New Thera Band Gold: Better or Worse?

Discussion in 'General Slingshot Discussions' started by JoergS, Nov 22, 2012.

  1. JoergS

    JoergS Administrator

    5,803
    106
    63
    The new formula Thera Band Gold arrived today.<br><br>It can be recognized easily, as it is 12,4 cm wide rather than the previous 13,8 cm.<br><br>I tested it immediately (but not with the chrony as it is dark already). <br><br>The new type is also thinner (0,67mm vs. the old 0,89mm). But the new type clearly is more dense, with 0,958 g/cm<sup>3</sup> vs. 0,828 g/cm<sup>3</sup> of the old type.<br><br>I then tested the draw weights. <br><br>Interesting: The new type can be stretched to factor 7 (600%), the old one ends at 6,5 (550%). <br><br>The average draw weight of the new type compared to the old is 74%.<br><br><br><div style="margin:auto;text-align:center;width:100%">
    <img src="http://4.bp.blogspot.com/-0dd4Ai0VG1w/UK6RcY1bBmI/AAAAAAAACV0/73730LeUVjY/s400/Diagramm%20Old%20New.JPG" border="0" alt=""><br><br><br><br><a href="http://2.bp.blogspot.com/-hrWkw7pTTk0/UK6RdOqVDzI/AAAAAAAACV4/GKmAdvNJNPc/s1600/TheraChart.JPG" class="postlink" target="_blank" rel="nofollow"><img src="http://2.bp.blogspot.com/-hrWkw7pTTk0/UK6RdOqVDzI/AAAAAAAACV4/GKmAdvNJNPc/s400/TheraChart.JPG" border="0" alt=""></a>
    </div>What does this mean?<br><br>Well, it is quite clear.<br><br>A <strong>new formula</strong> has been used, simply because the <strong>density</strong> of the new rubber is <strong>16% higher</strong>. Also you can see that it <strong>stretches 8% more</strong>.<br><br>The new rubber is less wide and less thick, so you have to use wider rubber strips to achieve the same draw weight. Use the factor 1,35 for cutting the new bands. So if you used to cut 3cm (fork) x 2 cm (pouch), now you should cut 4 cm x 2,7 cm. <br><br>Is it more powerful? It should, just by looking at the data. More dense, longer max. elongation. But the chrony will speak the truth.
     
  2. tokSick

    tokSick Senior Member

    3,951
    1
    0
    Hi Joerg,<br>If i do understand, with the differance of thickness,density, elongation,etc.. you will have to change your bands calculator or add a new one. I don' t use TB but i was planning to buy some. Anyway it will be the old version, so it wont change anything in my case.<br>Thanks.
     

  3. Jan84

    Jan84 New Member

    267
    0
    0
    i use the new formula TB since a few months and i had no idea that it is thinner... <br><br>thanks for this info! <img src="http://illiweb.com/fa/i/smiles/icon_smile.gif" alt="Smile" longdesc="2">
     
  4. Arturo Borquez

    Arturo Borquez Administrator

    3,609
    0
    0
    I believe that the new TBG even could be worse than old one, more dense and less draw weight, despite that improved length ... waiting the crony tests ...
     
  5. DaveSteve

    DaveSteve New Member

    218
    0
    0
    Better or worse? I'm curious about Joerg's findings.<br><br>The thing with Thera Band is that they don''t have slingshots on their mind when they produce it. <br><br>We'll see if it still works ok for our purpose.
     
  6. JoergS

    JoergS Administrator

    5,803
    106
    63
    <table width="90%" cellspacing="1" cellpadding="0" border="0" align="center">
    <tr><td><span class="genmed"><b>Arturo Borquez wrote:</b></span></td></tr>
    <tr><td class="quote"> more dense and less draw weight, despite that improved length ...</td></tr>
    </table>
    <span class="postbody"><br><br>You misinterprete the data. <br><br>The draw weight per gramm of rubber is almost the same. But the new type achieves it with thinner bands. Usually the more dense the rubber is, the better it works.<br><br>@tokSick:<br></span><table width="90%" cellspacing="1" cellpadding="0" border="0" align="center">
    <tr><td><span class="genmed"><b>Quote:</b></span></td></tr>
    <tr><td class="quote">you will have to change your bands calculator or add a new one</td></tr>
    </table>
    <span class="postbody"><br><br>I may simply add a selector for "old (13,8cm width)" and "new (12,4cm width)".</span>
     
  7. ahlver jonsson

    ahlver jonsson New Member

    58
    0
    0
    hey joerg, is it the end of your giant roll ? <br>i've bought new type without knowing it.<br>but i've bought tube and it was the old type <img src="http://illiweb.com/fa/i/smiles/icon_biggrin.png" alt="Very Happy" longdesc="1">
     
  8. FIAAO

    FIAAO Failureisalwaysanoption

    3,648
    19
    38
    Sounds interesting...
     
