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  1. #51
    Senior Member jeff-oh's Avatar
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    Thanks, the end fixity factor is based on a pin-pin connection for the bolted version and a pin-Free for the tied version. At least that is my assumption.
    Last edited by jeff-oh; 09-12-2018 at 06:33.

  2. #52
    New Member FuzzyJew's Avatar
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    Awesome. Thank you very much!
    "If people never did silly things nothing intelligent would ever get done." - L Wittgenstein

  3. #53
    Member
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    Quote Originally Posted by jeff-oh View Post
    72 Width of Base on ground:
    120 Distance between the apexes when set up:
    96 Length of pole from ground to attachment point:
    =DEGREES(ACOS(0.5*A2/A4)) ---Splay angle (68.0)
    =A4*SIN(RADIANS(A5)) --- Projected Pole Height (89.0)
    =DEGREES(ACOS(0.5*A3/A6)) --- Pole angle (47.6)
    Forgive me if my math or trig is off, I am merely an actuary and not an engineer. But with the above (6' baseline, 10' ridgeline, 8' poles), I compute:

    Distance from the midpoint of the 6' baseline to the apex: sqrt(8^2 - 3^2)=7.416
    Height of the apexes above the ground: sqrt(7.416^2 - 5^2)=5.477 ft, or 65.7 inches; quite different than your 89 above.

    One of us has committed a trig error, probably me, please clarify? Thanks

  4. #54
    Senior Member jeff-oh's Avatar
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    Quote Originally Posted by CaptainGravity View Post
    Forgive me if my math or trig is off, I am merely an actuary and not an engineer. But with the above (6' baseline, 10' ridgeline, 8' poles), I compute:

    Distance from the midpoint of the 6' baseline to the apex: sqrt(8^2 - 3^2)=7.416
    Height of the apexes above the ground: sqrt(7.416^2 - 5^2)=5.477 ft, or 65.7 inches; quite different than your 89 above.

    One of us has committed a trig error, probably me, please clarify? Thanks
    We're both right. Title of my calculation is bad and mis-leading. (went back and corrected, thank you) I am actually calculating the hypotenuse of the side view triangle. i.e. 7.416*12 = 89". I then calculate the side view ground angle: Inverse Cosine (Ground Length/Hyp) or cos ^-1(5/7.416)= 47.6 deg. and thus agree the true "Projected Vertical length" is really: 89 * Sin (47.6) = 65.7" or 5.477 ft.

    You, through the easier, and probably more direct... Pythagorean theorem, directly solve the lengths of the side view triangle. and thus... the angle is again confirmed Inverse Tangent of (Opposite/Adjacent) or Tan^-1 (5.477/5) = 47.6 deg. nicely done.


    CYOM Huh??? Calculate your own method. Defiantly multiple ways to skin this cat.
    Last edited by jeff-oh; 09-12-2018 at 14:46.

  5. #55
    Senior Member Rat's Avatar
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    Well, I'm no mathmagician like y'all, but I built a tensahedron stand today.

    115" between the holes, 120" oal, works like a champ!

    I used soft copper tube to make the grommets/eyelets, I just peened it down.

    Thanks for all the hard work on this, it works great! I'm standing on the shoulders of giants...



    Sent from my SM-G930P using Tapatalk
    "I aim to misbehave." - Capt. Mal Reynolds
    Mind of a Rat Youtube Channel

  6. #56

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    Quote Originally Posted by Rat View Post
    I used soft copper tube to make the grommets/eyelets, I just peened it down.
    This is brilliant...

    Thanks for sharing.

    Sent from my SM-N920V using Tapatalk

  7. #57

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    I love those artisanal grommets! And that length allows such a non-taco-threatening lay with almost your entire body headward of the baseline.
    --
    Tensa Outdoor, LLC, maker of the Tensa4 tensahedron hammock stand, and the Tensa Solo ultralight flavor too.
    http://tensaoutdoor.com/

  8. #58
    Senior Member Rat's Avatar
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    Quote Originally Posted by Latherdome View Post
    I love those artisanal grommets! And that length allows such a non-taco-threatening lay with almost your entire body headward of the baseline.
    I made it big for the tarp, but yeah, it works for a really comfy lay with the hammock almost perfectly level. Its huge, but I have a truck, so no worries.

    Artisanal, that's funny, malleable and easily sourced is more like it!

    We will be using them at fair this year, way less set up time than my old tensegrity stand; but it was a helluva conversation starter!

    Sent from my SM-G930P using Tapatalk
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  9. #59

    Join Date
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    Quote Originally Posted by Rat View Post
    Well, I'm no mathmagician like y'all, but I built a tensahedron stand today.

    115" between the holes, 120" oal, works like a champ!

    I used soft copper tube to make the grommets/eyelets, I just peened it down.

    Thanks for all the hard work on this, it works great! I'm standing on the shoulders of giants...

    Sent from my SM-G930P using Tapatalk
    Great work, Rat!
    Enjoying my fall into the rabbit hole...

  10. #60
    Sweet copper fix!!

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