"The ManuMortar" - New Design

Discussion in 'Show off your homemades!' started by JoergS, Feb 27, 2013.

  1. JoergS

    JoergS Administrator

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    Will meet Cold Steel again in 10 days. <br><br>I have worked hard on a design that they could sell. This has a few constraints. <br><br>It must work in hammer and support style<br>It must have a steel core and nice wood/micarta scales<br>It must be different<br>It must be able to use all kinds of bands that you can find on the market or make at home<br>It must work for beginners and advanced shooters alike<br><br>Not an easy task. But I think I got it! Digged out a very old fork design of mine. <br><br><a href="http://slingshotchannel.blogspot.de/2010/06/now-that-outdoors-swimming-season-has.html" target="_blank" rel="nofollow">http://slingshotchannel.blogspot.de/2010/06/now-that-outdoors-swimming-season-has.html</a><br><br>I used a handle that is not unlike the Morrhammer, but can be done with scales. The fork allows supprot style with comfort, and is great in hammer grip. <br><br>I made it from Multiplex, but of course it is easy to use a steel core and attach thick scales. <br><br>Flat bands can be attached OTP, just as normal.<br>Chinese bands, you have the hole through the fork tips. <br>Trumark bands (single strand tubes), you have the little "penisses" that can easily hold them. <br><br><br><img src="http://i75.servimg.com/u/f75/16/32/46/92/manumo10.jpg" border="0" alt=""><br><br><img src="http://i75.servimg.com/u/f75/16/32/46/92/manumo11.jpg" border="0" alt=""><br><br><img src="http://i75.servimg.com/u/f75/16/32/46/92/manumo12.jpg" border="0" alt=""><br><br><img src="http://i75.servimg.com/u/f75/16/32/46/92/manumo13.jpg" border="0" alt=""><br><br><img src="http://i75.servimg.com/u/f75/16/32/46/92/manumo14.jpg" border="0" alt=""><br><br>The bands hold without any attachment other than the friction, but for safety, I used a bit of rubber and secured them firmly. <br><br>A great shooter!<br><br><img src="http://i75.servimg.com/u/f75/16/32/46/92/manumo15.jpg" border="0" alt="">
     
  2. FIAAO

    FIAAO Failureisalwaysanoption

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    Great! Ive been wondering what would be the result when Lynn Thompson said "We look forward to work with him in the future" in the IWA-vid! You know what I like the most? The name <img src="http://illiweb.com/fa/i/smiles/icon_smile.gif" alt="Smile" longdesc="2">
     

  3. Saderath

    Saderath Senior Member

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    Wow! Once again you prove that you are truly talented! That attachment method is really unique and well thought out!
     
  4. onnod

    onnod Im from Holland, isnt that weird?

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    Very nice and clever, but is finger support comfy with such wide forks?
     
  5. larrys

    larrys New Member

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    I really like this design. two suggestions though, a lanyard hole in the bottom and an adjustable ghost ring sight. <img src="http://illiweb.com/fa/i/smiles/icon_cheers.png" alt="cheers" longdesc="28">
     
  6. Bert the Welder

    Bert the Welder New Member

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    I like the look of it Joerg! But if I may.....<br>I don't think your "penises" are thick enough.......PARDON!?!?! The "shaft" anyway......especially in "wood". Even "hard" "wood"...... <br>Also, with an eye to production building, that extra "mount" may be too complex to manufacture cost effectively. Too small to cast and have strength. Could make it a separate, bolt on piece, but that adds cost and still unknown as to being strong enough. <br>Don't mean to be critical, just thinking out loud. <br>What about having the "penises" out the back side of the legs? That could be cast more easily and have enough strength as the pull would be lineal. Could also be machined with fewer moves if CNC'd and/or bolted on as a threaded post into the legs.<br>Again, just friendly thoughts based on a bit of fabrication experience. You know Cold Steel better than I, and how they build, so toss all this out if I'm pissing up wind. <br>BTW
     
  7. tokSick

    tokSick Senior Member

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    Very nice slingshot, i really like the all-in-one concept.<br>PS: When i read" Cold Steel" i think about a foldable blade in the handle.
     
