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  1. #11
    Senior Member Badchef's Avatar
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    I like it! Once I plugged some numbers in, it started to talk to me and made sense.
    There are very few problems we can solve ourselves, but there is almost nothing we cannot solve together.

    Most often when someone says they can't, they are unwilling to try.

  2. #12
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    I changed the simulation; hopefully to make it easier to use. Now you choose your tarp dimensions with the slider bars. If you don't like it this way, you can still edit cells B2, B3, B4, and B5 directly.

  3. #13

    Pattern maker

    OK guys using fire fox opened Geogebra tube and get steps 1-6 , and a big open rectangle below that with nothing in it ???
    Am I missing something?

    Thanks
    Mike

  4. #14
    Senior Member angrysparrow's Avatar
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    Quote Originally Posted by cc flash View Post
    OK guys using fire fox opened Geogebra tube and get steps 1-6 , and a big open rectangle below that with nothing in it ???
    Am I missing something?
    Yes. Java Runtime.
    “I think that when the lies are all told and forgot the truth will be there yet. It dont move about from place to place and it dont change from time to time. You cant corrupt it any more than you can salt salt.” - Cormac McCarthy

  5. #15
    Senior Member ZMad2000's Avatar
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    Great program. Took a little time to figure it out but i am going to use it for the next tarp i make.

  6. #16
    Senior Member Knotty's Avatar
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    Going to play with this a bit to see how it works. Looks very promising. Thanks!
    Knotty
    "Don't speak unless it improves the silence." -proverb
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  7. #17
    Senior Member Badchef's Avatar
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    Ok, if I read the calculator right I get the following:

    A hex tarp with a 144" ridgeline and 120" sides and will require 244.5" of fabric. And I can make two out of 14.5 yds of fabric (522").

    Yes, they will be huge but they are hopefully going to cover two hammocks, right????
    There are very few problems we can solve ourselves, but there is almost nothing we cannot solve together.

    Most often when someone says they can't, they are unwilling to try.

  8. #18
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    Wow, that's big. A few comments:

    How wide is the fabric you're using? If I use 54 inch fabric, I get 249 inches of length per tarp.

    244.5 * 2 = 489. Why do you need 522 inches?

    Keep in mind that by overlapping the patters, you could do with even less fabric. Visualize what 489 inches of fabric would look like with the two tarp patterns on it. There's a lot of empty space between the two. If you overlay seam JD of the first tarp with seam AG for the second tarp, you can shorten the fabric length by the length of segment MG.

    You can find the length of segment MG by using the distance tool (under the angle tool).

  9. #19
    Senior Member Badchef's Avatar
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    Quote Originally Posted by equiquay View Post
    Wow, that's big. A few comments:

    How wide is the fabric you're using? If I use 54 inch fabric, I get 249 inches of length per tarp.

    244.5 * 2 = 489. Why do you need 522 inches?

    You can find the length of segment MG by using the distance tool (under the angle tool).
    Got it! I have available 522 inches. MG = 45 The fabric is 60" wide

    I plan to use a total of 444 for the two tarps. (244.5 *2)-45 = 444

    So it all will work out, AND I will have about 6 feet left over.
    There are very few problems we can solve ourselves, but there is almost nothing we cannot solve together.

    Most often when someone says they can't, they are unwilling to try.

  10. #20
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    Hmm, something is still a little off for me. When I use tarpwidth=108, tarplength=108, ridgeline=144, fabwidth=60, I get a total fabric length of 236.12, and MG = 53.67. How large is your seam?

    Maybe you found a bug somewhere. I'll keep trying to duplicate your results. If you don't mind, restart the simulation and see if you get the same results a second time.

    Edit: Oops! Nevermind! I had my dimensions wrong. I see you're using 120 inch sides, not 108. My results match yours now. That's a big tarp you're making!

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