TB Gold Band Calculator: Online!

Discussion in 'General Slingshot Discussions' started by JoergS, Oct 29, 2011.

  1. JoergS

    JoergS Administrator

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    The Thera Band Gold band calculator is finished. <br><br>The routine works fine for me, but I need your help - can you verify? Together, we can make this the perfect tool for the world's most popular slingshot band material.<br><br><a href="http://slingshotchannel.com/band_calc.html" target="_blank" rel="nofollow">http://slingshotchannel.com/band_calc.html</a>
     
  2. Flippinout

    Flippinout New Member

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    This is a wonderful resource and I will be using it extensively. Thank you Jorg. I will most certainly post my findings here.
     

  3. Ryan Wigglesworth

    Ryan Wigglesworth Senior Member

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    Wow, I really like this! <img src="http://r28.imgfast.net/users/2815/14/20/70/smiles/2307125563.gif" border="0" alt=""><img src="http://r28.imgfast.net/users/2815/14/20/70/smiles/4053770264.gif" border="0" alt=""> thanks alot !
     
  4. JoergS

    JoergS Administrator

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    Folks,<br><br>I have updated the calculator based on some input from Tobias. <br><br>Much stronger bands for the smaller ammo now! Make sure you are not overdoing the band stretch factor, otherwise the draw is hard.
     
  5. Tobias

    Tobias New Member

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    Jörg, good to hear you made some update! i have to make a bandset exactly what me the calculator recommends, will be interesting how this shoot.<br><br>i test the calc. and see he made nearly the same bandwidth like i but not so much streching, if someone made the Bandlife to number 9 max power, he still has a longer life than my bands. <br>When he made band life to number 1 he have this bands for the rest of his life <img src="http://r28.imgfast.net/users/2815/14/20/70/smiles/2307125563.gif" border="0" alt=""><img src="http://r28.imgfast.net/users/2815/14/20/70/smiles/4053770264.gif" border="0" alt=""><img src="http://illiweb.com/fa/i/smiles/icon_cheers.png" alt="cheers" longdesc="28"><br><br>well done!
     
  6. CEZ

    CEZ New Member

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    Now I know what type of bands to use for a slingshot-present:)
     
  7. mrjoel

    mrjoel New Member

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    This thing is da bomb!<br>
     
  8. DaveSteve

    DaveSteve New Member

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    Thumbs up!!!<br><br>Thanks Joerg!!
     
  9. softgoat

    softgoat New Member

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    Perfect timing, I just got my Hand Howitzer in the mail today. I will use the calculator to cut bands for it. I'll try and post my results by tomorrow.
     
  10. onnod

    onnod Im from Holland, isnt that weird?

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  11. softgoat

    softgoat New Member

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    Made a set of bands for 12mm steel and 100cm draw length, I am really happy with the results. I can penetrate 1/4 plywood from 30 feet easily. <img src="http://illiweb.com/fa/i/smiles/icon_cheers.png" alt="cheers" longdesc="28">
     
  12. TetleyK

    TetleyK New Member

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    Some suggestions:<br><br>1) Add the draw weight to the results.<br><br>2) Reduce the output precision to 1mm.<br>I doubt that anyone can cut to an accuracy of less than 1mm. Not without a laser cutter!<br><br>3) Add a box for relative density.<br>If a value here is filled in then use it, otherwise use the material setting. I mention this because my glass marbles have a density of 2.7 or more whereas the calculator uses a figure of 2.2. Allowing the entry of other densities will allow for people to use other materials. Osmium anyone? Relative Density of 22.57!!<br><br><br>It's a great calculator!
     
  13. Tobias

    Tobias New Member

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    i think this area bring you the best bands:<br><br><a href="http://www.servimg.com/image_preview.php?i=55&u=16906761" class="postlink" target="_blank" rel="nofollow"><img src="http://i40.servimg.com/u/f40/16/90/67/61/bandre11.jpg" border="0" alt=""></a>
     
  14. LANUZZI

    LANUZZI New Member

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    I made different band sets with the calculator. For target shooting and paintballs as well and an otherstrong set for 12 mm steal and half butterfly. With a little more practice I want to upgrade to 16 mm steal and full butterfly - so I will follow Tobias recommendation. I think I would have given up shooting with different sets without that resource.<br><br>Thanks a lot Jörg - with this tool you make my work a success<br><br><br>cheers
     
  15. LANUZZI

    LANUZZI New Member

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    Question:<br><br>will it be possible to calculate the speet of a bullet based on the factors you specify the parameters for the algorythm?<br><br>I think it should get more and more exactly the more reference examples you have.<br><br>Is my asumption correct?
     
  16. Tobias

    Tobias New Member

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    this will be cool, you only need some Chrony test and a math expert.
     
  17. JoergS

    JoergS Administrator

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    Don't forget that there are many factors that can/will have an impact. <br><br>- Temperature of the environment<br>- "Aiming time" (holding the bands in stretched condition before release)<br>- Flipstyle vs. static shooting style<br>- Weight and size of the pouch<br><br>If I shoot over the Chrony, my results vary. The range is about 10 to 15%, quite severe. I shoot the same bands in the same temp and use the same style, pretty much. The true range between different shooters will most likely be like 30%. <br><br>So I think that you can get a rough estimation at best.
     
  18. LANUZZI

    LANUZZI New Member

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    OK, I did not suspect that the result will vary so significantly. My assumption was, that if I cut a bandset for example in the way tobias recommends and shoot with the same drawlength (this will be my target for 2012 - is this realistic?) I would get the same speed. However, as I write this lines I can imagine, that no one draws 155 cm anytime and 10mm longer draw will change the result even more.<br><br>Great idea in theory - but not in practice, I understand... <img src="http://illiweb.com/fa/i/smiles/icon_scratch.png" alt="scratch" longdesc="33">
     
  19. Tobias

    Tobias New Member

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    Jop, this will work! this bands make with 16mm 45Joule with every shot.<br>this bands are not so strong.<br><br>looks like i have to make a "how to shot with stong bands in butterfly vid" <img src="http://illiweb.com/fa/i/smiles/icon_biggrin.png" alt="Very Happy" longdesc="1"> this is really not so much work for me, if this help you i made it.
     
  20. LANUZZI

    LANUZZI New Member

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    BINGO!<br><br>Thanks a lot in advance Tobias. Are these the bands you "shoot over the canyon" as well? I would be very surprised, as you have a relly deep inpact after a long distance...<br><br>do you now how far the distance is?