Unexpected result in speed comparison
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Topic: Unexpected result in speed comparison
Posted By: mjamja
Subject: Unexpected result in speed comparison
Date Posted: 05/17/2019 at 5:18pm
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Just glued a new sheet of Spectol Red (short pips) on my Clipper. Doing a ball bounce test the new Spectol seemed significantly faster than the Tenergy 25 on the other side. I did use rubber cement so maybe it is just glue effect. T25 sheet is about 3 months old. Mark
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Replies:
Posted By: mhnh007
Date Posted: 05/17/2019 at 5:23pm
| The PIPs are harder on SP, so on bounce test SP will appear faster. |
Posted By: mjamja
Date Posted: 05/17/2019 at 6:20pm
Good to know. The first time I put on the Spectol I must not have done the bounce thing (or my senile senior mind has no memory of it). Mark
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mhnh007 wrote:Posted By: pingpungpeng
Date Posted: 05/17/2019 at 6:52pm
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also tenergy 25 is not so fast. it's the slowest tenergy.
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Posted By: igorponger
Date Posted: 05/17/2019 at 8:35pm
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PRICEY EXPERIMENT .... Dynamic tests needed. Ball impact speed on the rubber ought to be of minimum 20 m/sec. Machine to project ball at so high speed will cost you a fortune of 200 000 USD. The speed, spin and angle of the reflected ball are measured automatically and the friction - and other properties - computed. Unfortunately, the only such device we know of is owned by its developer, Butterfly Tamasu researh group, Tokyo, Japan . Be happy/ |
Posted By: haggisv
Date Posted: 05/17/2019 at 10:51pm
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I would expect the Spectol Red to be faster than T25. For pure speed, short pimple are often faster because all your energy goes into speed and much less into spin. ------------- 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: ericd937
Date Posted: 05/17/2019 at 11:48pm
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Spectol Red in max sponge? ------------- Current Setup: TBS FH T80/BH D80 Official USATT Rating 1815 Current estimated level: 1800-1900. |
Posted By: mjamja
Date Posted: 05/17/2019 at 11:57pm
Yes, max sponge
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Posted By: mykonos96
Date Posted: 05/18/2019 at 2:08am
Spectol blue is faster
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Posted By: Lula
Date Posted: 05/18/2019 at 3:08am
| In my experience short pimples is almost always much slower than inverted. |
Posted By: zeio
Date Posted: 05/18/2019 at 3:30am
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Raw pips for attacking like Spectol and its variants are actually among the fastest rubbers you could get. Generally speaking, they have the highest COR. Typical non-inverted rubbers are closer to inverted in terms of speed. Inverted has the best balance b/w speed and spin. ------------- Viscaria FL - 91g + Neo H3 2.15 Blk - 44.5g(55.3g uncut bare) + Hexer HD 2.1 Red - 49.3g(68.5g 〃 〃) = 184.8g |
Posted By: aerial
Date Posted: 05/18/2019 at 3:10pm
| COR = ??? |
Posted By: Skyline
Date Posted: 05/18/2019 at 3:24pm
| I have to agree with Lula here, short pips are slower compared to inverted. Even the fastest short pips slow the ball down and make it dead. You will notice this when you start flat hitting hard. At first it's reallly fast and then the ball slows down significantly after it has bounced on the opponents side. |