PPRuNe Forums - View Single Post - AF 447 Thread No. 9
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Old 9th August 2012 | 02:30
  #1150 (permalink)  
jcjeant
 
Joined: Aug 2009
Posts: 1,777
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From: Germany
OK, so let's look at it this way. As a pilot, do you want your aircraft to behave as it does more than 99.9(rec)% of the time if something goes wrong
No .. that I would not want that ..
The 99.9% is the behavior of the aircraft in flight which is operated by automatic systems , FBW and autopilot
The aircraft behave automatically .. that's is not of any help as experience when I must put my hand on the stick for fly it in another law than normal
When I have a problem (meaning that the flight management system is not more reliable at 100%) .. I'd rather manage myself (and with crew) and not have a hybrid system .. that can execute commands (eg trim auto) in my place
Hence the words many time hear when something go wrong:
It's my aircraft

PuraVidaTransport
So can someone explain why it takes so long to get control surfaces to give the actions requested by the pilot. As I see it, the pilot wanted the nose down for 17 seconds and got nothing more than 15 degree nose up then the other wanted FULL nose down for 7 seconds and the computers once again only gave him nose up elevator. Does this have something to do with the cumulative inputs? Can a set of bad inputs cause the airplane to not respond quickly as was needed in this case??
Go in direct law (full manual) .. and problem solved even with no elevators ( if you are enough quick to move manualy the trim )

Last edited by jcjeant; 9th August 2012 at 03:03.
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