Nr-Decrease, same with the EC 155
Hi Jab,
same principle with the EC 155 - you pull the pitch to reduce the Nr down to 330 rpm - from abot 350 in normal flight.
Aural warning should be on and off - then it is abou right....
I think, it is not only to get the most out of the rotor, it is also, to get the most out of the remaining engine.
If the Nr is decreasing, the remaining engine is at its peak power - which you need, to get away from the hazards - or to have the slowest run on speed.
With the FADEC in the EC 155 you have certain modes - so after initial recovery you can select continious OEI power - and drooping Nr to 330 means, that you use all the CT you have available.
For landing you then select high - which is time limited.
Greetings Flying Bull