Band Lengths

Discussion in 'General Slingshot Discussions' started by Jenko022, Oct 16, 2011.

  1. Jenko022

    Jenko022 New Member

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    Hi all,<br><br>Apologies if this has been asked before on the forum.<br><br>Just wanted to know if there is a fixed band length used when using theraband? I target shoot mostly but some friends are interested in hunting and I would like to make some good hunting slingshots for them.<br><br>Is the length calculated from your own arm draw length or is there another method?<br><br>And when tapering bands is there a ratio that should be stuck to?<br><br>Thanks in advance.<br><br><br>Jenko022.<br>
     
  2. JoergS

    JoergS Administrator

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    How far do you want to draw out? <br><br>There is a huge difference in bandlength between the "anchor point" (corner of the mouth), the "half butterfly" and the "full butterfly" method. <br><br>Simply measure the distance between your shooting hand (at full draw) and the slingshot frame.<br><br>Then, divide the length through<br><br>3: loooong bandlife, but weak<br>4: good bandlife, medium strength<br>5: short bandlife, extremely powerful<br><br>Add 3 cm for the binding. <br><br>Now on to the tapering.<br><br>Use<br><br>Straight bands for loong bandlife, weak performance<br>3:2 tapering for good bandlife, medium performance<br>2:1 tapering for short bandlife, best performance<br><br>A full sheet of TB Gold has 18 kg draw (max). I recommend 6 kg draw for steel balls 12-15mm, 12 kg draw for 16-18 mm steel or 14-16mm lead, and 18 kg for even heavier balls. So figure out how much of the length of TB gold your bandset will use, then you have your draw. <br><br>I use 2,8 cm (fork) and 1,8 cm (pouch). One stripe per side = 6 kg, two stripes = 12 kg, 3 stripes = 18 kg.<br><br>Good luck<br><br>Jörg
     

  3. Jenko022

    Jenko022 New Member

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    Excellent! Thank you Jorg.<br><br>Have you ever used a mix of tube and theraband?<br><br>For example using tubing at the forks of the slingshot and attaching theraband to the tubing. I have an idea for a slingshot and I am currently working on the frame. I wanted to put a short piece of tubing at the forks then attach the TB to it. Not sure if this would be benificial for performance or not.<br><br>Sorry if my explanation isn't very clear I will post pics when ready.<br><br>All the best, thanks for replying. Is good to hear from you.<br><br><br>Jenko022.
     
  4. JoergS

    JoergS Administrator

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    A mixture might work, but why? The flat bands never tear at the fork, always at the pouch (as long as you have rounded the fork tips well enough). <br><br>Tubes will lower the performance, you will have to invest more time into making a band set, and the band life won't go up at all.
     
  5. Jenko022

    Jenko022 New Member

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    I was only going to use tubing at the forks of the slingshot and attach the bands to it. The tubes won't be used to try and add power, more to try as a different attachment method.<br><br>I do feel a huge difference using thereband compaired to tubes. I will rethink my design.<br><br>I suppose my main goal of my design is easier attachment of bands. In saying that the tubes wouldn't help me toward this goal.<br><br>Back to the drawing board <img src="http://illiweb.com/fa/i/smiles/icon_smile.gif" alt="Smile" longdesc="2"><br><br>Jenko022
     
  6. Brigl

    Brigl New Member

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    I have used this method before on a Robert's Rocket after attaching TB silver tubes to it. I cut the tubes off and left a bit on the forks and then attached a full sheet of TBG with a constrictor knot. The attachment method worked great because the tube provides more resistance on the constrictor knot than smooth steel forks.<br><br>I don't use this attachment method anymore but I would like to see pics of yours.
     
  7. Jenko022

    Jenko022 New Member

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    As soon as its ready I will post pics. Thanks for the feedback.
     
  8. Ryan Wigglesworth

    Ryan Wigglesworth Senior Member

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    I have used a loop of tube before as an attachment... It sorta seemed like unnecessary work though, and have since stopped using it.
     
  9. Cuthbert Allgood

    Cuthbert Allgood New Member

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    Attaching flat bands to the frame with over the top method is really easy to do. The first few frames i banded, i was awkward and uncomfortable doing it, but I have done about 20 now and It is really simple to do now. I have developed my method, and I don't fumble anymore. Your method of attachment sounds a lot more complicated than it needs to be. If you are not used to attaching the bands to frame, just keep practicing , it will get easier.<br>
     
  10. 3bears

    3bears New Member

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    gamekeeper John has a really good how to video on his you tube channel, he uses a bit of string which I find much easier now, id been struggling with pliers for ages.... needed an extra hand lol