Pump Gun Slingshot - first tests!

Discussion in 'General Slingshot Discussions' started by JoergS, Oct 4, 2011.

  1. JoergS

    JoergS Administrator

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    Guys, this is gonna work.<br>I completed the raw <br>weapon, minus the racking slide. Banded it up with dual TB gold. The "barrel" is a bit longer than I planned, 95 cm from lock to fork. <br><br>I "mimicked" the racking slide with my hands and fingers, it works very fine! Of course I have to clamp the weapon into the vise to do that, but a ball was cleanly loaded behind the lock and the trigger held without any issues. <br><br>I fired six rounds, and not one problem arose. <br><br>Will make the slide next. Of course, if everything works, then I have tons of cosmetics to do before this will be a looker, too - right now, functionality comes first. I will probably have to make a steel version in case this baby is reliable. <br><br><br><div style="margin:auto;text-align:center;width:100%">
    <a href="http://4.bp.blogspot.com/-XMzeEaL2t60/TotGqAINbNI/AAAAAAAAA8s/ZakL4JtyPvw/s1600/pump1.JPG" class="postlink" target="_blank" rel="nofollow"><img src="http://4.bp.blogspot.com/-XMzeEaL2t60/TotGqAINbNI/AAAAAAAAA8s/ZakL4JtyPvw/s320/pump1.JPG" border="0" alt=""></a><br><br><a href="http://4.bp.blogspot.com/-4dyuLhBCx2E/TotGrACGI-I/AAAAAAAAA8w/ftO7smFRTxY/s1600/Pump3.JPG" class="postlink" target="_blank" rel="nofollow"><img src="http://4.bp.blogspot.com/-4dyuLhBCx2E/TotGrACGI-I/AAAAAAAAA8w/ftO7smFRTxY/s320/Pump3.JPG" border="0" alt=""></a><br><br><a href="http://1.bp.blogspot.com/-vxM1_7L-_jQ/TotGr9ChRKI/AAAAAAAAA80/0wjDuPg7ru8/s1600/Pump2.JPG" class="postlink" target="_blank" rel="nofollow"><img src="http://1.bp.blogspot.com/-vxM1_7L-_jQ/TotGr9ChRKI/AAAAAAAAA80/0wjDuPg7ru8/s320/Pump2.JPG" border="0" alt=""></a>
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  2. Simon J

    Simon J New Member

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    This baby is sexy. Can't wait get my hands on one. The loading idea is superb. Hats off to you, again. Will PDF plans be available in the future?
     

  3. DesertMonitor

    DesertMonitor New Member

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    Bravo <img src="http://illiweb.com/fa/i/smiles/icon_cheers.png" alt="cheers" longdesc="28"><br><br>I second Simon's question about the PDF, and will be a bit cheeky and ask if you plan to make a "How to do" video? :geek:
     
  4. Ryan Wigglesworth

    Ryan Wigglesworth Senior Member

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    Wow... This could get slingshots outlawed lol! Band that sucker up with spear gun rubber lolz
     
  5. DukaThe

    DukaThe New Member

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    Told you this will work <img src="http://illiweb.com/fa/i/smiles/icon_wink.gif" alt="Wink" longdesc="15"> Great job
     
  6. Kyl

    Kyl New Member

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    Very exciting, can't wait to see it in action. The possibilities are so <br>exciting. Totally tacticool, picatinny rails, adjustable sights, laser <br>sight, bayonet, folding G3 stock, flashlight, double barrel, high <br>capacity removable magazines, custom camo, paint balls? Magnets, <br>springs, Teflon, aluminum AAhh! I think my heads gonna explode.
     
  7. Tobias

    Tobias New Member

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    good job Jörg! the problem from the normal slingshotrifle is the long time to load...<br>if this one work well it will be the perfekt rifle for some destruction fun!<br><br>you use leather or a metal bolt to shot the balls?<br>if it a metalbolt maybe you can weld a washer on both sides it protect the ruber <br> and gives a good introduction for the bolt...<br><br>this will be a fun thing!
     
  8. JoergS

    JoergS Administrator

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    I use paracord string (dünnes Seil) instead of the pouch. The paracord is wrapped with a bit of rubber so there is enough friction to not slip off the ball.
     
