I need some help on the following problem:
Given that a curve $\mathbf r:I\to \Bbb R ^3$ has constant curvature $k(s)=k$, for all $s$, and constant torsion $\tau(s)=\tau$, for all $s$. Find the curve $\mathbf r$.
I only know that, according to the fundamental theorem, this curve exists and is unique. But, how practically find the parametric equation of the curve?