEX, YASAKA and ABROS

ITTF Level 1 Coaching Course Conductor, ITTF Level 1 Coach


Posted By: abdulmuhsee
Date Posted: 05/13/2010 at 12:44am

Wouldn't throw angle simply be another way of saying how grippy/spinny the rubber is?  Obviously, a grippier rubber will have greater reaction to spin and throw the ball all over the place, though not always 'high' or 'low'.

Pips do have a bit more science to them depending how flexible/long they are, but the way they throw the ball still depends on what you're hitting; however, if the pips are flexible, then I would imagine that regardless of the incoming spin, since the ball is usually hit at the same position from the bounce, the pips would flex and 'throw' the ball in the same general direction regardless of the spin, though still affected by it.  Perhaps even different grades of sponge would have a similar affect and alter what general upwards or downwards angle the ball tends to go while hitting from the same position and how the rubber flexes back.
 
Did that make sense?  Could this be what 'throw angle' is?


Posted By: Heimdallalso
Date Posted: 05/13/2010 at 1:06am
Originally posted by yogi_bear yogi_bear wrote:

basing on the pattern and the way he states his outrageous statements i conclude that we were SIDomized!



Angry

LOL


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NEXY Lissom st 85g
fh/ Andro Impuls Speed max
bh/ Palio Flying Dragon 1.8



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