PPRuNe Forums - View Single Post - AF447 Thread No. 3
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Old 15th Jun 2011, 13:38
  #2043 (permalink)  
syseng68k
 
Join Date: Jun 2009
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One particularly prescient poster, or an industry doomed to repeat history until it learns from it ?
Another quote from Collinson:

"The high integrity, full authority FBW can provide the automatic
stabilisation required to enable a civil aircraft to be designed
with reduced stability margins under certain loading configurations
and flight conditions. This enables a lighter aircraft to be produced
with an increased performance and payload capability compared with a
conventional design".

Weasel words. Saying that stability can be traded against cost and
performance, but are current designs going too far in this respect ?.

Note: "reduced stability requirements". This implies that when
the systems gives up, the aircraft will be more difficult to control
manually, than a non fbw aircraft. I think someone already mentioned
elsewhere that the a/c would be very sensitive to control inputs. Just
what's needed when confronted with an emergency situation with ambiguous
or unreliable data from the flight control systems and a crew with no
training or experience of such conditions.

On balance, correct me if wrong, once AF447 stalled, only a test pilot
with a lot of experience would have had any chance of recovery...
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