Generalized Helix
The geodesics on a general cylinder generated by lines parallel to a line l with which the tangent makes a constant angle.
See also
HelixExplore with Wolfram|Alpha
WolframAlpha
More things to try:
Cite this as:
Weisstein, Eric W. "Generalized Helix." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/GeneralizedHelix.html