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  1. B

    Matty's Marvelous Modular Monstrosity

    What size and section did you go for?
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    Nice clean way to make composite

    Hi Aviator 168, Interesting technique, thanks for sharing. How do you stop air pockets getting trapped between the skins and the foam when you apply the vacuum? I would think this would be a problem for larger layups.
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    Matty's Marvelous Modular Monstrosity

    Yes a good question! I guess being able to get full aileron control movement upto rough air and or manoeuvring speed and one third control deflection above that?
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    Matty's Marvelous Modular Monstrosity

    Apologies, for protrusions read pultrusions.
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    Matty's Marvelous Modular Monstrosity

    I agree this figure looks low compared to machine made protrusions but I guess he wanted a "certified" stress he could work to. There's not much out there data wise. I'm sure Marske's figures are accurate but for a sailplane type wing you may have to design for deflection rather than max. strength.
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    Matty's Marvelous Modular Monstrosity

    Sorry to load up your kindle but this is an interesting project with lots of detail on its main spar which uses protrusions. MITE wing design and construction.pdf
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    Matty's Marvelous Modular Monstrosity

    Lots of shear force and bending moment diagrams! Enjoy.
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    Matty's Marvelous Modular Monstrosity

    Hi Foundationer, Sir Sydney Camm a great designer. Have you seen this book, The Glider by Stelio Frati? I think you would find it very interesting and maybe relevant to your project. I couldn't attach it, please Google it.
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    Matty's Marvelous Modular Monstrosity

  10. B

    Have I got my spar bending / shear diagrams right?

    Oops. Hi Foundationer, For the structure you describe, which is typical for modern composite glider construction, the Shear Force increases, as you have drawn, to a peak at the root rib. Let's call this positive for the sake of orientation. This lift force is reacted at the root rib into...
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    Have I got my spar bending / shear diagrams right?

    Hi Foundationer, For the structure you describe, wh
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