...if you are down to 85% MRrpm and you are NOT in an autorotation and trying to stretch your glide - you are seriously in deep!!
....you are WAY overpitched and no matter the type of powerplant, unless you nearly floor the collective, rpm recovery will NOT be fast, piston or turbine.
[IF you unload the rotor, piston or turbine will recover fast!]
IF you get to 85% under power, it means you asked for more than the powerplant CAN give you, so it is long past (...or actually BELOW) torque levels it can sustain or recover from (without substantially lowering the collective)....
3top
