Updated Pump Action Hex Nut Shooter - Field Test

Discussion in 'Show off your homemades!' started by krayvis, Jun 12, 2013.

  1. krayvis

    krayvis Slingshot Noob

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    <iframe src="http://www.youtube.com/embed/YaIQIArsK9Y" allowfullscreen="" frameborder="0" height="315" width="560"></iframe>

    Hello all, I finally got around to making a more detailed video talking about the specifics of my slingshot, with some footage of its performance. New features added since last time:

    • raised rear sight
    • increased rubber (at the end of the video)
    • Wax on the paracord and guides to reduce abrasion (Although from visual inspection, I think the friction was actually causing the paracord to melt slightly. Anyone have any experience with this?)
    And FYI, the mess of rubber bands on the right side of the slingshot are there to prevent the nuts from falling out due to vibration. I could have used a dab of thread-locker, but didn't have any on hand.

    New muzzle velocity is between 150 and 200 feet per second.
     

    Attached Files:

  2. Great and nice work!

    Great Video!


    Joe
     

  3. FIAAO

    FIAAO Failureisalwaysanoption

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    Excellent :)

    Nice vid!
     
  4. Wanimator

    Wanimator Banned

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    I love it. Awesome video.
     
  5. sureshot_slingshot

    sureshot_slingshot Sureshot

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    very cool.....hope you get all of the kinks worked out :)
     
  6. Thistle

    Thistle RESIGNED

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    Omigosh, Krayvis! I'm staggered. Extremely impressive what you've done with the big guy's design. Splendid modifications! Reversing the position of the magazine, slide lever combo, adjustable 'iron-wood' sights… Fantastic stuff. Great job on your video too! All class. All the way. Woo-hoo!

    Laughing… "A jolly German fellow" -- Jörg is really gonna love that one. Actually, he is sort-of like a super cool Santa Clause [​IMG] isn't he? All those fun toys he designs.

    BTW, we don't have any of those crazy NJ laws in AZ. You can pretty much carry whatever you want -- except a bazooka.
    [​IMG]
     
  7. Will

    Will Thread Hijacker

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    This is excellent craftsmanship. I love seeing a concept being transformed into a perfectly functional, and very well-styled weapon!
    Great job, excited to see future projects!
    Oh, and your video was very well done, as well!
     
  8. Slagskimmer Mike

    Slagskimmer Mike thinks TBG smells better than roses

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    You and your crew make very nice videos.

    That glass bottle explosion was excellent and the "close your mouth" had me laughing.

    Great work all around.
     
  9. krayvis

    krayvis Slingshot Noob

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    Thanks for the kind words, guys. The amount of support and talent in this community is a huge motivation for me. I've got a couple more rubber-powered contraptions I want to bring to life before the end of the summer.

    I'll keep trying to improve the quality of what I put out, and I hope you'll enjoy the results. I know I'll be giggling like a child if even half of my ideas work out...
     
  10. tokSick

    tokSick Senior Member

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    Fantastic job on that weapon and very nice vid too. Love the destruction part, thanks mate.
     
  11. Courier

    Courier Senior Member

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    I really like your videos, because they are very well made.
    We all very appreciate your awesome work!
    Keep it up, please! :)
     
  12. krayvis

    krayvis Slingshot Noob

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    Thanks guys :)

    Here's a few pics of what happens after prolonged use. It would appear that a wood edge sanded down with 220 grit sandpaper still has enough friction to wear down paracord. This is the first piece of paracord I used, before replacing it with a new one. I have since applied a little bit of wax to the cord and wood parts. This not only reduces friction, but because melting is a phase transition it soaks up a lot of heat as well if I'm not mistaken.
    The new paracord has survived a dozen and a half shots under even greater tension relatively well.

    I'm wondering if a a quick coat of epoxy or super glue on the wood, then sanded down, might provide a plastic-like finish that's smoother than wood...
     

    Attached Files:

  13. FIAAO

    FIAAO Failureisalwaysanoption

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    I usually put a little tape, duct tape or electrical tape, on the parts of the string that has contact with the wood. it lasts a long time and then you just have to change the tape when it gets rough. Lasts a long time, tough :)
     
  14. CJC

    CJC BIG ELK HUNTER

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    Nice video/test
     
  15. krayvis

    krayvis Slingshot Noob

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    Failure, thanks for the tip. I'll give it a shot in the future. :)
     
  16. tokSick

    tokSick Senior Member

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    Hi Krayvis,
    I would put some metal pieces where the paracord come in contact when sliding and, instead of paracord, i' ll use iron cable from a bicycle brake. It will last longer for sure but i don' t really know if it is "compatible"... Just an idea ;)
     
  17. JoergS

    JoergS Administrator

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    I always sand those parts that come into contact with the paracord with 80 grit, then oil it with linseed, go 400 and 1200 grit, then oil it again.

    The sear and the sled are the most important parts to be polished.
     
  18. Stringsling

    Stringsling New Member

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    So fierce.... I definitely love it!

    I think you could simple use felt ( not sure of the word, so I add an image ) :
    [​IMG]

    it' just a simple part of condensed fibers, you can cut it to fit your wooden part and glue it so the paracord will not be sawed by the edge of the wood
    It's quite resistant, and really cheap. Plus, I think it'll be discreet on your design
    It's 2mm thick, so I think it'll be enough to protect your paracord from friction
    [​IMG]
     

  19. I dont think that it will really works for a longer Time!

    Make it so as Jörg wrote!

    Jörg has enough experience!

    Joe