Here is another version of torsional wave (demostration)

Change the c[i] angle with slider and watch how wave propagate.
The slider for i can be used to change angle for i-th element.

The force acting on each element is
F_i= K* c_i + K_ij * (c_{i+1}-c_i)+K_ij (c_i-c_{i-1})-b*\omega_i
where c_i is the i-th angle, \omega_i is the angular velocity, b is damping constant, K_ij represent interaction between elements.

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