  8. Tysonspapa

    Tysonspapa New Member

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  9. JoergS

    JoergS Administrator

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    <table width="90%" cellspacing="1" cellpadding="0" border="0" align="center">
    <tr><td><span class="genmed"><b>Bert the Welder wrote:</b></span></td></tr>
    <tr><td class="quote">
    <br>I don't think your "penises" are thick enough.......PARDON!?!?! The "shaft" anyway......especially in "wood". Even "hard" "wood"...... <br>Also, with an eye to production building, that extra "mount" may be too complex to manufacture cost effectively. Too small to cast and have strength. Could make it a separate, bolt on piece, but that adds cost and still unknown as to being strong enough. <br>Don't mean to be critical, just thinking out loud. <br>What about having the "penises" out the back side of the legs? That could be cast more easily and have enough strength as the pull would be lineal. Could also be machined with fewer moves if CNC'd and/or bolted on as a threaded post into the legs.<br>BTW</td></tr>
    </table>
    <span class="postbody"><br><br>Well, the prototype is made from wood, but the final one would be steel. Even the wood is strong enough. Don't forget that the strongest bands you find from Trumark and so on only have about 5 kg pull per side, and the majority of that low force rests on the top of the fork (on the edge). <br><br>Let's not forget that Trumark slingshots are made from 8mm aluminum rods. Those are so soft that I can bend them with my hands, effortlessly. Still they hold a strong band. <br><br>If these things are made from steel, no issues at all of course. They may be attached differently (welded, bolted, the works). I guess Cold Steel will do that.<br><br>I like the fact that these little things can be dismounted - they look kind of funny. <br><br></span>
     
  10. mhpr262

    mhpr262 Member

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    Why not just use the proven old "steel ball in tube" attachment method instead of the penis method? There are already holes in the fork tips anyway (for looped tubes I presume).<br><br>If Cold Steel wants to offer their customers something truly unique they ought to bring out a design a rotating fork. That is something that ought to be easy for such a big manufacturer while it is pretty difficult to build something like that at home. And of course it's very useful, too.
     
  11. JoergS

    JoergS Administrator

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    The ball in tube method isn't "proven", it is actually very dangerous and I advise against using it. If the ball is a bit too small (keep in mind people may tinker with it and use a different ball than the original one), then it may slip through and catastrophic things will happen.<br><br>Daisy shipped slingshots with that method a while ago, and at least three shooters lost an eye. Daisy nearly declared bankruptcy because of that. The product was recalled.<br><br><a href="http://www.cpsc.gov/en/Recalls/2006/Slingshots-Recalled-by-Daisy-Manufacturing-Due-to-Risk-of-Serious-Eye-Injury/" target="_blank" rel="nofollow">http://www.cpsc.gov/en/Recalls/2006/Slingshots-Recalled-by-Daisy-Manufacturing-Due-to-Risk-of-Serious-Eye-Injury/</a><br><br>Rotating prongs aren't very new either. Trumark uses that concept on most of their models. My slomos have shown that it doesn't really work, the ball passes the fork while the prongs are still in their cocked condition. <br><br>I experimented with self centering rotating prongs a couple of years back. It works, but there is no clear improvement - only another factor that you can't control (a slight difference in band length/strength will cause uneven fork alignment). <br><br>If Cold Steel brings out this model, then they will have a very unique product - capable of all band sets on the market, including the superior Over The Top flat bands. The best handle, plus compact dimensions. <br><br>Yes, there are some small manufacturers that make comparable frames, and yes, you can make such slingshots at home. But there is no mass manufacturer who has anything comparable. <br><br>
     
  12. slingpit

    slingpit Slingshot addicted

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    Very nice design.
     
