Jack stall or servo transparency ...... they were actually also contributing factors of the Zuckerman Effect if I recall properly.
This is scary. And now I can't stop that song AC.....
One last crack at it..... The rigidity of a system is a fundamental pre-requisite for rotating bodies that exhibit gyroscopic principles. Conventional helicopter rotor systems are not rigid systems, they are individual wings moving individually, flapping, feather and lead lagging individually and do not form a disk.
I know that the powerful pull of the Zuckerman Effect will inevitably outweigh this principle, and many others besides.
".....Well I don't know if all that's true
'Cause you got me, and baby I got you...."