|
|
Stiffness test for buying new blade |
Post Reply |
Author | |
slevin
Premier Member Joined: 03/15/2012 Location: USA Status: Offline Points: 3602 |
Post Options
Thanks(0)
Posted: 08/21/2014 at 3:42pm |
While buying a blade (such as a Viscaria, for example) at a store, is there a quick way to discern whether the piece you're holding is stiff or flexy?
Earlier, I thought that perhaps blade thickness (relative to others of the same type) would be an indicator. However, I've had 2 Viscaria blades simultaneously once & the thicker one played flexy where as the other one was stiff as a brick.
|
|
Trade feedback:
http://mytabletennis.net/forum/forum_posts.asp?TID=50787 |
|
Sponsored Links | |
bschap
Super Member Joined: 01/07/2013 Status: Offline Points: 394 |
Post Options
Thanks(0)
|
great question. I hope somebody has a good answer
(for tennis racquets there is a machine that bends the stick and measures the stiffness.)
|
|
yogi_bear
Forum Moderator Joined: 11/25/2004 Location: Philippines Status: Offline Points: 7219 |
Post Options
Thanks(0)
|
a very crude way to do is tap the blade head with a pen, the higher the pitch sound the stiffer the blade
|
|
Independent online TT Product reviewer of XIOM, STIGA, JOOLA, SANWEI, GEWO, AIR, ITC, APEX, YASAKA and ABROS
ITTF Level 1 Coaching Course Conductor, ITTF Level 1 Coach |
|
racquetsforsale
Gold Member Joined: 10/02/2010 Location: at the table Status: Offline Points: 1268 |
Post Options
Thanks(0)
|
Or, bring a ball with you and bounce it on the blade, while holding the blade with a very loose grip.
|
|
zeio
Premier Member Joined: 03/25/2010 Status: Offline Points: 10833 |
Post Options
Thanks(0)
|
You have to measure the weight in addition to the thickness to get a good idea of the stiffness.
|
|
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 |
|
lineup32
Gold Member Joined: 12/06/2012 Location: Calif Status: Offline Points: 1195 |
Post Options
Thanks(0)
|
if my blade is 5.875 MM and 75Grams how stiff is it with your formula? and a compact head |
|
zeio
Premier Member Joined: 03/25/2010 Status: Offline Points: 10833 |
Post Options
Thanks(0)
|
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 |
|
firetack
Silver Member Joined: 10/18/2006 Location: England Status: Offline Points: 950 |
Post Options
Thanks(0)
|
I have found that heavier weights usually plays stiffer,I think more density in a heavier blade of the same type compared to a lighter version .
To test the flex I would put the blade with the face flat on a table or Kutchen work surface with the handle out past the edge and gently move the handle up and down whilst holding the face down and you can see the play/flex this way,done side by side it can give you an idea of the bending difference between blades Edited by firetack - 08/22/2014 at 12:52am |
|
Black Balsa 3.0 fh/tenergy 05 1.9 388d ox
|
|
schen
Gold Member Joined: 03/26/2013 Location: San Diego, CA Status: Offline Points: 1244 |
Post Options
Thanks(0)
|
I've found that it's not only the pitch matters, but the sustain. The shorter sustain blades tend to be stiffer, the longer sustained blades seem to be more flexible.
|
|
frogger
Premier Member Joined: 08/03/2010 Location: United States Status: Offline Points: 3062 |
Post Options
Thanks(0)
|
Yes that is a very good way. As it will determine the stiffness it does not always determine the speed aspect of a blade of course. :) |
|
Wood Paddle
Red side Black side. |
|
kurokami
Gold Member Joined: 11/08/2012 Location: United States Status: Offline Points: 1277 |
Post Options
Thanks(0)
|
yea i see pros do it but i still can't tell. they claim the really good ones reverberate like an expensive string instrument or steel bar and also model-specific stuff like the donic senso blades, if you blow across them, the good ones can make a high pitched whistle like a reed instrument
|
|
Viscaria
H3N/T05 http://mytabletennis.net/forum/forum_posts.asp?TID=65345&KW=&title=feedback-kurokami |
|
Baal
Forum Moderator Joined: 01/21/2010 Location: unknown Status: Offline Points: 14336 |
Post Options
Thanks(0)
|
I have never found a way that works except playing with one but maybe i should try zeios method of thickness and weight. Pitch is not too helpful for viscaria at least.
|
|
SolidEvolution
Member Joined: 05/10/2014 Location: The Netherlands Status: Offline Points: 70 |
Post Options
Thanks(0)
|
Ok, it's a saturday so I've had some time to do some creative thinking. If you put a block at the base off the blade, say where there handle stops, and bounce a ball off the blade. Then move the block halfway of the blade, and bounce the ball again. The difference in bounce should give you a relative idea of the stiffness, you also get some pitch and sustain data off that setup as well. It's all a bit about how string based musical instruments work, so the result of it should have some scientific predictability to it. firetack had a similar idea, but I think if you use the handle to create the vibration you are testing the vibration of the handle in combination with the material of the blade, and not the properties of the blade part. Could be wrong, but I'd eliminate the handle from the equation as a players grip on it will greatly influence the vibration capabilities of the entire blade to begin with. |
|
Post Reply | |
Tweet
|
Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |
Forum Home | Go to the Forums | Forum Help | Disclaimer
MyTableTennis.NET is the trading name of Alex Table Tennis Ltd. |