Suppose I was driving a car on a solid sphere of radius $R$ at a constant speed. I constantly take a left turn always at the same angle. If the sphere was flat — flat Earth? :) — I would drive in circles of radius $T$.
How does my trajectory on the sphere look like?
When will my path be periodic?
If the path is not periodic, is it space-filling or will there be regions I will never get close to?
Will I visit certain places more often?
How many self-intersections will my trajectory make and where will they be?
Will my self-intersections be at all kinds of angles or a only at a few?
Is the trajectory chaotic when it is not periodic?
Is there a closed form?
If you mean to say that the path the car takes has the same curvature at every point, then of course the car travels in a (small) circle. I don’t see any other way of interpreting your word “always”.