|Through the lens of Abir Ghattas|
My first interest in chaotic behavior can be traced back to this post. This time however, instead of simply developing a simulator I decided to build a real double pendulum. Watching a double pendulum dance erratically was worth a million simulation. If you are follower of this blog you will realize instantly that I could never let this opportunity pass without transforming it into some sort of a crazy experiment (-mostly photographic-).
The first step in the process was the design of the pendulum. The dimensions were chosen such as to maximize the chaotic behavior. Click here to download the AutoCAD .dwg file.
|All dimensions are in cm|
The material was chosen to be transparent 2mm thick plexiglass (4mm would have been ideal-but it was not available). The reason I chose to use a transparent material was so that the light can pass through in photography. I would definitely choose another material if I was using the pendulum for decorative purposes.
As for the components needed:
- 6mm ball bearings x4
- 6mm Hex Screw with nuts and washers x2
- 3mm wall mounting screws and screw anchors x2
The following slideshow displays the assembly process
Here's a video of the double pendulum in action
After the assembly, Abir Ghattas and Patrick Abi Salloum came over for the photoshoot. We used LEDs of different colors connected to 3V coin batteries and we took long exposure pictures in the dark.
|Left to Right: (1) Abir painting the pictures with LEDs (2)focusing (3) Patrick vs. Abu Ali|
|Courtesy of Patrick Abi Salloum|
|"Angel of Death" courtesy of Patrick Abi Salloum|
and Patrick's flickr: http://www.flickr.com/photos/patrickas/7072749767/in/photostream