  13. Antraxx

    Antraxx #7

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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>Daisy shipped slingshots with that method a while ago, and at least three shooters lost an eye. <br>
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    <span class="postbody"><br><br>That is some serious stuff...<br><br>What do you think about a constrictor knot behind the ball to keep it inside?</span>
     
  14. Frage:<br>Warum nicht lieber Klemmen?<br>Ob man Flachbänder festklemmt, oder mit Gummiband festwickelt, oder in einen Schlitz steckt, solange da kein direkter Zug drauf ist, hält dieses.<br>(Scharfe Kanten abgesehen!)<br>Dürfte viel leichter zu giessen sein, als diese!<br>Gut zusetzlicher Arbeitschritt mit Bohrung, und Gewinde, aber ich kann China Tubes Flachbänder, Fahrradschläuche, alles viel leichter Klemmen, und wechseln!<br>-<br>Ist dann bloss die Frage, als Over the Top, oder Seitlich angebracht...!<br>-<br>Von den Abmessungen her, sind die Forks höhen als Anfänger, oder Fortgeschrittener wohl voll OK!<br>Die breite, ist halt so eine Sache.... <br>Als Anfänger gerade noch OK, könnte eher breiter sein!<br>Als Profi.....<br>Und absoluter Hammergriffstyl.... Zeigefinger, Daumen als unterstützung..... geht wohl nicht!<br>Hosentaschen Schleuder ist es auch nicht......<br>Kugelmagazin?<br>-<br>Frage: Wer würde sich so was Kaufen, wenn man schon Erfahrung mit Schleudern gemacht hat?
     
  15. von_z2

    von_z2 New Member

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    <div>Lol, "penises..."</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>
     
  16. Bert the Welder

    Bert the Welder 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>Well, the prototype is made from wood, but the final one would be steel. Even the wood is strong enough. Don't forget that the strongest bands you find from Trumark and so on only have about 5 kg pull per side, and the majority of that low force rests on the top of the fork (on the edge). <br><br>Let's not forget that Trumark slingshots are made from 8mm aluminum rods. Those are so soft that I can bend them with my hands, effortlessly. Still they hold a strong band. <br><br>If these things are made from steel, no issues at all of course. They may be attached differently (welded, bolted, the works). I guess Cold Steel will do that.<br><br>I like the fact that these little things can be dismounted - they look kind of funny. <br><br>
    </td></tr>
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    <span class="postbody"><br><br>Ah! I thought the direction of pull was the back from the penises. Over the fork would help. And I guess 5kg isn't much. Still "looks" meek, but I know you test thoroughly. I guess passing the tube through the holes first, then onto the penises would put more strain on them as the pull force would be more direct and at a more 90* angle.</span>
     
  17. Bert the Welder

    Bert the Welder 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 ball in tube method isn't "proven", it is actually very dangerous and I advise against using it. If the ball is a bit too small (keep in mind people may tinker with it and use a different ball than the original one), then it may slip through and catastrophic things will happen.</td></tr>
    </table>
    <span class="postbody"><br><br>.....that and it's well known that a penis works fine with out balls, but balls alone are useless without a penis........ <img src="http://illiweb.com/fa/i/smiles/icon_scratch.png" alt="scratch" longdesc="33"><br><br>OK, that's it.....I'm not typing "penis" anymore. <br>"Nipple"...? <img src="http://illiweb.com/fa/i/smiles/icon_redface.gif" alt="Embarassed" longdesc="10"><img src="http://illiweb.com/fa/i/smiles/icon_eek.gif" alt="Shocked" longdesc="5"><img src="http://illiweb.com/fa/i/smiles/icon_lol.gif" alt="Laughing" longdesc="7"></span>
     
  18. JoergS

    JoergS Administrator

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    Well, my idea is: If it holds when made out of wood, it is 100% safe when made out of steel. <br><br>BTW, I did change the fork a bit, went from 6,5cm to 5cm... now it is perfect for the support style shooters, too. Beginners may prefer the wider fork. I'll present both to Cold Steel, maybe they want to settle for two versions. <br><br>
     
  19. Tobias

    Tobias 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>BTW, I did change the fork a bit, went from 6,5cm to 5cm... now it is perfect for the support style shooters, too. Beginners may prefer the wider fork. I'll present both to Cold Steel, maybe they want to settle for two versions. <br><br>
    </td></tr>
    </table>
    <span class="postbody"><br><br>Great shooter!</span>