Hello. Been wondering if there's a code that could allow spinning rotors to stop in the same degree/position as their first state (tried doing it simply with activation group, resulted in rotors violently spinning back in place)

Not planning on building anything soon but I just want to know because I've been wanting to build stopped rotor-wings for a long while (if you don't know, stopped rotor-wings use their wings as helicopter blades for VTOL).