PPRuNe Forums - View Single Post - AF 447 Thread No. 9
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Old 10th July 2012 | 15:24
  #209 (permalink)  
rudderrudderrat
 
Joined: Oct 2009
Posts: 1,270
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From: UK
Hi DozyWannabe,

Sorry - I must be a bit dozy. I still don't understand.
The stall warning is triggered when measured Alpha exceeds some threshold. Alpha > X. The vanes are unreliable in airflow less than 60 kts. Therfore:
1) Inhibit when IAS <60 kts = No good for AF 447 scenarios.
2) Only Inhibit IF IAS <60 kts AND WoW, else Shout when Alpha > X

Why would 2) make a false stall warning on climb out more likely?

Last edited by rudderrudderrat; 10th July 2012 at 15:34. Reason: IF instead of when
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