In this experiment, an icicle is grown from a rotating support over a period of about 10 hours. The support rotates every 4 minutes. Tap water and gently stirred surrounding air were used. The icicle forms a non-ideal non-self-similar shape and exhibits a lot of ripples.
Here are 3 more movies of growing icicles a rotating icicle with multiple tips, a ripply ice finger and a nearly self-similar rotating icicle.
See Icicle morphology for a publications about these experiments.