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You must be living near me, because I know this teacher. :LOL: But in seriousness, you should ask someone you trust for a recommendation, or just go and see. But it has no sense to be sceptic towards someone while they are teaching you, because the scepticism itself will make you less open to...

Well Blahness, I'm sure there are a lot more people who find your threads helpful, considering 80% of readers here aren't even registered. I certainly do. You describe ways of generating or mitigating spin not only by the contact point or direction of stroke, but both. It's due in large part...

@zeio , Thank you for your insight. Your post got me thinking what the goal I had in mind really was. And that is a more intuitive, accessible way to present and compare rubbers than exists now. So here are my latest musings. There are two 'systems' currently popular: Rating rubbers on 3...

I'm curious what the speeds are. I took Otcharov's record attempt, where he reaches 113 kph ball speed at full power: Screenshots below are from at 2:15. Frame 1 Frame 2 Frame 3 2 frames at 50 fps means this swing took 1/25th of a second, or 0.04s. (I double checked that there are...

Thanks, that looks great. Going to try that next practice

I'm not sure if I understand motion described here. When you hit the ball slightly on the underside, do you mean to then it in a forward motion, so something halfway between a flat hit and a push? (A push-drive).

Igorponger, you are misquoting the paper and both "rules" you made are not to be found in there. Tiefenbacher absolutely does not say anywhere there that a 1.7mm sponge gives the same Tpar (Tangential efficiency, or in laymens terms: spin and loop ability) as a 2.2mm rubber. What he says is...

Thanks for your comments. It's been a while since I've used a reybolds number if I was familiar with Stokes law, I've certainly forgot. But its very inteesting. I was quick to dismiss air resitance, as it isn't strickly part of to the collison of ball and paddle. But it becomes relevant when...

Hi Brokenball, Thanks for that paper! Super fascinating, I read it all in one go instead of going to sleep. Maybe this sounds sarcastic, but it isn't. This is a long reply so I'm going to be a bit more structured and use headers and stuff. Interesting things in the Tiefenbacher paper First...

Jedi powers are for sale on TT11, but I've adjusted the graph for those without. Made the differences smaller, and gave them equal top speed. Further changes in labels and axis'. Added illustratory examples of the type of rubber described.

Thanks for sharing, that's incredibly cool! The force curve (black line) does look like non-linear spring behavior (as you said F(x)=K*Δx^1.1). Seems to me that this behavior, coupled with a damping factor (spring-damper system) would describe tabletennis rubber great. If I understand correctly...

You are right about the units being inconsistent. I shouldn't have included units in the first place anyways. The better x-axis description is "left = small impact, right = large impact". However, having a rubber with twice the ball speed at a the same impact seems very possible, I don't know...

Alright. Let's try again. Firstly, I made clear that there's no underlying data, right under the title. I removed medium, as soft and hard give enough info, being the extremes. I added Tacky (purple), using my limited Rakza Z EH experience and NextLevels post. In general terms, it is slower on...

Hi all. Thanks for responding, even if you aren't a fan of the graph. I have learnt so much from reading your posts on this forum, going back years. The goal of this graph is not to provide a factual representation, I hope I make that clear. Perhaps I shouldn't have added H3 old by name, that...

Thanks for your feedback. That makes sense, hard rubbers don't get activated until a certain point. I added an exponential curve for the old H3, close to your values. I lowered the top speed of all other rubbers so that the max speed of old H3 is slightly above Linear Hard (New H3). Image...

Edit: 2-4-'24: adding the latest graph here so that this is the thumbnail instead of the ERT pic below. For the latest graphs, see the latest posts. Hi all, as a beginner I'm trying to make sense of the different rubber types. ESN rubbers are non-linear, Chinese rubbers are typically more...

Take a look a Nike Lunar Gato futsal (indoor football) shoes. I have wide feet and this is one of the few that comfortably fit me. Specifically the Lunar gato soles are light, cushiony but very stable and grippy. Really comfy soft leather upper shoe too.

The typical Chinese rubbers (H3) are linear, so they are more predictable than a tensor rubber like Rakza Z. What's difficult about H3 is playing with of spin and power, you have to work for it with great technique. But if your technique isn't great, and your goal is firstly to get balls on the...

I have both the Yasaka Sweden Classic and the Donic Appelgren Allplay with Yinhe/Galaxy Mercury 2 on both sides. I'm a beginner but if you're debating between these two, these are the differences I've noticed: The Appelgren vibrates with a harder, more distinct click. The Sweden Classic has a...