Helicoid Full Twist
thingiverse
This is a model of part of a helicoid with parametric equations x(t)=cos(t), y(t)=sin(t), and z(t) = 2t/3, where the parameter u ranges from -1 to 1. The parameter t ranges from 0 to 2Pi. Additional information can be found at http://mathvis.academic.wlu.edu/2015/07/27/helicoids/.
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