Frictionless pimples still allowed?

 

i'll address this now that I am off work.

 

table tennis balls have a standard weight of 2.7 grams, minus .3 grams or plus .7 grams deviation allowance. There is zero need to exhert any more force than the mass/weight of the ball produces to test LP (that is how you keep repeatability) After all what the test is doing is test the sliding coefficent of friction. So what this means, 400 lbs person or 110 lbs person, the force is being exherted by the mass of the ball NOT the person.

 

Simple newtonian physics (particularly Law numero uno) dictates that an object at rest (or in motion) will tend to stay at rest (or in motion) until an external force is applied.

 

Guess what, frictionless LP provide negligible force on the ball so the outcome is that the "ball barely moves" when placed on the paddle and the paddle moved in a 2 dimensional plane. Try that with short pips and the ball does move around conciderably (from the increase in friction). Even "anti" spin rubber imparts a force on the ball and it does move (there by complying with newtons law numero uno and not defying it).

 

So there is the "objectiveness" which is based on sound physics and particulalrly two equations

 

Newtons first law of motion

Dynamic Coefficent of friction

Correct, that's why I asked Figgie the second question of how he maintained fairness.  Like I said, one umpire checking could be a 240 lb bodybuilder.  Good for LP players because he will probably apply more pressure as he rubs the ball on the pips.  On the other hand, you might have an umpire that is 90 lbs and won't apply so much.  Then the ball will slide more of course.  And you can have different umpires in between with varying pressures.  So that's why I asked.



The USATT never devised a legal "friction" test of any kind for their umpires to perform on any rubber surface.  I don't know why any umpire would invent his/her own test.

 

Friction of a long pips rubber is determined by friction of the pip tops and friction of the pip necks as they also come into play when playing as pips bend when a ball strikes the pips (especially soft pips). I know for a FACT that more pressure than just the weight of the ball is applied to test pips.. The proof of that is that HALLMARK Super Defence passed the ITTF friction test.. If you have never had a sheet of HALLMARK Super Defence in your hands, you won't know that it's tops acted completely frictionless and you would not feel any resistence on the ball if you would slide a ball over the pips. However, this rubber has very soft, easily bending pips and under little pressure, the grippy necks would come in to play. That caused the rubber to pass the ITTF test.. If the test would not have been done under pressure, there is no way that the Super Defence would've passed the test. Even though the rubber was discontinued by HALLMARK, the fact remained that it did pass the friction test. So, the friction test must have happened under pressure, higher than the balls weight. Don't forget that when blocking  hard shots (which pips are mostly used for), the pips will bend and the necks come into play...

 

You gave away a NSX?? Wow, I'd like a brother in-law like that!! The only car that I ever gave away was my '92 Vette which I gave to my wife.. She used it as a daily driver and later we traded it for a 2001 Audi A4.. The nicest car that I've ever had was a 1991 Ferrari Testarossa with 33k original miles.. Only had that car for about a year and sold it before it needed any service.. Too expensive maintenance on those cars..

 

Here are pics of the TR: (after I installed some Ferrari 360 wheels)

 

 

 

I saw that, and funny thing I am not on the list either but I am a club umpire.....

 

oh well.

As a long pips player, the only thing that I'm asking (as also many other long pips players) is that our rackets are objectively tested and if they fail a objective test, I doubt that anybody would disagree with a disqualification in that case. As long pips player I'm used to opponents complaining about my equipment and the same thing happens to almost all long pips players..  Many players hate playing against us and try to blame it on our equipment..