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Thread: Lavvu

  1. #1
    Join Date
    Jan 2010
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    Default Lavvu

    Yet another DIY-project...
    I have been playing with Google Sketchup to make a one-piece lavvu from a standard plastic tarpaulin.

    The tarpaulin is 8 by 5 meters and in 180gram/sqm weight.



    By drawing the tarp and a circle with radius = tarp long side / 2 you get a pie segment that determines how big the lavvu will be.
    My tarp (8x5m) gives a pie 'segment' with radius 4m, and pie outer rim 14,6m.
    The radius will be the length of the outer wall of the lavvu and the outer rim of the pie segment will be the circumference of the lavvu when erected.

    So by simple maths the radius of the lavvu will be 14,6/3,14/2=2,3m (r=O/pi/2)
    The height will be (according to Pythagoras) the square root of 4*4 - 2,3*2,3=3,25m. And Sketchup gives the inner area 16,8 square meters...

    Now it's just to draw the circle/pie segment on the tarp and cut it out.
    I also cut out a small circle at the 'top'/the center, for the smoke hole.
    Along the edges where the sides will meet on the lavvu, make 6 times 2 holes at each edge to allow the edges to be "sewn" together with sticks, like the indians made up their Tipis. I fitted aluminium eyelets to the holes.

    Then get 12 pine poles, ca 4,3 m long.
    Tie 3 of them together at just under 4 meter and erect them with radius 2,3m. After that erect the rest of the poles at equal distances and cover it all with the tarp. Then line up the holes on the edges and fasten them with short sticks.
    Done!

    The erected lavvu.


    The door, 2 pieces of scrap tarp material glued and 'sewn' together with washing line.

    The pine poles gives the door rigidity. They should be so long so they rest on the 2 standing poles at the door.

    Details of the sticks holding the lavvu together. The door is just hanging from one of the sticks with a piece of washing line.


    The 'Berjas', a piece of double burlap with pockets sewn in the corners for stones. The Berjas is used for rain/mosquito protection and fire draft regulation. It's manouvered with a pole from the outside.



    Entrance.


    Plenty of room, 7 people can sleep with spare room over.










    So far, me and our youngest daughter have slept 5 nights in it
    Last edited by MickeS; 23-06-2011 at 14:26.

  2. #2
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    Default

    Nice one Micke thats looks like a fun but practical project .
    nice one
    Twodogs
    Twodogs Wool bush shirt ,,,,you know you want one ......

  3. #3

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    WOW !

    That is one great project.
    Its 6 oclock, the dogs in yer room, its pay day,GET UP!!

    my dad 1978

  4. #4
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    Default

    Great project, thanks for sharing.
    "No good decision was ever made in a swivel chair" - George S. Patton, Jr

  5. #5
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    Default

    Brilliant and inspiring, thanks for posting it up.

    How have you secured it, as in the bottom edge?
    Tone
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  6. #6
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    Default

    Great stuff... How well does the lavvu handle the smoke from the fire?
    It'll shine when it shines, you might thinking I'm wasting time, but I'm just a good ol' boy who's learned to wait.

  7. #7
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    Default

    Really brilliant post matey! Big thanks. I bet it will handle the snow very well to.

  8. #8

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    Wonderful stuff, MickeS.

  9. #9
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    Feb 2010
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    Normandy, France. Originally Kent, UK.
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    Default

    Now I'm really impressed by that. Great pix. Thanks for sharing it.

  10. #10
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    Default

    Thanks all
    No fire yet, tonight it'll have it's baptism... we have had quite warm nights so I haven't bothered with a fire yet. Almost no mosqiutos either, the first night we had to burn a birch tinder fungus to keep 'em eway.
    It has withstood 3 nights of heavy rain, at the most some 50-60mm/day, and it let in just some drops of water in the fire area. The only drawback so far with the plastic is that it's very noisy in the rain.
    I've staked it to the ground with eight DIY snow-/sand stakes made from angled alu profiles, 300mm long and 45x45mm I believe them where.
    The plan is to keep it up all year round, we also have a Tentipi Safir 7, but that one's too expensive to keep up all the time.
    The tarpaulin for this one cost like 25 pounds so it's bit cheaper than a Tentipi=D, and not so costly to replace when worn.

    /Micke

    edit: Eventually we'll use the lavvu for cold smoking meat and fish, the traditional way.
    Last edited by MickeS; 23-06-2011 at 17:20.

  11. #11
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    So by simple maths the radius of the lavvu will be 14,6/3,14/2=2,3m (r=O/pi/2)
    The height will be (according to Pythagoras) the square root of 4*4 - 2,3*2,3=3,25m.


    That's a cracking Laavu mate - but I'm so glad you did the "simple maths".

    Eric
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  12. #12
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    Brilliant. I might have a go at this during the summer.

    Best Wishes
    David

  13. #13
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    Default

    Nice one

  14. #14
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    Default

    Was playing around with the sums to see sizes you can make from other tarps, and thought that other might benefit from the genralized formula.

    All credit to the OP, as he did all the hard work and its a brilliant idea.





    Uploaded with ImageShack.us

  15. #15
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    oooo sums, I luv sums, but i keep running out of fingers and your sums have letters in them

  16. #16
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    Default

    Thanks Benjy for simplifying? my mildly confusing math explanation =D

    So far - 22 nights in the lavvu...

  17. #17
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    Excellent post Micke, very interesting.

  18. #18
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    Thats brilliant! Mmmm gonna have a play with that handy looking little program, and thanks for the equations, I'm just at planning stage ofa llavu and been struggling to get my head around it amidst christmas cooking... women? Multifunction? Nahhhhh
    Last edited by TurboGirl; 30-12-2012 at 11:48.
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