PPRuNe Forums - View Single Post - AF 447 Thread No. 9
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Old 18th August 2012 | 04:13
  #1420 (permalink)  
CONF iture
 
Joined: Jan 2005
Posts: 1,916
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From: W of 30W
Originally Posted by studi
We are waiting for your well thought out explanation why autotrim OVERALL is such a bad feature to have after Clandestino very well showed how hard it is to deal on a conventional plane with stall situations.
Autotrim OVERALL bad feature ?
No – Quote me please.

Autotrim should withdraw in case of known dubious data ?
Absolutely.

The guys did not trim in the 737 when they should have – Fair enough – Pretty sure they have learned the lesson and everybody smart enough to read their adventure will have also.
But what I like is the unambiguous rule : If manual flight trim is on you (the PF).

To the contrary on the Airbus confusion is around (Airplane talking) :
  • If manual flight trim is on me
  • Sometimes I won’t trim for you but I will advise
  • But sometimes I may forget …
  • Or some other times I will trim when I should not
  • Or I won’t even if I should.

To my understanding one type of alternate law would not have trimmed further as the AoA reached a critical value, but the alternate law on which was AF447 just kept trimming … Go and figure ?

... how hard it is to deal on a conventional plane with stall situations
Perpignan and AF447 were not exactly conventional planes either …

CONF, you are becoming pathetic. Play the ball, not the man.
Play the ball, not the man ... what I think too.
The man fully deserves that little extra and don’t worry he’s very much able to take it, but pathetic I am ... you may be right.
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