  9. 3bears

    3bears New Member

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    <table width="90%" cellspacing="1" cellpadding="0" border="0" align="center">
    <tr><td><span class="genmed"><b>JoergS wrote:</b></span></td></tr>
    <tr><td class="quote">The paracord is wrapped with a bit of rubber so there is enough friction to not slip off the ball.</td></tr>
    </table>
    <span class="postbody"><br><br>I did wonder about that, might be worth giving the rubber a little tickle with some sandpaper to give it a bit more grip?</span>
     
  10. JoergS

    JoergS Administrator

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    I came home late from work tonite (7 PM or so), but simply HAD to make a raw slide in order to test the action.<br><br>It works! Full blown pump gun feeling and everything. Shot about ten rounds without any problems. The racking action is very light, even with two bands per side. It will be easy to upgrade to three bands per side, giving the weapon serious power. <br><br>This "eats" bands right now as everything is rough and edgy, but I love it already. Next weekend, I will be returning from a biz trip late on Saturday, but hopefully I will make the necessary enhancements (rasping... filing... sanding... painting) in time for the Sunday nite video. <br><br><br>I promise you an epic slingshot.<br><br><br><div style="margin:auto;text-align:center;width:100%">
    <a href="http://1.bp.blogspot.com/-HMyywmfpDUI/Toy64o7xmYI/AAAAAAAAA88/0_H9FeTdb3s/s1600/Pump5.JPG" class="postlink" target="_blank" rel="nofollow"><img src="http://1.bp.blogspot.com/-HMyywmfpDUI/Toy64o7xmYI/AAAAAAAAA88/0_H9FeTdb3s/s320/Pump5.JPG" border="0" alt=""></a><br><br><a href="http://2.bp.blogspot.com/-IBC2_As3yH8/Toy65ri4LLI/AAAAAAAAA9A/rVqGafx9cLM/s1600/Pump4.JPG" class="postlink" target="_blank" rel="nofollow"><img src="http://2.bp.blogspot.com/-IBC2_As3yH8/Toy65ri4LLI/AAAAAAAAA9A/rVqGafx9cLM/s320/Pump4.JPG" border="0" alt=""></a>
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  11. 3bears

    3bears New Member

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    <table width="90%" cellspacing="1" cellpadding="0" border="0" align="center">
    <tr><td><span class="genmed"><b>JoergS wrote:</b></span></td></tr>
    <tr><td class="quote"> <br><br> hopefully I will make the necessary enhancements (rasping... filing... sanding... painting) in time for the Sunday nite video. <br><div style="margin:auto;text-align:center;width:100%"><a href="http://2.bp.blogspot.com/-IBC2_As3yH8/Toy65ri4LLI/AAAAAAAAA9A/rVqGafx9cLM/s1600/Pump4.JPG" class="postlink" target="_blank" rel="nofollow"><br></a></div>
    <br>
    </td></tr>
    </table>
    <span class="postbody"><br><br><br>I'll get the popcorn, <img src="http://illiweb.com/fa/i/smiles/icon_smile.gif" alt="Smile" longdesc="2"> I've been looking forward to seeing how this one turned out....</span>
     
  12. petersonOD

    petersonOD New Member

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    These just keep on getting better and better!
     
  13. Ivo

    Ivo New Member

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    Since the grip(pump) is not yet finalized...I have a suggestion....Non slip grip. <img src="http://illiweb.com/fa/i/smiles/icon_pirat.png" alt="pirat" longdesc="23"><br><br><a href="http://www.servimg.com/image_preview.php?i=536&u=14665618" class="postlink" target="_blank" rel="nofollow"><img src="http://i46.servimg.com/u/f46/14/66/56/18/pump_b10.jpg" border="0" alt=""></a><br><br>...or...<br><br><a href="http://www.servimg.com/image_preview.php?i=537&u=14665618" class="postlink" target="_blank" rel="nofollow"><img src="http://i46.servimg.com/u/f46/14/66/56/18/pump2_10.jpg" border="0" alt=""></a><br><br>Haha, messing is what I do. <img src="http://illiweb.com/fa/i/smiles/icon_lol.gif" alt="Laughing" longdesc="7"><br><br>Good Day,<br><br><font color="red"><strong>Sparta</strong></font>
     
  14. JoergS

    JoergS Administrator

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    Ivo, nice! <br><br>I have to say, though, that the best grip is high, right in line with the rubber bands. This way the slide won't cant, and you can pull with very low resitance from friction.
     
  15. Ivo

    Ivo New Member

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    True...I had no idea how you were planning on doing it, so I just sprincledsome art dust on what's already on the board...I drew up a full dragon head too, but thought it was too much <img src="http://illiweb.com/fa/i/smiles/icon_smile.gif" alt="Smile" longdesc="2"> ...come to think of it...that would allow one to add bearings to the grip. With bearings riding on top and bottom of barrel the pressure will be in the neutral plane eliminating the torque and getting things rolling smooth. <img src="http://illiweb.com/fa/i/smiles/icon_smile.gif" alt="Smile" longdesc="2"> Right on, Joerg. <img src="http://illiweb.com/fa/i/smiles/icon_pirat.png" alt="pirat" longdesc="23"><br><br>Ivo
     
  16. MrNayNay

    MrNayNay New Member

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    I think this pumpgun is really expensive.<br>How much money you want for this slingshot?<br><img src="http://illiweb.com/fa/i/smiles/icon_biggrin.png" alt="Very Happy" longdesc="1">
     
  17. tokSick

    tokSick Senior Member

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    This is my favorite one.<br>I hope( and i' m not the only one) you will put the plans or a how-to-do vid on this forum.<br>Thank you for all your work Joerg.