Tube speed and power info

Discussion in 'General Slingshot Discussions' started by otta88sun, Jan 5, 2013.

  1. otta88sun

    otta88sun New Member

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    Hi guys,<br>after have build more than 60 bands with thera band gold/blue, i want to build some sling shot with thera band tube.<br><br>I red that tube lives more but are a bit less speedy.<br><br>I usually shoot with 3,66 4,11 and 7,06g steel ball, but i don't exlcude to shoot with heavier one a day.<br><br>Joerg did a calculator only for bands, and i have not a lot of money for do a lot of test (buy a lot of tube).<br><br>So.... <br><br>1) One tube per side is enough for shoot 15g steel ball?<br>2) How mouch speed i get with 90cm drawlenght?<br>3) Which kind of tube should i use? (silver are the more powerfull i saw)<br><br>I have no intention to taper (with loop) the tube and i prefer use only 1 tube per side coz bake the pouch easier to build.<br><br>best regards,<br>Ottavio
     
  2. zwillie

    zwillie New Member

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    Hi Ottavio,<br><br>You are always posting about speed and more speed... <img src="http://illiweb.com/fa/i/smiles/icon_biggrin.png" alt="Very Happy" longdesc="1"><br>You are shooting with tapered bands ...for speed.... <img src="http://illiweb.com/fa/i/smiles/icon_biggrin.png" alt="Very Happy" longdesc="1"><br><br>Are you shure that you will become happy with untapered tubes? <img src="http://illiweb.com/fa/i/smiles/icon_question.gif" alt="Question" longdesc="17"><br><br>Just a question you should think about before you lost money. <img src="http://illiweb.com/fa/i/smiles/icon_scratch.png" alt="scratch" longdesc="33"><br><br>I like tubes more than bands (tapered).<br>It`s a lot more work (for me) to make a tubeset than a flatband set.<br>I´m not a speedjunkie like you it`s just the clean look I like.<br><br>Think about this and then ...let`s see what tubes you need.<br><br>Sorry, this should not sound like a teacher <img src="http://illiweb.com/fa/i/smiles/icon_wink.gif" alt="Wink" longdesc="15">
     

  3. otta88sun

    otta88sun New Member

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    Hi,<br>yeah i search even more speed... i NEED FOR SPEED XD<br><br>No worry for teaching...<br><br>I reserch more speed coz more speed = more energy/more precision/ more "cool"<br><br>But, instead "teacher" could u give me some tech data for tube?<br><br>for an example, at wich speed do u shoot a 3,66/4,11/7,06g steel ball? (9,5 10 12mm)<br><br>I don't want competition with anyone but speed is one of the most important paramter for a SS.<br><br>If u tell me that with a 90cm drawlenght (half butterfly) you can shoot 12mm steel ball at 72mps or more, i will really enjoy, and i'll be curious to know which tube u did and how u build that.<br><br>XD
     
  4. CEZ

    CEZ New Member

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    I think tubes are not built for speed, you can pseudo-taper them (meaning looping at half length) but still the won't be close to a good set of flatbands (well maybe if you are Tobias and shoot them butterfly)<br>They have other pros though, they are quiet, don't turn around your pouch everytime, last long, some say they are more precise. But you will be disappointed if you are looking at their speed.
     
  5. Arturo Borquez

    Arturo Borquez Administrator

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    @otta88sun ... a speed of 250fps is very good for ss ... if you want more energy use heavier ammo and bands ... you'll fail to attempt 300+fps and if you can do it the bands won't last, ... almost nothing ... that's rubber limitations, unavoidable ...
     
  6. zwillie

    zwillie New Member

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    Okay I warned you <img src="http://illiweb.com/fa/i/smiles/icon_biggrin.png" alt="Very Happy" longdesc="1"><br><br>Here the pics of my tapered tube set.<br>It´s made of Megarubber at size ultra light.<br>It is the ultra light 4,0mm x 6,4mm with 19,6mm² ringarea.<br>Drawweights are 3,2 / 4,3 / 5,4 kg at 300% / 400% / 500% elongation.<br><img src="http://up.picr.de/13026857ld.jpg" border="0" alt=""><br><br><img src="http://up.picr.de/13026858jb.jpg" border="0" alt=""><br><br><br><br>The knots are made with a string and constrictor knot,<br>but I put small pieces of dankung 3060 over it to cover the core.<br>This makes no sense because you get more weight and less speed.<br>But I like the clean look of it.<br>I draw this out to 100cm (half butterfly)<br>It´s fast but I have no chrony.<br>I´m more a builder than a shooter.
     
  7. otta88sun

    otta88sun New Member

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    it look nice zwillie! Nice tapering too.<br>I supposed it shoot 7g ad 60mps or less so.. 12J about or less<br>nice one!<br><br>To arthuro: so if i get more drawnlenght (full butterfly) and shoot to more than 80mps they break before?
     
