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Part 3 of 3: 2.2mm vs 2.0mm TT sponge thickness - Human testing and opinions 

Preston Table Tennis Association
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Third in a three part series looking at the differences in performance between 2.2 and 2mm table tennis sponge thickness - using Giant Dragon Maxspin.
In this video league and social players test these two sponge thicknesses on the same blade and give their opinions on what they are like to use. In particular we consider speed, spin and control ratings. The results are quite surprising with a wide variety of opinion being given which leads to the question just how accurate are the speed, spin and control ratings given by manufacturers, even for the same rubber.
Other videos in this three part series are:
1. Physical properites including dome, curl, weight, top sheet, tacky test, grip test, cutting on a bubble in the top sheet and other possible quality control issues
and
2. Robot testing where we compare each sponge thickness for speed and throw height differences and identify a number of problems and factors that need to be considered when testing rubbers. We also include high speed footage of the ball making contact with the topsheet and visibly climbing up the top sheet.

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6 апр 2012

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Комментарии : 16   
@benchill2164
@benchill2164 3 года назад
this was an amazing and very scientific series. Thank you!
@thiago.assumpcao
@thiago.assumpcao 6 лет назад
I love that you guys are trying the cientific way. It is a pitty the results were only valid to that set of rubbers. The idea of the scientific method is to create general statments but it is better to leave it at that as inconclusive then try to force results. I'll give some tips on how to improve the method.
@mrmr1964
@mrmr1964 12 лет назад
Great stuff guys. Fantastic over and series. Many Thanks.
@LeonRusic
@LeonRusic Год назад
Well, great series, but would be even better if you did it again with two rubbers ONLY different in thickness, not hardness as well. I also think, that japanese and german rubbers propably have a better quality control and therefore are better suit for testing.
@MrElijahtan
@MrElijahtan 12 лет назад
Yay you start to upload more videos
@florinpasca2000
@florinpasca2000 Год назад
Just wow, very, very interesting! Thanks.
@vinayhaalgaar
@vinayhaalgaar 6 лет назад
Great job. Subscribing just for your hard work.
@kevinmacattack
@kevinmacattack 11 лет назад
Very intresting video. I agree sponge hardness the same would have been better test. It seems the thicker sponge had a higher throw trajectory or was it the hardness that created it. Thanks for a great study.
@romanflores4250
@romanflores4250 4 года назад
I am uncertain of the quality of that brand of rubbers. Ive never used them and the names are not too familiar. But i would question whether quality makes large differences. Id even think to compare atleast three of the same rubbers. I think it is absolutely necessary to ensure same hardness for the rubbers of different sponge thicknesses if you could.
@pnachtwey
@pnachtwey 12 лет назад
Also, you need to think of a rubber as having two "speeds". One normal (speed) and one tangential(spin) to the paddle. A little trig can provide the effective speed for any impact angle. An experienced player will tend to close the paddle more and will therefore be more influenced by the tangential coefficient of restitution. A flat hitter will only care about the normal coefficient of restitution. It is easy to see why there are two different opinions about the speed of the rubber.
@xXXShinXtremXXx
@xXXShinXtremXXx 5 лет назад
Wow... So the two sheets had different tackiness, sponge hardness and thickness.. Shame you didn't make sure at the beginning it was only the thickness that was different. I love your approach and method anyway! It should be repeated! A lot to be learned, thank you very much and well done.
@wilkinru
@wilkinru 8 лет назад
This is why I spend a little more money on my equipment now - the variation is too much - even between the exact same rubbers. While I could be wrong, I hope that the more expensive rubbers will have better QC and thus I won't need to change my game as much per new sheet. So there you go, consistency in many ways is more important than all of the other numbers on a rubber.
@ray8uk
@ray8uk 10 лет назад
The best thing to do is to try your friends bats and see what works for you. My story is that I got a blade that I thought was fast and stiff turned out to be controlled and soft in terms of stiffness. The backhand rubber I used was from trying my friends bat and the forehand was based on speed according to the manufacturer. It has taken me about a month and half and originally I didn't like the set up of what I had bought. I changed the forehand and backhand rubbers and yesterday at the club...
@bronsonwong9905
@bronsonwong9905 Год назад
I want to see the results of this procedure but both red and yellow are 2.0
@pnachtwey
@pnachtwey 12 лет назад
A thicker sponge may feel softer even it is made of slightly harder material. The way companies rate rubbers hardness is not very useful anyway. I can't plug a degree of hardness into a formula so that it has any meaning. Rubber hardness should be measured by pressure to compress to a certain percentage of thickness. That number can be used for calculations. It would be better to think in terms of a spring constant.
@sgangar1
@sgangar1 11 лет назад
Hey man, it really doesn't help at all. You say, "in some cases 2.0 is better in some cases 2.2 is better". That's like a general statement, "it may rain tomorrow, it may not". Sorry, but I expected a conclusive answer. So either your tests failed to determine that or you should accept that there is literally no way for a player to determine what rubber would suit them unless they try both. But then we know about this before this test. So what's new that you did?
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