The "Da Vinci" Slingshot Cannon Challenge

Discussion in 'New project ideas' started by JoergS, Sep 14, 2011.

  1. JoergS

    JoergS Administrator

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    The "Da Vinci" project is slowly maturing.<br><br><img src="http://1.bp.blogspot.com/-7tKpTtqzmj8/Tm9DyONY7aI/AAAAAAAAA4Y/pVjCXUoas38/s1600/Da+Vincy+Schleuderkanone+Zeichnung.jpg" border="0" alt=""><br><br>The book about Leonardo's giant crossbow arrived,<br><br><a href="http://www.amazon.de/Leonardo-Vincis-Crossbow-Matthew-Landrus/dp/354068915X/ref=sr_1_1?ie=UTF8&qid=1316009704&sr=8-1" class="postlink" target="_blank" rel="nofollow">See the book on amazon</a><br><br>and also I found the original documentary from ITN Factual Television (2002), which was telecast in Germany by The Discovery Channel a few years back.<br><br>Very insightful. Turns out that da Vinci never built the thing, he only sketched it out for the Duke of Milan, Ludovico Sforza, sometime between 1482 and 1492. Interesting: He promised that it will shoot a 100 lbs (44kg) stone ball (roughly 12" or 31 cm diameter) 28 yards (25 meters) far, and a 10lbs (4,4kg) ball 280 yards (250 meters) far.<br><br>The ITN team had three months and probably more than 10 craftsmen to build the crossbow. I think they spent at least 100,000 Euros. A fail, in the end. The 20 lbs ball they used did not even fly 20 yards. Then the prod broke, so they gave up. Pathetic attempt, really.<br><br>Just for the fun of it, I ordered a 1:100 scale plastic model of the Giant Crossbow, can't wait.<br><br><a href="http://www.amazon.de/Leonardo-Vinci-00501-Gro%C3%9Fe-Armbrust/dp/B003E47HG4/ref=sr_1_6?ie=UTF8&qid=1316009766&sr=8-6" class="postlink" target="_blank" rel="nofollow">Here it is on amazon</a><br><br>Anyway, I want to make a slingshot cannon that exceeds the ancient promise, and I want to do it in three WEEKS, not months. With hopefully just two assitants. For under 3,000 Euros.<br><br>This will be pretty much a variation of my previous slingshot cannon, with a few changes. I sketched it for the Tapefilm guys, who need to find a TV channel as a buyer (sorry for the German text).<br><br>- Length will be 7 meters total, 6 meters stretch.<br><br>- Four wheels<br><br>- 500 kg to 1000 kg draw weight (1,100 to 2,200 lbs)<br><br>- Adjustable shooting angle<br><br>- Ratchet like cocking mechanism (not enough room for a four arms "cross" winch)<br><br>If all goes well, this can be done before the winter kicks in (early November 2011).<br><br>My brother, who is a physicist, figured out that I will be able to shoot the 100lbs ball about 34 meters with 500kg draw. I absolutely can't wait to feel the earth shaking when that ball hits the ground!<br>
     
  2. Tobias

    Tobias New Member

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    nice projekt! Jörg, is the canon on the picture above the crossbow from leonardo? it looks different! it is not the same as your model crossbow...
     

  3. JoergS

    JoergS Administrator

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    No, that picture is mine <img src="http://illiweb.com/fa/i/smiles/icon_smile.gif" alt="Smile" longdesc="2"><br><br>The new cannon will basically be an enlarged version of the one we used on that poor old white car... the concept worked great, I think.
     
  4. WildBill

    WildBill The Silly Song Guy

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    What ever happened to this concept?

    -Wild Bill
     
  5. Withak

    Withak aka Whitehawk!

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    I just kind of assumed it took a slightly different form here:

    [ame="http://www.youtube.com/watch?v=_AySuafZ8to"]http://www.youtube.com/watch?v=_AySuafZ8to[/ame]
     
  6. Walb

    Walb How did I get here?

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    Well, Leo definetly lived in the wrong time, I think.
    Imagine him as a member of this forum :D
     
  7. bigdh2000

    bigdh2000 Administrator

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  8. WildBill

    WildBill The Silly Song Guy

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    I thought that this post was made after the cannon Withak linked was built and filmed. He even mentioned the white car in the OP.

    -Wild Bill
     
  9. Withak

    Withak aka Whitehawk!

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    Got it - I missed that part of his 2nd comment.

    So then it remains - where is the big cannon Joerg!?
     
  10. pipesmoker

    pipesmoker Member

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    Necromancy kills.

    -Wild Bill
     
  11. JoergS

    JoergS Administrator

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    Nobody wanted to cough up the money... so it never happened. And since I am now back at a full time job, not much chance this will change. Oh well, some projects never make it.