  9. JoergS

    JoergS Administrator

    5,803
    106
    63
    <table width="90%" cellspacing="1" cellpadding="0" border="0" align="center">
    <tr><td><span class="genmed"><b>ahlver jonsson wrote:</b></span></td></tr>
    <tr><td class="quote">hey joerg, is it the end of your giant roll ? </td></tr>
    </table>
    <span class="postbody"><br><br>No, there's still some left. But not very much.</span>
     
  10. Saderath

    Saderath Senior Member

    906
    0
    0
    when i bought my TBG roll it was 12,4 cm wide. I didn't realize it was the new type and Ive been cutting 18mm tapered to 14 mm to get 6 strips (for economical reasons).
     
  11. meeeee!

    meeeee! New Member

    131
    0
    0
    just ordered some theraband, wonder if i will get the new stuff.
     
  12. pasquale

    pasquale Member

    282
    23
    18
    I ordered a month ago some theraband from kugelwinnie do you think it is the new Theraband.
     
  13. zwillie

    zwillie New Member

    865
    1
    0
    <table width="90%" cellspacing="1" cellpadding="0" border="0" align="center">
    <tr><td><span class="genmed"><b>pasquale wrote:</b></span></td></tr>
    <tr><td class="quote">I ordered a month ago some theraband from kugelwinnie do you think it is the new Theraband.</td></tr>
    </table>
    <span class="postbody"><br><br>So did I and he send me the 124mm, seems to be the new one.</span>
     
  14. onnod

    onnod Im from Holland, isnt that weird?

    6,001
    18
    38
    Just wondering, would the highter density mean mean that less heat is lost in the same amounth of time?
     
  15. zwillie

    zwillie New Member

    865
    1
    0
    Hmm??<br>Same energy in less material would mean that there is more temperature differenz (delta T).
     
  16. JoergS

    JoergS Administrator

    5,803
    106
    63
    There isn't less material. The material is simply more dense, therefore the same mass takes less volume. Less volume means less surface. Less surface means less contact with the environment and therefore less cooling. <br><br>But the difference is minor and very likely unnoticeable.
     
  17. zwillie

    zwillie New Member

    865
    1
    0
    Hi Jörg,<br>yes you`re right.<br>I forgott the dense.<br>I thought the advantage of the new material would be that there is less mass, so that there would be more energy for the ammo.<br><br>The thing that with less surface there is less cooling sounds right.<br>Zwillie
     
  18. JoergS

    JoergS Administrator

    5,803
    106
    63
    OK, here is some Chrony result. <br><br>6 degrees Celsius, so no records are to be expected.<br><br>12 kg draw weight on both bands, <br><br>2,8 x 1,8 x 23 cm two bands per side old TBG<br>3,8 x 2,4 x 23 cm two bands per side new TBG<br><br>15 mm steel: <br><br>old TBG 64-68 m/s<br>new TBG 67-71 m/s<br><br>16 mm lead:<br><br>old TBG 54 - 57 m/s<br>new TBG 56 - 59 m/s<br><br>Conclusion:<br><br>The new TBG is slightly better than the old type (yipeee).<br><br>But of course you have to cut wider stripes (or use more layers) to get to the same draw weight.
     
  19. zwillie

    zwillie New Member

    865
    1
    0
    Und schon hab ich wieder Pippi in den Augen. <img src="http://illiweb.com/fa/i/smiles/icon_sad.gif" alt="Sad" longdesc="3"><br>Dass ich das noch erleben darf.<br><strong><br>Etwas Gutes wird durch was Besseres ersetzt!!</strong><br><br>Sonst wird doch immer alles schlechter.<br>Zwillie<br><br>PS Danke Jörg auf dich ist eben Verlaß.
     
  20. DaveSteve

    DaveSteve New Member

    218
    0
    0
    Yes, the new TBG seems to be slightly better than the old.<br><br>But I like the old ones better because I don't like the fact that I have to cut the new ones wider to get the same draw weight.