Does MoI have an elliptical helix script?
Or Ovoid helix script?
Or Node?

https://math.stackexchange.com/questions/2952936/parametric-equations-of-an-ellipsoidal-helix

Should be relatively easy to do a script, or a node...

- Brian

Is the "pitch" constant?

There is a Canted Helix script...
And an Elliptical Helix script.
From 11 years ago... (They were posted on the forum, do a Search)