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The HeadTo achieve the desired neck curl, I used a car antenna motor to pull the neck down, but the motion back up was problematic. The neck would uncurl ungracefully. A swan lifts it's head from the base of the neck on up. To get that motion I used a length of a carbon fiber fishing rod and mounted it along the back of the neck. Because of the fishing rods taper, it acted as a proportional spring - the thicker part, in the base of the neck, straightened out first - from the bottom up. |