spiral on sphere...

 From:  Michael Gibson
4084.2 In reply to 4084.1 
Hi Rainer re: spiral on a sphere - if you can draw a curve that is close to what you want, you can then sweep a line along it to get a kind of ribbon like surface and then intersect that with the sphere to get your final curve.

Check out Danny's post in this previous thread for that kind of method:

But it may be kind of difficult to get the path shaped well in the pole areas.

- Michael