1ArmedScissor

Those side elements might not help, but even without them it always starts to lose stability. What I haven't tried is a setup where most of the weight is outside on the rotating "ring". Not knowing much about physics, it felt more natural to leave the weight in the middle for stability (and cheaper to accelerate and decelerate into rotation I assumed). Thanks for all your help so far though, much appreciated! Do you have any good examples for fully rotating stations?

Hi, I've built a station that is meant to rotate around one axis. To my understanding, once that rotation is achieved, sas is turned off and no other thrust is applied, the station should continue to rotate along that axis. However, in 100k orbit around Kerbin, the station starts tilting once i stop accelerating the rotation. Any clues what I might be missing? Persistent Rotation will work for a while, but can lead to very sudden unprovoked shifts in the axis. I have tried removing different parts. The only thing I can get to rotate without instability is a single-file rocket.