PPRuNe Forums - View Single Post - AF 447 Thread No. 9
View Single Post
Old 8th Aug 2012, 20:53
  #1136 (permalink)  
DozyWannabe
 
Join Date: Jul 2002
Location: UK
Posts: 3,093
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by jcjeant
piloting in manual (pitch matter) is using the stick and the trim (the pilot is using both hands)
In more traditional designs this is the de facto state of affairs, but this design is different.

Not with Airbus ...
The pilot does not control the trim .. and this one continues to act as in normal law .. but then it is no longer active protection ....
The pilot controls the trim via the sidestick, just as in Normal Law - presence or lack of protections dont' come into it.

To me this is a bad design .. the pilot don't control (full manual control) entirely the pitch ...
An opinion to which you are welcome, but looking at it from an engineering point of view, does it not make more sense to have the aircraft behave as close as it can to how it behaves when not in a degraded state?

In alternate law the auto trim is not a help ... instead it's like throw a lead buoy at somebody drowning
Not at all - it behaves as it does in Normal Law, which makes sense - the loss of hard protections is a moot point. You can't blame the design for the fact that at least one member of the crew consistently applied inappropriate inputs.
DozyWannabe is offline