Real tapered tubes

Discussion in 'General Slingshot Discussions' started by zwillie, Jan 27, 2013.

  1. zwillie

    zwillie New Member

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    Hi,<br>I started an experiment with tubes today.<br>You all know the pseudo tapered tubes (those with a sling which doubles the tubes)<br>I always thinking about making my own real tapered tubes.<br>Here it is, two tubes (same size) stick into each other. <img src="http://illiweb.com/fa/i/smiles/icon_cheers.png" alt="cheers" longdesc="28"><br>Works also with different tube sizes.<br><br><img src="http://up.picr.de/13266528ac.jpg" border="0" alt=""><br><br><img src="http://up.picr.de/13266550jj.jpg" border="0" alt="">
     
  2. Arturo Borquez

    Arturo Borquez Administrator

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    awesome Zwillie ... that's neat elegant ... did you lube to slip the rubber? with what?
     

  3. Tysonspapa

    Tysonspapa New Member

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    wie hast du denn den übergang so fliessend hingekriegt? das sie aus wie aus einem stück <img src="http://illiweb.com/fa/i/smiles/icon_eek.gif" alt="Shocked" longdesc="5">
     
  4. Saderath

    Saderath Senior Member

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    Now that is creative! Nice thinking!<br><br>What does the theraband do? ... just kidding <img src="http://illiweb.com/fa/i/smiles/icon_biggrin.png" alt="Very Happy" longdesc="1">
     
  5. zwillie

    zwillie New Member

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    <table width="90%" cellspacing="1" cellpadding="0" border="0" align="center">
    <tr><td><span class="genmed"><b>Tysonspapa wrote:</b></span></td></tr>
    <tr><td class="quote">wie hast du denn den übergang so fliessend hingekriegt? das sie aus wie aus einem stück <img src="http://illiweb.com/fa/i/smiles/icon_eek.gif" alt="Shocked" longdesc="5">
    </td></tr>
    </table>
    <span class="postbody"><br><br>The outer tube <strong>is</strong> one piece <img src="http://illiweb.com/fa/i/smiles/icon_lol.gif" alt="Laughing" longdesc="7"><br><br>There is a 300mm tube with a 125mm inner tube at the same size.</span>
     
  6. zwillie

    zwillie New Member

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    Here another pic.<br><img src="http://up.picr.de/13268297go.jpg" border="0" alt=""><br><br>Looks like there are three different tube sizes but its all the same 4064.<br><br>Think the tube experiments I do need to be proved with a....chrony <img src="http://illiweb.com/fa/i/smiles/herz.png" alt="I love you" longdesc="22">
     
  7. zwillie

    zwillie New Member

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    @ Arturo,<br>I bended the inner tube with cord and a constrictor knot.<br>Slip the cord throug the outer tube.<br>Then I draw on the cord to slip the inner tube (it`s getting thinner when streched) throug the outer one.<br>This is a annoying <img src="http://illiweb.com/fa/i/smiles/icon_mad.gif" alt="Mad" longdesc="8"> work.<br>Next time I will try a compressor method for the last step.<br>I don`t want to use any lubricant.
     
  8. onnod

    onnod Im from Holland, isnt that weird?

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  9. FIAAO

    FIAAO Failureisalwaysanoption

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  10. Arturo Borquez

    Arturo Borquez Administrator

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    @Zwillie ... I did that question because I was worried about using lube ... the dry method you used I believe grants no draw internal slippery ... did you stretched the tubes ?<br>Cheers<br>Arturo
     
  11. zwillie

    zwillie New Member

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    I streched the inner one, so it fits in the hole of the outer one.<br>The outer one should not be streched, the inner diameter would shrink.<br>Just "push" the outer one.
     
  12. stej

    stej New Member

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    Interesting, I wonder how it will work. I suspect that the inner tube will slide in the outside tube even when you didn't use any lube. Maybe what about securing the end with some knot?
     
  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>zwillie wrote:</b></span></td></tr>
    <tr><td class="quote">I streched the inner one, so it fits in the hole of the outer one.<br>The outer one should not be streched, the inner diameter would shrink.<br>Just "push" the outer one.</td></tr>
    </table>
    <span class="postbody"><br>No I mean did you stretch the whole tubes no for assembling ... for testing ...</span>
     
  14. tokSick

    tokSick Senior Member

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    Great idea Zwillie!<br>You said you used a cord to get the inner one in the other, ok, but i don' t get how you took the cord off of it <img src="http://illiweb.com/fa/i/smiles/icon_scratch.png" alt="scratch" longdesc="33">
     
  15. zwillie

    zwillie New Member

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    @ Arturo,<br><br>Oh yes I streched it to the maximum drawlength, no problems.<br><br>I did a marking on the outer tube and streched it, so I could see noo slipping.<br>For the second tube I used silicon spray and this inner tube slips.<br><br><br><br>@ toksick,<br><br>I draw the inner tube completely through the outer tube and so I got the bended end outside and cut it off.<br>Hehe I thought about the same when starting this tapering.
     
  16. CEZ

    CEZ New Member

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    How about pumping the external tube with air and putting in the freezer for a couple of mins so it looses its stretching ability? It should be wider for just a couple of secs when you take it out, that way you could probably slip the inner tube in easier, right?
     
  17. von_z2

    von_z2 New Member

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    <div>Try using rubbing alcohol as a lubricant. It should help, but it will evaporate and not cause slipping later. </div><div class="clear"></div><div class="signature_div">
    <br>"non impediti ratione cogitationis" <img src="http://illiweb.com/fa/i/smiles/icon_wink.gif" alt="Wink" longdesc="15">
    </div>
     
  18. tokSick

    tokSick Senior Member

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    <table width="90%" cellspacing="1" cellpadding="0" border="0" align="center">
    <tr><td><span class="genmed"><b>zwillie wrote:</b></span></td></tr>
    <tr><td class="quote">
    <br>@ toksick,<br><br>I draw the inner tube completely through the outer tube and so I got the bended end outside and cut it off.<br>Hehe I thought about the same when starting this tapering.</td></tr>
    </table>
    <span class="postbody"><br><img src="http://illiweb.com/fa/i/smiles/icon_idea.png" alt="Idea" longdesc="18"> That so simple in fact. Now i feel, you know, kind of <img src="http://illiweb.com/fa/i/smiles/icon_redface.gif" alt="Embarassed" longdesc="10"></span>
     
  19. Arturo Borquez

    Arturo Borquez Administrator

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    i am liking the tubes more and more ...
     
  20. zwillie

    zwillie New Member

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    Arturo I have to warn you.<br>The fun to draw the tubes inside each other is the same as sanding micarta. <img src="http://illiweb.com/fa/i/smiles/icon_mad.gif" alt="Mad" longdesc="8"><br><br>@ von_z2,<br>thank you the alcohol thing I have to try out <br><br>When I got my chrony I will be able to make some measurements of the speed.<br>But....<br><br><br><br>....when the cash runs out before the month does <img src="http://illiweb.com/fa/i/smiles/icon_redface.gif" alt="Embarassed" longdesc="10"><img src="http://illiweb.com/fa/i/smiles/icon_biggrin.png" alt="Very Happy" longdesc="1">