Originally Posted by
Grenville Fortescue
Based on awblain's explanation,
rapid loss of Nr is possible if power is absent meaning that in order to achieve the AAIB's initial findings of a high speed impact with nil apparent Nr we are looking at a total power failure followed by sustained pitch on the main rotor?
Probably yes. I have difficulties conceiving many other ways to end up with a fully stalled rotor and thus close to 0 RRPM on impact