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Old 13th Apr 2011, 18:58
  #3435 (permalink)  
Lonewolf_50
 
Join Date: Aug 2009
Location: Texas
Age: 64
Posts: 7,228
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Lonewolf_50;

The purpose of my post was to dispel a few popular misperceptions about stalling. As to what did happen, I adopt PJ2's wise words that we simply have to wait for CVR and DFDR to tell us.

*tips cap*

As to your first question: "Could stall buffet be mistaken for turbulence associated with a CB?", the stall buffet is preceded (in alternate law) by stall warning, a synthesized voice calling "STALL, STALL, STALL" that continues until the AoA is reduced below that at which it starts.
Understood. If AoA detection/measurement is compromised (as it appears airspeed was was compromised) ... I'd need to understand the AoA system in the A330 before asking further questions on that. I'll see if I can find something on that.
I have no personal experience with stall buffet, but believe that it is unmistakably different from "turbulence associated with a CB".
My experience with stalls is from small aircraft, not heavies. Even when dealing with accelerated stall (happened twice, me not at controls) it does feel different from moderate clear air turbulence ... and as I avoided CB/thunderstorms like the plague, I've no "feel" for how that feels. Thunderstorm penetration wasn't an option.
I am aware that the training syllabus of airline pilots does not expose them to anything beyond stall warning (simulators are not representative in that regime), but would expect that an experienced pilot is familiar with the turbulence encountered in CB's.
Roger.
I do not have the quantitative data that you ask for in the remainder of your post. Some very rough estimates have been made many pages back in this thread.
As above, I went back to an older thread where you cited "Flying the big jets" and am happy with the "9000-14000 fpm RoD" for a heavy. It at least puts a boundary on my question, which is good enough.

Thanks.
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