Introducing Repeating SlingCrossbow 2.0

Discussion in 'Show off your homemades!' started by jt-1911, Mar 17, 2013.

  1. jt-1911

    jt-1911 Senior Member ProPlatinum

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    So due to the populaity of the old video i decided to make a second one in which I improve my design thanks to suggestions:<br><a href="http://www.youtube.com/watch?v=rmhnQvt0Klc&feature=youtu.be" target="_blank" rel="nofollow">http://www.youtube.com/watch?v=rmhnQvt0Klc&feature=youtu.be</a><embed pluginspage="http://www.macromedia.com/go/getflashplayer" src="http://www.youtube.com/v/rmhnQvt0Klc" width="425" height="350" type="application/x-shockwave-flash" wmode="transparent" quality="high" scale="exactfit"></embed>
     
  2. tokSick

    tokSick Senior Member

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    You got pretty good results with the old bolts too.<br>You are using 3 cams... Why don' t you point one in your direction so we can see you shooting the weapon? That would be cool.<br>Anyway, nice vid and great job my friend. <img src="http://illiweb.com/fa/i/smiles/icon_cheers.png" alt="cheers" longdesc="28"><br>PS: I didn' t forget to like <img src="http://illiweb.com/fa/i/smiles/icon_wink.gif" alt="Wink" longdesc="15">
     

  3. jt-1911

    jt-1911 Senior Member ProPlatinum

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    Thanks for the like, Since i try to be anonymous in my videos, i dont like to point a cam at me shooting the video, but i will find something in between <img src="http://illiweb.com/fa/i/smiles/icon_smile.gif" alt="Smile" longdesc="2">
     
  4. JoergS

    JoergS Administrator

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    Very good alterations, love the destruction!<br><br>The front heavy bolts will show their superior flight characteristics only at longer distances. The straight aluminum bolts will start to tumble after three meters or so, while the front heavy ones will fly straight. <br><br>Don't make them too light, you need some weight for decent inertia and momentum.
     
  5. jt-1911

    jt-1911 Senior Member ProPlatinum

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    I´m going to make another one tonight and tommo <img src="http://illiweb.com/fa/i/smiles/icon_smile.gif" alt="Smile" longdesc="2"> row which will be about twice the size and turret mounted <img src="http://illiweb.com/fa/i/smiles/icon_smile.gif" alt="Smile" longdesc="2"> I am going to use your tips to design new darts. Also do you think it would help to have some rolers of the tip of the "Bow" which lead the band ends to the front of the weapon so that i can have longer bands?
     
  6. JoergS

    JoergS Administrator

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    I have a feeling that your bands are already too long. Keep in mind you need to stretch these bands at least to factor 5 (vs. the relaxed length). Your draw is maybe 40 or 50 cm. With that short bow you use the bands shouldn't be longer than 10 cm relaxed, means that they should be under lots of pretension already. <br><br>Rollers would allow you to get rid of the wide bow, making the weapon a lot more compact. But they also chafe the bands, which will shorten the band life.<br><br>Did you look at my pencil shooter? That concept works fine.
     
  7. jt-1911

    jt-1911 Senior Member ProPlatinum

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    Ok, so the pencil shooter concept is nice, but i think due to the looks of the weapon, I will mkae myself a similar bow again, just scaled up, i will uploads pictures later. <img src="http://illiweb.com/fa/i/smiles/icon_biggrin.png" alt="Very Happy" longdesc="1">
     
  8. jt-1911

    jt-1911 Senior Member ProPlatinum

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    Tada the base plattform is done<br><br><a href="http://www.servimg.com/image_preview.php?i=12&u=18153285" class="postlink" target="_blank" rel="nofollow"><img src="http://i75.servimg.com/u/f75/18/15/32/85/foto_110.jpg" border="0" alt=""></a><br><br><a href="http://www.servimg.com/image_preview.php?i=13&u=18153285" class="postlink" target="_blank" rel="nofollow"><img src="http://i75.servimg.com/u/f75/18/15/32/85/foto_210.jpg" border="0" alt=""></a><br><br><a href="http://www.servimg.com/image_preview.php?i=14&u=18153285" class="postlink" target="_blank" rel="nofollow"><img src="http://i75.servimg.com/u/f75/18/15/32/85/foto_310.jpg" border="0" alt=""></a>
     
  9. jt-1911

    jt-1911 Senior Member ProPlatinum

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    Sorry for the bad quality but this is my webcam, anyways for those who ask, the wood is multiplex with some kind of a lack finish on it...... <img src="http://illiweb.com/fa/i/smiles/icon_smile.gif" alt="Smile" longdesc="2">
     
  10. onnod

    onnod Im from Holland, isnt that weird?

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  11. Nice, can't wait to see the vids of the second version. The first vid was awesome.
     
  12. jt-1911

    jt-1911 Senior Member ProPlatinum

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    Thanks, but its gonna take like 3 days more, because the Magazine is fidly to make. <img src="http://illiweb.com/fa/i/smiles/icon_smile.gif" alt="Smile" longdesc="2">
     
  13. FIAAO

    FIAAO Failureisalwaysanoption

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    Very nice so far! Maybe you want to put the board that holds the string further up the handle, for more draw-length?
     
  14. jt-1911

    jt-1911 Senior Member ProPlatinum

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    Well i just measured the draw length and it is 23 centimeters (Old crossbow 15 cm). Do you guys think I should move it back to increase draw length, just as a note I am gonna be using theraband blue on this. <img src="http://illiweb.com/fa/i/smiles/icon_smile.gif" alt="Smile" longdesc="2"> Cheers JT
     
  15. onnod

    onnod Im from Holland, isnt that weird?

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    i would try to make it longer, longer is better
     
  16. <table width="90%" cellspacing="1" cellpadding="0" border="0" align="center">
    <tr><td><span class="genmed"><b>onnod wrote:</b></span></td></tr>
    <tr><td class="quote">i would try to make it longer, longer is better</td></tr>
    </table>
    <span class="postbody"><br><br><br>+1</span>
     
  17. JoergS

    JoergS Administrator

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    The length of the bolt dictates the max draw on these repeaters. The string has to block the next bolt from falling into the track, so you can't go longer than the bolt length minus about 3 cm.
     
  18. jt-1911

    jt-1911 Senior Member ProPlatinum

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    Thats true joerg but, I am not at the stage where i am designing or making the magazine or the bolts, i can still change this. I think I am going to increase my draw length though. Thanks for the suggestions <img src="http://illiweb.com/fa/i/smiles/icon_smile.gif" alt="Smile" longdesc="2">
     
  19. jt-1911

    jt-1911 Senior Member ProPlatinum

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    Slowly taking its shape<br><a href="http://www.servimg.com/image_preview.php?i=18&u=18153285" class="postlink" target="_blank" rel="nofollow"><img src="http://i75.servimg.com/u/f75/18/15/32/85/slingb10.jpg" border="0" alt=""></a>
     
  20. jt-1911

    jt-1911 Senior Member ProPlatinum

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    Ohh and i increased the draw to 42 centimeters so i doubled it <img src="http://illiweb.com/fa/i/smiles/icon_smile.gif" alt="Smile" longdesc="2">