PPRuNe Forums - View Single Post - AF 447 Thread No. 5
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Old 13th Aug 2011, 13:10
  #1997 (permalink)  
HeavyMetallist
 
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HarryMann:

Seems a naive viewpoint to me...
It's not naive at all. Plenty of aircraft have very unpleasant stall/departure/spin characteristics, which no-one in their right mind would want to explore outside a very carefully managed flight test environment. That isn't to say they can't be operated safely, just that their pilots need enough warning to be able to stay away from the stall in the first place.

I personally believe the instumentation is extremely poorly conceived... position error should be minimised 'by physical design' not using PE corrections (e.g. probes far fwd away from pressure field around wing or fuse, as in test fl;ight a/c).
Actually the engineers designing these aircraft aren't stupid, and go out of their way to position static sources where the inherent pressure error is at a minimum over the normal flight envelope of the aircraft - those probes and static plates aren't where they are for convenience. Sure you can do better with a massive probe on the nose or trailing a static cone from the fin (or presumably several for redundancy ), but why got to all that trouble and expense when you can get acceptable accuracy by applying corrections for AoA etc?
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