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10 Hours Ago

brokenball replied to a thread Frustrated & Confused in General Discussion On Table Tennis

Your coach is wrong. Where is his proof? Do you just repeat anything that someone says? Spin is only reduced a about 6% based on the ratio of...

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69 replies | 6011 view(s)
1 Day Ago

brokenball replied to a thread Coach Yoo teaching Korean Auntie to deal with OX LP BH in General Discussion On Table Tennis

You can see she is aware of how the long pips return the ball. Notice she is opening the paddle a little when the ball has backspin and the next...

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3 replies | 306 view(s)
1 Day Ago

brokenball replied to a thread Is it necessary to glue the blade and rubber? in General Discussion On Table Tennis

When I put together a paddle for someone else that I know will not change the rubbers, I put two coats on the blade and on the rubber. I wait for...

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26 replies | 979 view(s)
5 Days Ago

brokenball replied to a thread Do you really want to learn something? in General Discussion On Table Tennis

I haven't resolved the problem with the simulations yet but it is clear to me the problem is with the coefficient of drag, Cd, and the Magnus...

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19 replies | 1081 view(s)
1 Week Ago

brokenball replied to a thread Do you really want to learn something? in General Discussion On Table Tennis

I found a problem. I have an initial ball speed of 40m/s which is too high. The higher ball speeds are about 30m/s. I posted this problem on...

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19 replies | 1081 view(s)
1 Week Ago

brokenball replied to a thread Do you really want to learn something? in General Discussion On Table Tennis

You better not be right! However, I don't have a better explanation for now. Physics documentation uses ω as the symbol for rotation in radians per...

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19 replies | 1081 view(s)
1 Week Ago

brokenball replied to a thread How do you choose hardness within the same rubber? in General Discussion On Table Tennis

What I have found is, TRUST NO ONE. Not the players, not the physicist. Not all physicist are good. The same goes for engineers. Not all are...

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9 replies | 786 view(s)
1 Week Ago

brokenball replied to a thread Do you really want to learn something? in General Discussion On Table Tennis

You guys should know by now I am a geek, nerd and skeptic. Just because I post this doesn't mean it is right. Math looks right but it doesn't seem...

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19 replies | 1081 view(s)
1 Week Ago

brokenball replied to a thread How do you choose hardness within the same rubber? in General Discussion On Table Tennis

There is no equation for speed as a function of hardness. Only elasticity matters when it comes to COR. Stop believing all the crap on TT forums....

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9 replies | 786 view(s)
1 Week Ago

brokenball replied to a thread Do you really want to learn something? in General Discussion On Table Tennis

Yes! Engineers/physicist can't agree on the correct formula for the Magnus effect. I have found two sources that are almost the same except for a...

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19 replies | 1081 view(s)
1 Week Ago

brokenball started a thread Do you really want to learn something? in General Discussion On Table Tennis

I have simulations of TT ball trajectories. I started the simulation over 10 years ago. I haven't done much with they lately but since I am now...

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19 replies | 1081 view(s)
1 Week Ago

brokenball replied to a thread Grip vs Spin: is there a difference? in General Discussion On Table Tennis

This made me laugh.

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72 replies | 4269 view(s)
1 Week Ago

brokenball replied to a thread Grip vs Spin: is there a difference? in General Discussion On Table Tennis

NO! It depends on the material involved. https://www.engineersedge.com/coeffients_of_friction.htm Do you see area in these equations? Do you see...

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72 replies | 4269 view(s)
2 Weeks Ago

brokenball replied to a thread Grip vs Spin: is there a difference? in General Discussion On Table Tennis

What do you really get from boosting? Much depends on how you play. If you play close to the table then speed is not as important as spin to point....

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72 replies | 4269 view(s)
2 Weeks Ago

brokenball replied to a thread Grip vs Spin: is there a difference? in General Discussion On Table Tennis

I like 802-40. I gave a sheet to one of my practice partners and he likes it a lot. 802-40 can generate a lot of spin but it doesn't do as well at...

