How to : 5 Intersecting Tetrahedra...

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How to : 5 Intersecting Tetrahedra...

Postby AFKAN » Tue May 24, 2011 10:13 am

Step 1. Create yourself a rather nice Dodecahedron.
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Step 2. To help it keep its shape, add some support.
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Step 3. Start poking the rods through creating a pyramid at a time inside the dodecahedron (make sure you use the main points not the support points)
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Step 4. Remove your outer dodecahedron and marvel at your genius 8-) :lol:
Image
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Re: How to : 5 Intersecting Tetrahedra...

Postby Peter Jepsen » Tue May 24, 2011 10:57 am

Yeah, this is so nice. I wish we could build it with the longer KIDS rods too..

Incidentally, the exterior support grid I use is the complete opposite of yours. Basically what is seen on your second photo minus what is seen on the first photo, then slightly inflated. AKA the Rhombic Triacontahedron. Ref. Golden Rhombus
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Re: How to : 5 Intersecting Tetrahedra...

Postby Remington » Tue Nov 21, 2017 2:48 pm

Image

That looks so cool. I can't figure out how to make it though.
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Re: How to : 5 Intersecting Tetrahedra...

Postby Tychi » Wed Dec 06, 2017 11:01 pm

I have to try it, thank(o:
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Re: How to : 5 Intersecting Tetrahedra...

Postby Tychi » Sun Dec 17, 2017 3:07 pm

Image
Thanks AFKAN, it's great..
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Re: How to : 5 Intersecting Tetrahedra...

Postby Eric » Thu Nov 19, 2020 11:25 am

It was a tough one!

I wasn't sure I would get to the end. I almost gave up halfway through the 2nd tetrahedron. I left it overnight and it went better this morning ;-)
You have to be very precise, well focused and accept that the junctions between the rods and the spheres are not good at the vertices of the tetrahedra as long as the outer supporting structure is present during the construction process.
I had to correct 4 or 5 edge-crossings at the very end to make it homogeneous.

I'm glad I didn't let go. Is it worth it!

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Building process... What a mess!!! Don't give up!

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Final result. View 1.

20201119_103709_2.jpg
Final result. View 2.
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Re: How to : 5 Intersecting Tetrahedra...

Postby AFKAN » Thu Nov 19, 2020 1:36 pm

That's fantastic Eric :-D

Yes I had many failed attempts at getting it right the first time :-)
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Re: How to : 5 Intersecting Tetrahedra...

Postby Eric » Tue Dec 29, 2020 1:45 pm

I finally got my hands on enough transparent orange rods (long quest on the second-hand market) :D :D :D

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Christmas star

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Tangle of rods and colors

20201229_123737.jpg
I'm proud of this one 8-)
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Re: How to : 5 Intersecting Tetrahedra...

Postby Eric » Mon Jan 18, 2021 8:22 pm

For those how didn't make the connection, it has been discussed a long time ago in this thread ;-)
Where you can find Amafirlian's alternate method of building using the Rhombic Triacontahedron as well as Peter's trick of using Rhombus panels.
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