Chaotic Pendulum

A double pendulum is a simple mechanical device which exhibits chaotic motion. The double pendulum is particularly interesting because compared with many other chaotic systems (like the weather) it is extremely simple. A double pendulum is made up from two arms which are connected to each other. The first arm or pendulum is connected to the wall or a solid structure through a bearing set and the second arm or pendulum is connected to the first one through another bearing set. When you spin this system the arms rotate exhibiting chaotic motion. A chaotic pendulum is truly fascinating to watch.

Depending on how hard you spin it will keep going for approximately 30-45 seconds. Special attention has been given to ensuring that friction is reduced as much as possible.

The chaotic pendulums are easy to install. All you need is a Philips screwdriver and a suitable solid wall to attach it to with the three supplied screws. It should take about 5 minutes to do it properly. Universities often find the alternative direct mounting option useful. To direct mount into a steel beam an additional bolt and spacer is supplied. Drill and tap an M6x8mm hole into the steel beam or structure and attach the pendulum directly to the steel beam using the supplied hex tool.