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72 replies | 4269 view(s)
2 Weeks Ago

brokenball replied to a thread Grip vs Spin: is there a difference? in General Discussion On Table Tennis

That is a generalization. Also, physic professors are academics that don't get much real world experience. There were some on the mytt forum that...

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72 replies | 4269 view(s)
2 Weeks Ago

brokenball replied to a thread Grip vs Spin: is there a difference? in General Discussion On Table Tennis

I am civil. I haven't called you any names or USDC would jump all over me. I am talking physics. This is an example of what I am talking...

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72 replies | 4269 view(s)
2 Weeks Ago

brokenball replied to a thread Grip vs Spin: is there a difference? in General Discussion On Table Tennis

You made a comment that "softer rubbers generate way less spin" Where is your proof!? You are just repeating something some other clueless person...

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72 replies | 4269 view(s)
2 Weeks Ago

brokenball replied to a thread Grip vs Spin: is there a difference? in General Discussion On Table Tennis

Yes they would. In the end there is only the normal and tangential coefficient of restitution. All this other stuff is just confusion to keep the...

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72 replies | 4269 view(s)
2 Weeks Ago

brokenball replied to a thread Grip vs Spin: is there a difference? in General Discussion On Table Tennis

Where is your proof? You are just repeating BS you have heard from other players. BTW, my Rakza 7 Max soft is very spinny with the right strokes. ...

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72 replies | 4269 view(s)
2 Weeks Ago

brokenball replied to a thread Grip vs Spin: is there a difference? in General Discussion On Table Tennis

Again, define grippy. Is soft rubber spinnier or is it just more "grippy" So why are the TT manufacturers pushing the latest fad which is hard...

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72 replies | 4269 view(s)
2 Weeks Ago

brokenball replied to a thread Grip vs Spin: is there a difference? in General Discussion On Table Tennis

So there is nothing in between "catching" or "slipping"?

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72 replies | 4269 view(s)
2 Weeks Ago

brokenball replied to a thread Generating spin on serves in General Discussion On Table Tennis

If you think about the physics of what you are trying to achieve the it is easier to zoom in on what is necessary to achieve the desired results. ...

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48 replies | 3807 view(s)
2 Weeks Ago

brokenball replied to a thread Grip vs Spin: is there a difference? in General Discussion On Table Tennis

What about rolling friction? With or without sliding? Rolling implies that the balls are moving across the face of the paddle. I have high speed...

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72 replies | 4269 view(s)
3 Weeks Ago

brokenball replied to a thread Grip vs Spin: is there a difference? in General Discussion On Table Tennis

Obviously Yasaka is comparing apples and oranges. If Yasaka meant friction, then why didn't they say so? So how does the friction on one rubber...

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72 replies | 4269 view(s)
3 Weeks Ago

brokenball replied to a thread Grip vs Spin: is there a difference? in General Discussion On Table Tennis

The Yasaka claim is bogus and trying to take advantage of people that don't know any better. As an engineer I would as what are the units? Spin is...

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72 replies | 4269 view(s)
3 Weeks Ago

brokenball replied to a thread Academic style TT education in General Discussion On Table Tennis

There are some good points made but they are stating the obvious. The dangerous vs safe shot concept and anticipation or getting ready for a...

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19 replies | 4409 view(s)
3 Weeks Ago

brokenball replied to a thread Generating spin on serves in General Discussion On Table Tennis

When playing for points, do not do the same serve twice in a row. Being able to vary the speed and most importantly, spin keeps the opponent...

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48 replies | 3807 view(s)
3 Weeks Ago

brokenball replied to a thread TTD blade chart? in General Discussion On Table Tennis

Grow up. Equipment and boosting will not solve your problem. While I know there are blades that are too fast and too slow, because I have played...

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7 replies | 1100 view(s)
4 Weeks Ago

brokenball replied to a thread Penhold rubbers in General Discussion On Table Tennis

So much garbage posted here. What is pen hold rubber? Is there "shake hands" rubber? Does anybody have any data to back up what they say? What is...

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22 replies | 1991 view(s)

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brokenball Elite TTD Member

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About brokenball

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Click here to browse all media uploaded by brokenball

brokenball
Elite TTD Member