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[edit] What is a double pendulum?

This article states that "a double pendulum is a pendulum with another pendulum attached to its end", with link to pendulum. Looking at "pendulum", I see that it consists of two masses connected by two massless rods. Here, however, pendulum consists of two massive rods. I think, by double pendulum, people usually think about the case with two massless rods and two masses, see most of the references given at the end of the article. Understanding that this case might also be called double pendulum, not even mentioning the more usual meaning is not satisfactory.

Cumi 13:41, 24 March 2006 (UTC)

[edit] chaos

wiki readers:

What units are used for angles < θ1, θ2; CHAOTIC MOTION, Double pendulum >

in the x-y graph where: x axis: angle θ1 is plotted for -3 to +3 (left to right) y axis: angle θ2 is plotted for -3 to +3 (top to bottom)

the graph is described as: < Graph of the time for the pendulum to flip over as a < function of initial conditions

thanks for the information!

veritus 16:15, 24 February 2007 (UTC)