Double Pendulum Chaos Light Writing (computer simulation) 1

Double pendulum comprising two rigid linkages of negligible mass with point masses attached to the ends of the linkages, confined to two dimensional rotational motion about their joints without any dissipation. Here the double pendulum is held at 90 degrees and then released. Initially the motion appears regular, but chaos soon sets in, with the end point of the pendulum eventually covering the whole space available to it for a given starting energy. The double pendulum is a wonderful example of ho