Many thanks nodrama for your effort!
I understand this system is a classic follow-up mechanism.
eee... I am still confused a bit. Would that mean that control shaft itself is actually a hydraulic piston with attachments on both sides?? It means when it started rotating O rings/packings/seals became runners for fast spinning control shaft??? I really wonder how this control shaft looks like when it`s put on the table...
ShyTorque my slight uneasiness on this design feature is with pun intended... I agree with you totally.
Hovewer, there are many many individual parts in each helicopter, that will make it stop flying immediatelly in case of failure/breakage. For instance, there are over 40 bolts in Bell 412 flight control system that are replaced every 1000 hours, b`couse - any of these breaks - bye, bye.... plus many other things. Truly, these are simple items and thus very reliable, (until someone fails to put in a cotter pin. and no one notices...) A failed bearing is another story and is not so uncommon.
hoistop