1. Post #1
    Gold Member
    Armandur's Avatar
    March 2009
    666 Posts
    On and off for the past three weeks, me and my family have been to our summer house in the High Coast in Sweden (It's about a 40-50min drive from where we live) and I've begun building my third trebuchet.

    (A trebuchet is a kind of catapult which uses a counterweight)

    This is the current state:



    I got permission from my grandfather to cut trees to build with. So far I've only been using wood I've felled myself. Most of it will be Picea abies (Norwegian spruce or Gran in Swedish, http://en.wikipedia.org/wiki/Picea_abies)

    It's about two meters across, 3 - 4 meters long and when the beam is still it will be about 4.5 meters tall. Currently the frame is about 2.5 meters high.

    Some pictures from the past weeks:




    You can see the second trebuchet I built in this picture.





    The bucket for the counterweight stones is going to be about 90*90*90cm, but I'm still not sure as to how I will design it, since it would need to take quite alot of stress.

    Also, the bucket on this trebuchet will not be directly connected to the beam, but it will have a smaller axle (Is this the right word?) between it and the beam. This is to allow the bucket to fall straighter.

    This is how the beam will look: (The one closest to the camera)


    I will be continuing this build on wednesday. I don't think I will be able to finish all of it this summer. Since this is the only free week I have left. After this one I'm going to the World Scout Jamboree for two weeks, then I'll work for one week and then school starts.
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  2. Post #2
    Gold Member
    Psychokitten's Avatar
    July 2009
    12,223 Posts
    Neat!

    I wish I had the time, space and resources to build something like this.
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  3. Post #3
    Gold Member
    Armandur's Avatar
    March 2009
    666 Posts
    I really don't find it that hard. I think I've always liked building things. Building the smaller one has probably helped me alot, but I just think of these things sometimes and sketch them down. I don't really have a schematic either, except for a paper with some lines and some numbers, but most of it's in my head by now.

    I imagine lumber being the hard thing to come by in this build, though I'm lucky we own such a large area around our Summer house. I had no previous experience with felling trees either, but they were small enough, so I could push them down once I had sawed through most of the tree.

    I have yet to use a single powertool on this For sawing I used a freakish big handsaw. (It's as long as my leg and the teeth are about 1.5cm long, pics of it later )

    I will be treating all beams, and I was thinking about buying tar, but my mothers husband told me I could use old waste oil and mix it 50/50 with turpentine. Has anyone else done this, by the way?

    Edited:

    I'm sorry if this post was a bit incoherent; It's 03:00 AM here and I'm going to bed
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  4. Post #4
    Gold Member
    Buck.'s Avatar
    February 2007
    2,197 Posts
    Should have used a big manly axe for chopping down the trees!

  5. Post #5
    Gold Member
    lemongrapes's Avatar
    February 2009
    2,609 Posts
    would you consider making a floating arm trebuchet? they lack the historical authenticity but are much simpler to fire and go a lot further.
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  6. Post #6
    Gold Member
    Psychokitten's Avatar
    July 2009
    12,223 Posts
    Are you going to give it wheels so you can move it onto a suitable firing range?

  7. Post #7
    Gold Member
    Armandur's Avatar
    March 2009
    666 Posts
    It's built right at a suitable firing range . Six years ago the 500m-1km stretch of forest right next to our house were felled by the land owner. Now it's just young trees all the way. Perfect area to shoot at

    Edited:

    would you consider making a floating arm trebuchet? they lack the historical authenticity but are much simpler to fire and go a lot further.
    I know about the design, but I didn't fancy buying the wood to make it, since I could make this trebuchet for next to nothing

  8. Post #8
    FreeBee's Avatar
    March 2007
    230 Posts
    I really am going to follow this. I love medieval warcraft, and especially trebuchets. I used to build them with my little brother back in the days out of legos. We bombarded eachother with marbles while hiding between self made mountains of boxes and other junk. Fun times.

