"NY" wrote
>"Jan Panteltje"  wrote in message
>news:puri48$gf7$1@dont-email.me...
>> Also as to airspeed it should use at least 2 sensors and do arbitration
>> and disable itself and give a clear
>> warning to the pilots if an abnormal condition occurred.
>
>If you want to be sure, you need at least three sensors and a majority vote
>to determine, not that that there is an anomaly, but *which* sensor is
>anomalous and should be ignored. Error-correction as well as
>error-detection.

Yes, that is better, IIRC Concorde had 3 systems and arbitration.

Of course 2 sensors with vastly different values would also indicate something
is wrong.
Sometimes I think the software was written by some intern...

From the other links posted here Boeing does not seem to think very high
about pilot capabilities... "No need to tell them about the system,
too complicated for them'.

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