I fully understand that the workings of the vario-associated AHRS-driven artificial horizon units are "always on". Just as a point of curiosity, I wonder how long it would take to get an accurate reading on this type of artificial horizon if you powered up the whole system from a cold start while engaged in a steep-banked turn.

No practical ramifications really, at least if the unit is for emergency use only-- system failure isn't a big concern in this context. I'm just curious.

Meanwhile, for those pilots flying with simpler instrumentation wanting something for purely emergency use, or for those pilots engaged in intentional cloud flying where there is a legitimate need for some sort of back-up system for redundancy, I still suggest-- consider the self-contained piezo-electric turn rate indicator I linked to on my first post.

S