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    Sneak preview: Forearm mounted crossbow

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    JoergS
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    Post by JoergS on Sun Apr 22, 2012 1:46 pm

    In about two weeks, German TV will come visiting. They want to include me in a show "People with crazy hobbies". Great coverage!

    Of course they want something special that I haven't shown in an earlier video. So I pulled out my list of potential projects and settled for the concealable forearm mounted crossbow.

    Of course I used rubber as the propellant, simply because a normal prod would be way to wide, never concealable. But of course the length of a forearm mounted weapon is short, I needed a draw increase so that the full power stroke is active. So rollers, again.

    10 cm of rubber is stretched to the total span of 52 cm! Nice.

    I wanted to make this mostly from wood. I even made a spring from plywood, so the bolt is held in place! Works like a charm. There is so little metal in the piece that I believe metal detectors would have a hard time finding it.

    I wanted to be able to reload without dismounting the weapon, so I came up with a "fork". This little tool makes reloading quick and easy.

    The trigger part is simply a length of paracord that runs underneath the string. If you pull on a knot by flipping your hand down, it shoots! Simple and effective.

    I haven't started on the "beauty" task, and also I haven't maxed out the rubber. But it is really really fun to shoot with it, and it is fully concealable under my loose fitting coat.

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    Last edited by JoergS on Sun Apr 22, 2012 10:07 pm; edited 1 time in total
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    Post by Gnome on Sun Apr 22, 2012 4:58 pm

    You never dissapoint, Jeorg, that's a little slice of awesomeness. Love the fork, too, I'm thinking that might work well for a little pistol crossbow I'm working on. And of course you could shoot a critter, then eat it with the fork!
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    Post by Basilisk120 on Sun Apr 22, 2012 11:02 pm

    Once again Jeorge you have really raised the bar on cool projects. I like it.



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    Post by Ivo on Wed Apr 25, 2012 5:11 am

    Arm mounted weaponry...music to my ears! Very Happy Very Happy Very Happy

    Good stuff Joerg! We've seen a spring version, but with rubber it's double the energy storage since it's all put to work, while with a spring you only get a half. I like that.

    I hate the fork though, but please don't take it personally...I have been thinking about arm mounted bows and have a few ideas on spanning them. I'll need a minute to draw them out, so I'll stop by a little later once I get some sleep, but now I'd just like to congratulate you on another shooter complete and to wish you good luck with the Crazy Hobby guys. Looking forward to seeing the clip if you can get it up online. Very Happy

    Ivo



    Sneak preview: Forearm mounted crossbow Untitled
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    Post by JoergS on Wed Apr 25, 2012 10:36 pm

    I have worked some on the weapon. Enhanced the wooden arrow clasp. Did a small paint job as well. And I replaced the ugly straps with nice leather.

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    Post by stoneagebowyer on Thu Apr 26, 2012 4:27 am

    Always cool, always delightful, Joerg. This is for a Mad Max universe without piles of rusting scrap metal laying about in the Outback. A Mohawk haircut would be ideal, but not required. Smile

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    Post by JoergS on Thu Apr 26, 2012 4:32 am

    I have already bought a Mohawk wig, for the video!
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    Post by stoneagebowyer on Thu Apr 26, 2012 4:36 am

    Twisted minds think alike! I and I bet others will want to see the show when it is eventually done.

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    Post by mac on Thu Apr 26, 2012 8:38 am

    JoergS wrote:I have already bought a Mohawk wig, for the video!

    Splendid! You will need that. ...and the wheelies? Have you learned to do wheelies on your bike? On second thought, maybe it will be safer if you just fake the wheelies in photoshop.

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    Post by JoergS on Thu Apr 26, 2012 8:46 am

    Actually, I own a dirt bike (Yamaha WR 450 F), and also I can do wheelies...

    A few years ago, I was running a bet against a friend of mine. He said once you are older than 18, you can't learn wheelies anymore. I said I can learn it if only I want it.

    I found this company that runs weekend wheelie classes, and enrolled. They had a bunch of rat bikes (of all kinds) and an abandoned air field. You drive around in circles and try wheelie after wheelie after wheelie. The second day, I got it.

    It is actually quite easy, all you need is confidence.
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    Post by Gnome on Thu Apr 26, 2012 8:53 am

    I used to tell my nephews and neices that the family motto was "you can do whatever you want, the hard part is wanting it enough." Of course I made that up, hoping it might become the family motto. The mohawk is a great idea for the video, but if I were you I'd forget about the "leather chaps without pants" look- now that's something nobody over 18 should attempt!
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    Post by JoergS on Thu Apr 26, 2012 9:05 am

    Pantless chaps? certainly not for me!
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    Post by stoneagebowyer on Thu Apr 26, 2012 11:17 am

    Go for the Humungus look, or even Good Guy Max, or if you really want to be nuts, dress as the Feral Child. You will need a razor sharp boomerang to pull that off. A biker leather jacket would probably be enough though. And dont forget to starve yourself for a while and smear oil and dirt all over your face.
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    Post by sairaj999 on Sun Jun 10, 2012 8:18 pm

    lol!
    JoergS wrote:Pantless chaps? certainly not for me!
    yeeeeaahhhh hey pls give me the link when your vid will be on T.V. pls or post on your slingshotchannel Morning and what is trigger mechanism i love to see it smack
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    Post by jason.steinberger.3 on Tue Oct 16, 2012 6:36 pm

    this is why i have registered this is awesome! i will be attempting to build one of these very soon, thank you for the insperation!
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    Post by Pantheon on Sun Oct 21, 2012 10:25 pm

    Das ist TOLL! Sorry, I found this place because of the slingshot channel showing me some neat things about rubber used in crossbow construction/propulsion. Thanks, that might be inspiration for another project down the road!

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