  8. otta88sun

    otta88sun New Member

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    <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">@otta88sun ... a speed of 250fps is very good for ss ... if you want more energy use heavier ammo and bands ... you'll fail to attempt 300+fps and if you can do it the bands won't last, ... almost nothing ... that's rubber limitations, unavoidable ...</td></tr>
    </table>
    <span class="postbody"><br><br>free latex bands can eliminate this limit?</span>
     
  9. zwillie

    zwillie New Member

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    <img src="http://illiweb.com/fa/i/smiles/icon_eek.gif" alt="Shocked" longdesc="5"> I have a drawweight of 10kg with a drawlength of 100cm and 25cm deadway.<br>The acceleration way is 75cm.<br><br>I always thought that is a lot. <img src="http://illiweb.com/fa/i/smiles/icon_cry.gif" alt="Crying or Very sad" longdesc="11"><br><br>Need some training. <img src="http://illiweb.com/fa/i/smiles/icon_rolleyes.gif" alt="Rolling Eyes" longdesc="14">
     
  10. otta88sun

    otta88sun New Member

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    is a good drawlenght however, i shoot at 72mps 12mm steel ball with 90cm drawlenght <img src="http://illiweb.com/fa/i/smiles/icon_biggrin.png" alt="Very Happy" longdesc="1"> is good is good... <img src="http://illiweb.com/fa/i/smiles/icon_biggrin.png" alt="Very Happy" longdesc="1">
     
  11. zwillie

    zwillie New Member

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    What draw weight do you have to get that speed?
     
  12. otta88sun

    otta88sun New Member

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    i have not tools to know that... what do u suggest me?
     
  13. Arturo Borquez

    Arturo Borquez Administrator

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    <table width="90%" cellspacing="1" cellpadding="0" border="0" align="center">
    <tr><td><span class="genmed"><b>otta88sun wrote:</b></span></td></tr>
    <tr><td class="quote">it look nice zwillie! Nice tapering too.<br>I supposed it shoot 7g ad 60mps or less so.. 12J about or less<br>nice one!<br><br>To arthuro: so if i get more drawnlenght (full butterfly) and shoot to more than 80mps they break before?</td></tr>
    </table>
    <span class="postbody"><br>The most important factors that wears and break the bands is ELONGATION and TAPER, the more elongated and the more taper the less the bands lasts ...<br>I've never used latex, but what I learned elsewhere is that latex maybe is 10% speedier but lasts less ...</span>
     
  14. zwillie

    zwillie New Member

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    I bought a suitcase weight.<br>Its digital and goes up to 50kg.<br>It has a memory function, so I draw out, push the button.<br>Then you can read the drawweight ( in gramms, pounds, kg) <br>I paid about 5&euro; at Aldi market.<br>I lost about 2cm of drawlength while measuring.<br>I painted my fingers in the pig to show how I hold it.<br><br><img src="http://up.picr.de/13029583rn.jpg" border="0" alt="">
     
  15. otta88sun

    otta88sun New Member

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    good price but where is aldi market? if u agree i can give u money(spedition cost too) and u send it another one for me...
     
  16. zwillie

    zwillie New Member

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    It´s the biggest discounter in Germany, but this was just a once only thing. <br><br>Here is one which looks very handy for slingshots <a href="http://www.ebay.de/itm/Digital-Kofferwaage-Handwaage-Hangewaage-Gepackwaage-Thermometer-50kg-50g-/251105372770?pt=Reiseaccessoires&hash=item3a770bea62" class="postlink" target="_blank" rel="nofollow">Link</a>
     
  17. onnod

    onnod Im from Holland, isnt that weird?

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    i use one of those fish weight meters like this <a href="http://www.leermiddelen.be/contents/media/111031.png" target="_blank" rel="nofollow">http://www.leermiddelen.be/contents/media/111031.png</a>
     
  18. Arturo Borquez

    Arturo Borquez Administrator

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    I bought one of this chinese <a href="http://articulo.mercadolibre.cl/MLC-405566596-pesa-digital-portatil-con-pantalla-lcd-balanza-portatil-_JM" class="postlink" target="_blank" rel="nofollow">SCALE</a> very cheap, about 10US$ ...
     
  19. 48Chris

    48Chris New Member

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    Hi Ottavio, I've done most of my slingshot experimentation with tubular bands with no taper. I highly recomend using thera band yellow tubing(very cheep for a large roll) , double tube on each side in butterfly. Joerg does this on his Dankung Panther review video and it looks really powerful. My experience with straight tubes suggest that the heavier the tube you use, your ability to accelerate larger projectiles goes up while overall velocity may go down. Joerg shows examples of many magnum slingshots with single theraband tubes per side. They are very powerful but as he says they are not as fast as flatbands. ...I think the real trick to fast (or relatively fast) tubular slingshots is to use more length of a thinner tube. This seems to be what Joerg does in the Panther video and Tobias and Zwillie are doing with their tapered and psuedo-tapered round bands. If you figured out the constrictor you can definitely figure out how to make the pouch attachment. I've been experimenting with eye bolts to create the the fork attachment. Buona fortuna, Chris
     
  20. otta88sun

    otta88sun New Member

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    Thank you Chris <img src="http://illiweb.com/fa/i/smiles/icon_wink.gif" alt="Wink" longdesc="15"><br>After some experiment i say that gold flat bands are easier to make, to attach, and make the pouch is easier too <img src="http://illiweb.com/fa/i/smiles/icon_biggrin.png" alt="Very Happy" longdesc="1">