Originally posted by Machinbird in #540:
Once the ADIRU outputs are disqualified, the velocity vector information they provide is removed and the aircraft systems have to make do with what is left (which isn't much).
Originally posted by PJ2 in #541:
The question and argument here I think is, what does AoA offer that CAS does not.
A related question could be what AoA offers when CAS is not available. If you’ll forgive my idle curiosity in the face of the serious matters you’re discussing, why doesn’t the IRU use inertial vertical speed to calculate FPV, rather than the barometric vertical speed it doesn’t get from an ‘invalid’ ADR?
regards,
HN39