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  1. #1
    GrizzlyAdams's Avatar
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    Video: The Making of a GrizzBridge (part 2) Endcap Origami

    The thread on part one of the series is here.

    Part two of the series spends a remarkable 15+ minutes talking about making an endcap! Almost as long as it takes to actually make it and sew it in. Closes with the webbing being sewn in, so the video ends with a completed hammock body, sans suspension or bugnet....so there'll be more...

    Note in passing...if you don't intend to sew a bugnet to the top of the endcap, then
    a different type of endcap such as the one demonstrated by hangnout is bound to be easier.
    There are lots of ways of skinning the endcap cat.

    Last edited by GrizzlyAdams; 04-24-2011 at 13:06.
    Grizz
    (alias ProfessorHammock on youtube)

  2. #2
    Dutch's Avatar
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    I finally know how to make and end cap now. Thanks Grizz.
    Peace Dutch
    GA>ME 2003


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  3. #3
    Senior Member moski's Avatar
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    You are the fastest around here Dutch
    Now, i will have look at this video in peace
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  4. #4
    Senior Member Walking Bear's Avatar
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    That end cap looks a lot better than my first one.
    Thanks for the info.
    Knowledge is knowing a tomato is a fruit. Wisdom is not putting it in a fruit salad.

  5. #5
    Yoda's Avatar
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    Great stuff again Grizz, very interesting to see how one (close to mine) is made! Here's hoping this series of videos is still up when I figure out how to sew!
    Formerly known as "Cranky Bear"....

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  6. #6
    AScott's Avatar
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    Wow, this looks like quite an undertaking. Maybe I'll stick to a gather end for my first DIY hammock. I'm not sure I can wrap my mind around this without seeing one of these in person. Maybe someone will have one if I ever make it to one of the group hangs.
    If your lucky enough to be outdoors, your lucky enough!


  7. #7
    GrizzlyAdams's Avatar
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    Quote Originally Posted by Dutch View Post
    I finally know how to make an end cap now. Thanks Grizz.
    you might suspect this whole series is to teach you how to make a bridge hammock Dutch.... .... seriously though I imagine most guys that have made bridge hammocks have had some unpleasant surprises with their first endcap attempts.

    Quote Originally Posted by Walking Bear View Post
    That end cap looks a lot better than my first one.
    Thanks for the info.
    no surprise, see above! My first one was off by at least an inch...

    Quote Originally Posted by Cranky Bear View Post
    Great stuff again Grizz, very interesting to see how one (close to mine) is made! Here's hoping this series of videos is still up when I figure out how to sew!
    Yep, this one is very very close in design to yours. Now at least you know where the various odd seams are coming from.

    Quote Originally Posted by AScott View Post
    Wow, this looks like quite an undertaking. Maybe I'll stick to a gather end for my first DIY hammock. I'm not sure I can wrap my mind around this without seeing one of these in person. Maybe someone will have one if I ever make it to one of the group hangs.
    Sometimes when I see a knot I don't know done on video I don't really "get it" without actually trying. Big picture-wise this endcap design is really simple. I went through many details because I've found that the ones I highlight matter overall to the tidiness of the end product. I suspect that someone trying this out for the first time, making reference to what I tried to explain would have a serious of "ah ha" moments as he got to a step, had a question about it, saw what the video said, and then got the point.

    Also there are easier ways to make endcaps, search on posts by hangnout. The main reason I went with this style on this hammock is that it is going to get a full zipped in bugnet. That means the bugnet gets attached directly to the end cap, that means the edge of the endcap between corners needs to be straight, that means you have to somehow deal with the arc length issue.
    If you did without a bugnet or did a cocoon wrap-around bugnet or hangnout's bugnet, you can a simpler design.
    Grizz
    (alias ProfessorHammock on youtube)

  8. #8
    Senior Member Old River Rat's Avatar
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    Are you creating a hammock, or, are you creating art? Amazing so far.

  9. #9
    silentorpheus's Avatar
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    When you get to the part where you're laying out the fabric to cut, you mention quickly in passing that the depth of the endcap is 17.5" - is this yet another of those figured out by trial and error measurements, or based on some data that you didn't discuss?

  10. #10
    GrizzlyAdams's Avatar
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    Quote Originally Posted by silentorpheus View Post
    When you get to the part where you're laying out the fabric to cut, you mention quickly in passing that the depth of the endcap is 17.5" - is this yet another of those figured out by trial and error measurements, or based on some data that you didn't discuss?
    good question! There is a method to that particular bit 'o madness.

    I know how wide the hammock body is going to be under the head spreader bar. I think of that width as the arc length of a parabola. I know how wide the spreader bar is. Imagine a graph where a parabola centered at (0,0) and opening up is super-imposed with a straight horizontal line y=H where H, the height of that line is unknown. The points where that line intersects the parabola are (-18,H) and (18,H). This reflects the interpretation that the horizontal line is the spreader bar, 36" wide.

    We also know that the arc-length of the parabola that arcs down from (-18,H) to (0,0) and then back up to (18,H) is the width of the hammock body, e.g., 54" inches. There is only one parabola that satisfies all these conditions, and once one computes its coefficient a for the form y = a*x^2
    you can figure out what H is.

    For the hammock widths in the general length I've been cutting, that H is in the neighborhood of 17.5 - 18.5 inches, depending.

    BTW, once I have the height H, this determines the width of the hammock at the foot..... I know the spreader bar distance, here 26" and I want the same height H for the endcap there, so from that I compute the coefficient of _that_ parabola (which is different) and from that compute the arc-length.

    you asked....
    Grizz
    (alias ProfessorHammock on youtube)

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