Draft 3d design - Triple Pendulum

in digital-design •  10 months ago

If you want to watch chaotic movements in its full beauty than there is no better way than to look at the movements of a (double) Pendulum. Since I saw the Pendulum in the Science Museum NEMO in Amsterdam I am fascinated by the unpredictable movements it shows and it was clear to me that I have to build one for myself!

Draft design of the triple pendulum I am working on
Pendulum tarekadam.gif

In this post I will show you the design process in Fusion360 and the required parts needed to build one yourself. Lets start however with a brief explanation on what a triple pendulum is. Using help from wikipedia, a pendulum is a weight suspended from a pivot so that it can swing freely.

Image source Wikipedia

If you attach multiple pivot points to each other and let them freely move around, you can watch chaotic movements which can be predicted for a while but than become random. The following image shows the chaotic movement which is fascinating to watch. It is getting even more impressive if you attach LED's to the end of the pendulum and make long exposure pictures.

Image source Wikipedia

If you want to read more about pendulum in general and chaotic movements than wikipedia is an excellent source. Back to my design in Fusion 360. The first thing I did was to measure 3 30cm long plastic parts that will act as the pendulum. Each of the parts will host a ceramic bearing (22 x 7 mm) to make the rotation as frictionless as possible. I have still two ceramic from my Fidget Spinner but had to order four more today from AliExpress. If you like to build a triple pendulum yourself than I suggest to use ceramic or good rotating skateboard bearings as well.

Screen Shot 2018-01-10 at 21.54.35.png

The plan is to mount the triple pendulum to the wall in my office, I will use a 8MM rod and cover the rod with a simple plastic lid.
Once the bearings arrive I will connect the three parts with 8mm bolts and nuts. That's it, the design itself is not very complicated. So to summarise, items you need.

  • 3 plastic parts that acts as Pendulum (I will upload the parts to Thingiverse for free download once project is done.)
  • 5 Skateboard (ceramic) bearings.
  • 3 8mm bols
  • 3 8mm nuts
  • 6 little plastic washer to add some spacing


If you want to see the final triple pendulum in action on my wall than stay tuned. I will provide an update once I have all the parts.

Do you like the idea or have any suggestions to improve it? Let me know in the comments.

All the best!


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Great! Always nice to see a #diy .

Hey, i like how you play with your tools. I've been trying to learn to make a design or anything using Ps and Ai but yeah it's not easy haha i've wen watching a lot of videos on youtube to learn more and now i'm glad that i am better than yesterday.


Thank you, I am glad you like it. I also learned most by watching YouTube videos and reading through forums. Looking forward to see some designs from you.

Wow! Cool and smart idea! It is definitely something new and different from all the ordinary things you usually think of when modeling or prototyping. I am looking forward to reading your updates, well done!


Thank you very much. I can't wait to complete this on as well and show pictures of the assembled design.

for you @tarekadam

Hi @tarekadam
you are very good at making this dimension,
I also want to learn from someone,
but he has not had time to teach me, because busy

Your design looks, has the same expertise.
with different designs.
I really like your design.
I came just, want to say ...

thank you for making me want to try it.

regards @sultan-aceh


Thank you for your comment. Yes give it a try.


ok and thank very much @tarekadam

if You would want chaos in 1 dimension, 3 steps.
1 You can use operational amplifiers in a special electric circiut to simulate a differential equation (second order).
2 you can couple two such circuits in a special way to get coupled differential equations (second order).
3 you can couple three such circuits in a special way to get coupled differential equations (second order).

You can use an analogue plotter in a special way, to draw the voltage changes w.r.t. time axis .
step 1 yields a nice sinus curve
step 2 yields overlapping frequency fluctuation - beat
step 3 and further yields chaos
we did these experiments long time ago.

You are incredible, this is a great job!


Thank you very much!

Great post & creative thanks for sharing @tarekadam


I am happy you like it.

Wow you are a genius great calculations done on that it was not easy


Thank you but I just took the explanation from Wikipedia, not my calculation :-)

nice post good work


Thank you.

I have never seen anything like this before. A nerd like me may need something like that. The purple turtle would, too.


Yes, it is a nice conversation started for sure.

Wow! This is awesome... i think i can now try one for myself

That gif made it more interesting to know how it will turn out wow :)

this may look simple to some people but it not wow something outstanding you are trying to do

that creativity is really good i like it so much......

@tarekadam thank sir Such a great article & nice photography

Really cool.

great post my friend♥♥♥


Thank you.

the working model of it would be mind blowing wow bro great work :)


Thank you very much!