Spuu-52/Adjustable stops?

[Czechnology]

I was wondering, what does this system actually do? All I know about it is to flip the switch to on as part of my cold start procedure, but with no complete manual I have no idea

[molevitch]

Same as in Mi-8.

”Right pedal movement is limited by СПУУ-52-1 (SPUU-52-1) moveable stop (pitch limiter) system which uses air density and temperature to adjust the maximum tail rotor pitch angle and prevent overloading of the tail rotor and drive system.”