double pendulum (various lengths)

Watch the video first and enjoy.... https://youtu.be/rK5wfl6OZg8

This is a double pendulum constructed with the simplest possible materials.
The double pendulum is often used as a model of chaos, but it's also interesting to watch　
unexpected behavior.

I also made a base (base.stl) so that you can attach this thing to the edge of desk or something with clamps or screws.

The force that the base receives from the pendulum is greater than expected, and the base must counter this. Therefore, in order for the pendulum to move for a long time, it is important to fix the base to something as heavy and solid as possible.



[size]
I have prepared 5 different lengths of bars, so print your favorite 2 lengths of bars.
You can enjoy the fun of double pendulum movement even with the combination of the two smallest bars.
bar_175 : 200 x 30 x 7 mm (axis to axis =170mm)
bar_135 : 165 x 30 x 7 mm (axis to axis =135mm)
bar_100 : 130 x 30 x 7 mm (axis to axis =100mm)
bar_65 :