  9. Post #9
    Gold Member
    Armandur's Avatar
    March 2009
    666 Posts
    I have now drilled the holes for the axle and put it in place. Currently building the sidesupports and treating ghe catapult with tar.

  10. Post #10
    Gold Member
    Armandur's Avatar
    March 2009
    666 Posts
    Finally got home and I'm currently packing for going to the World Scout Jamboree in a few hours. Almost finished the trebuchet yesterday. Got the beam in place and tarred the whole thing. Got a few things left though.

    A pulley system for cocking the trebuchet ( I have some ideas for this that could work )
    The counterweight bucket (Needs to STURDY!)
    Trimming the release pin and the length of the beam.

    Sorry guys, but this has been put on hold for at least a month before I can continue to work on it. But I'll do some really fun stuff instead!

    Starting tomorrow; I'll be going to the World Scout Jamboree 2011 in southern Sweden for two weeks (about 40 000 will be attending).
    When I get home I'll start my third and final week at my summerjob at a childrens camp. Imo it's one of the best jobs you can have in the summer. (Paddling canoes, bathing, playing football, sleeping outdoors!)

    It pays quite nicely too. I'll get about 13500 SEK (which is roughly 2100 USD) when I'm done.

    Some pictures from the past week:











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  11. Post #11
    JumpinJackFlash's Avatar
    December 2010
    2,175 Posts
    I will be treating all beams, and I was thinking about buying tar, but my mothers husband told me I could use old waste oil and mix it 50/50 with turpentine. Has anyone else done this, by the way?
    It works, heat the oil though, don't let fire touch it while you're doing it or you'll be sorry.

  12. Post #12
    Shellman Deluxe's Avatar
    August 2009
    1,177 Posts
    Impressive, you just brought Gmod to the next level
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  13. Post #13
    L33T Lau Coder
    Science's Avatar
    April 2011
    1,813 Posts
    I remember we had to make one of these is scouts. We decided to test it out on the scout leaders hut with a pot of boiling spagettios.

    Worked out perfectly.
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  14. Post #14
    Gold Member
    ewitwins's Avatar
    December 2009
    14,178 Posts
    Finally got home and I'm currently packing for going to the World Scout Jamboree in a few hours. Almost finished the trebuchet yesterday. Got the beam in place and tarred the whole thing. Got a few things left though.

    A pulley system for cocking the trebuchet ( I have some ideas for this that could work )
    The counterweight bucket (Needs to STURDY!)
    Trimming the release pin and the length of the beam.

    Sorry guys, but this has been put on hold for at least a month before I can continue to work on it. But I'll do some really fun stuff instead!

    Starting tomorrow; I'll be going to the World Scout Jamboree 2011 in southern Sweden for two weeks (about 40 000 will be attending).
    When I get home I'll start my third and final week at my summerjob at a childrens camp. Imo it's one of the best jobs you can have in the summer. (Paddling canoes, bathing, playing football, sleeping outdoors!)

    It pays quite nicely too. I'll get about 13500 SEK (which is roughly 2100 USD) when I'm done.

    Some pictures from the past week:











    Mother of God, please tell me that wood is just wet and not laquored.

  15. Post #15
    Scum's Avatar
    September 2011
    236 Posts
    snip

  16. Post #16
    Played it for the plot
    Dennab
    October 2008
    14,789 Posts
    Mother of God, please tell me that wood is just wet and not laquored.
    looks wet, ground is wet too

  17. Post #17
    Hax4's Avatar
    July 2007
    27 Posts
    Should have done a floating arm trebuchet

  18. Post #18
    Gold Member
    Armandur's Avatar
    March 2009
    666 Posts
    Mother of God, please tell me that wood is just wet and not laquored.
    Haven't looked here for a while, but what you see there is just the tar in the process of drying.

    Edited:

    Picture of the bucket and the saw I used to fell the trees and saw the lumber