Questions tagged [redundancy]

For questions about the use of multiple similar components to keep a single failure from being catastrophic.

Filter by
Sorted by
Tagged with
15
votes
2answers
2k views

Why is not every airplane equipped with 3 angle-of-attack sensors?

For critical systems, redundancy is built into the system. It is common knowledge among designers/architects to have three different inputs so in case one is faulty, input from the remaining two can ...
1
vote
2answers
211 views

Why don't aircraft carriers have multiple sets of arresting wires?

On this answer to this question regarding the merits of angled flightdecks on aircraft carriers, @JanHudec makes this interesting observation: You don't really have "two flight decks". The ...
0
votes
1answer
165 views

Why does the DHC-6 have only one set of elevator cables?

Air Moorea Flight 1121 crashed because its up-elevator cable broke, allowing the elevator to blow to its faired position and thus be unavailable to counteract the pitch-down moment caused by the flaps ...
3
votes
3answers
212 views

Can horizontal stabilizer trim be worked independently (each side)?

I notice most jetliners have a big trim wheel on each side of the center console. This wheel is black with white stripes, and notably turns on its own via the autopilot. Two large trim wheels: And ...
6
votes
1answer
1k views

What is the difference between redundancy and fault tolerance?

What is the difference between redundancy and fault tolerance in the context of aviation ?
48
votes
3answers
9k views

How dissimilar are redundant flight control computers?

On Airbus aircraft there are computers to secure the flight envelope, or to move the control surfaces. FADECs totally control the engines. Computers take decisions in place of the pilots, or even ...
12
votes
5answers
3k views

What alternative methods are there for controlling a plane when flight control surfaces have failed?

I saw a TV show once about Japan Airlines flight 123, in which the aft pressure bulkhead ruptured, disabling hydraulics and ripping off the vertical stabiliser. So the flight crashed after some time ...