I've checked that (source is a text written by physicist Hans-Peter Dürr, who worked with Werner Heisenberg in the past), a real double or triple pendulum is fr

I've checked that (source is a text written by physicist Hans-Peter Dürr, who worked with Werner Heisenberg in the past), a real double or triple pendulum is from time to time chaotic and uncalculable (if started with strong impulse).