Science Toy Number VIIII Collapsible Trebuchet
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  1. #1
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    Science Toy Number VIIII Collapsible Trebuchet

    This little trebuchet launched golf balls well over 100 feet and I’m sure with a little tuning we can get much more out of it. The math teacher wants to combine our classes in the Spring for a few days. She found a project involving trebuchets. I have made hundreds of wooden ones over the years in workshops for teachers. They are too small to be much fun so I designed this one to fold up and take less space. One down, 11 to go!!!
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    Dave Reber
    Wadsworth Ohio

  2. #2
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    missouri
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    Re: Science Toy Number VIIII Collapsible Trebuchet

    thats cooler than owl crap! nice cleen well done! pigpen

  3. #3
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    Re: Science Toy Number VIIII Collapsible Trebuchet

    That's really cool! Those students are lucky to have such a creative teacher!!
    "hope for the best, prepare for the worst"

    Some of my equipment:
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  4. #4
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    Re: Science Toy Number VIIII Collapsible Trebuchet

    You have to stop posting these things. Every time I see one of your post I hate my education more and more. My taxes went up 29% for schools this year! There should be more teachers like you out there. If I ever have Kids I might have to move to your school district. I think that everyone on this forum should take all of your posts and plaster their schools with them. Education for the education system! Keep up the fantastic work!!!

  5. #5
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    Re: Science Toy Number VIIII Collapsible Trebuchet

    Oh boy! I can't wait to see what kind of trouble I can get myself in with one of those! It's a good thing you weren't my instructor. But seriously, good job making learning fun for your students.

  6. #6
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    Re: Science Toy Number VIIII Collapsible Trebuchet

    Thanks guys. It is a fun build. I got some kids wanting to fling flaming tennis balls. The board may not like that idea.
    Dave Reber
    Wadsworth Ohio

  7. #7
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    Re: Science Toy Number VIIII Collapsible Trebuchet

    Quote Originally Posted by Reebs View Post
    Thanks guys. It is a fun build. I got some kids wanting to fling flaming tennis balls. The board may not like that idea.
    Well, don't have them throw them at the board members then! Just stick to the golf balls or go to billard balls instead when targeting the board.


    Another good project! It's good to see teachers that still teach things that interest students and don't worry about the PC BS about "dangerous items". Of all my teachers in Jr. high and High school the ones I remember are my shop teachers, my drafting teacher, and the science teacher who liked to do hands on demo's of things like this.
    .



    No government ever voluntarily reduces itself in size. Government programs, once launched, never disappear. Actually, a government bureau is the nearest thing to eternal life we'll ever see on this earth!

    Ronald Reagan

  8. #8
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    Re: Science Toy Number VIIII Collapsible Trebuchet

    This will sound counter intuitive, put the frame on wheels. Wheels will change the way the weight falls. Without wheels the weight falls in a circular path. Will wheels the weight falls straight down and increases the kill range.

  9. #9
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    Re: Science Toy Number VIIII Collapsible Trebuchet

    That is correct.
    That is something the kids will "discover" I have some old roller skates with wood platforms on them to sit the treb.
    Dave Reber
    Wadsworth Ohio

  10. #10
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    Tucson, AZ
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    Re: Science Toy Number VIIII Collapsible Trebuchet

    Great work, looks like lots of fun. Sooooo .......... where's the blueprints?

  11. #11
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  12. #12
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    Re: Science Toy Number VIIII Collapsible Trebuchet

    I do not have blue prints but I do some more info. The following is my school web page http://www.blackriver.k12.oh.us/~dreber/
    Once there click on the Reebz welding link on the left of the page. The throwing arm should be at a 4:1 ratio Meaning the section withe projectile should be 4 times longer than the section holding the counter weight.
    Dave Reber
    Wadsworth Ohio

  13. #13
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    Oct 2008
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    Re: Science Toy Number VIIII Collapsible Trebuchet

    Reebs,

    Very neat project the kids must have loved the testing.
    I thought I'd point it out that VIIII is not a Roman numeral.

    VIII is 8
    IX is 9

    Just in case you were to paint it on there.

  14. #14
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    Re: Science Toy Number VIIII Collapsible Trebuchet

    neat! but just how do you attach the golf ball???
    -- fred

    Lincoln 180C MIG

  15. #15
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    Re: Science Toy Number VIIII Collapsible Trebuchet

    Easygo I'm not sure how I did it but I messed up a bunch of my title/roman numerals. I looked at my past post over x-mass and discovered my errors.
    Brain fart
    Dave Reber
    Wadsworth Ohio

  16. #16
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    Re: Science Toy Number VIIII Collapsible Trebuchet

    fredf I will take a picture to night.
    Dave Reber
    Wadsworth Ohio

  17. #17
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    Re: Science Toy Number VIIII Collapsible Trebuchet

    Totally cool project. I mean to build a trebuchet myself sometime, maybe welded, maybe not.

    I suppose if you built such a thing and took it to a school here in California, you would have to be careful not to tell any teachers that it's a modern replica of an ancient war machine. Otherwise, they'd all wet their pants, call in the SWAT team, and order mental trauma counseling for the students.

    Tim

  18. #18
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    Re: Science Toy Number VIIII Collapsible Trebuchet

    Teaching in the country has some advantages. Pay is not one of them, but i would not trade my spot
    Dave Reber
    Wadsworth Ohio

  19. #19
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    Re: Science Toy Number VIIII Collapsible Trebuchet

    What a cool project, Wadworth, Ohio must be a great place to work/live!
    Bruce
    The Welding Chef
    Lincoln Weld-Pack 3200
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    Stanford Hill Farm

  20. #20
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    Re: Science Toy Number VIIII Collapsible Trebuchet

    Thanks it fits me well.
    Dave Reber
    Wadsworth Ohio

  21. #21
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    Re: Science Toy Number VIIII Collapsible Trebuchet

    Fred here is a poor picture (The last golf ball is stuck in a tree)
    The idea is real simple I drilled a hole in the golf ball and put an eye screw in it. Then tie a string or wire to the eye screw, The other end of the string has a loop on it. The loop slips over the hook on the throwing arm (see picture 3 of post one). The angle of the hook is important if it is too straight the G. Ball flies straight up. If the hook is bent forward too much it slams in the ground.
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    Dave Reber
    Wadsworth Ohio

  22. #22
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    Re: Science Toy Number VIIII Collapsible Trebuchet

    Hmm... I was expecting a fabric sling similar to those I see Pumpkin chunkin.
    .



    No government ever voluntarily reduces itself in size. Government programs, once launched, never disappear. Actually, a government bureau is the nearest thing to eternal life we'll ever see on this earth!

    Ronald Reagan

  23. #23
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    Re: Science Toy Number VIIII Collapsible Trebuchet

    The sling is better for distance but adds difficulty for students to "get right".
    The wire adds drag which reduces distance. The sting should be be long enough to have the golf ball rest under the axel.
    Dave Reber
    Wadsworth Ohio

  24. #24
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    Re: Science Toy Number VIIII Collapsible Trebuchet

    UPDate
    Crappy Picture all 12 trebs. I got some barbell weights and welded handles to them for counter weights.
    Man this took time. 250 plus holes to drill.
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    Dave Reber
    Wadsworth Ohio

  25. #25
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    Re: Science Toy Number VIIII Collapsible Trebuchet

    Quote Originally Posted by DSW View Post
    Hmm... I was expecting a fabric sling similar to those I see Pumpkin chunkin.


    Cool Show!!!

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    I am not completely insane..
    Some parts are missing

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