ISIS - essentially for the last week or so I have been trying to establish whether the poor souls would have ANY attitude reference left with all the 'failures' - with little success! WITHOUT structural breakup, they would have a fighting (but difficult) chance using standby attitude and power (let's assume the standby speed is knackered too). Without an independent attitude.................. I'm very much with aguadalte #1507 on this.
Backtracking a bit
Picking up on the ISIS:
A33Zab (#1518 ish) - Thanks - full freedom in pitch and roll.
captainflame IT ALSO GET'S INFO from ADIRUs 1 and 3 ! (#1523 ish) - 'how much and what' could be significant with those 2 down! Not quite a 'standby'?
Mad FS So if you were to have some kind of catastrophic design flaw that took out every ADM the ISIS should still be running. I don't think the air data system designers are as clueless as you seem to think. (#1527 ish) and The backup - ISIS - is dissimilar. (#1535 ish) - as barrymung says - you have to wonder? Dissimilar but with common inputs?