PPRuNe Forums - View Single Post - AF 447 Thread No. 5
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Old 14th Jul 2011, 11:13
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RetiredF4
 
Join Date: Jun 2009
Location: Germany
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HazelNuts39

RetiredF4;
Please have a look at Figure6, originally linked by
zumBeispiel and tell me what is so different about the A330?
i dont know, but there should be data available which represent exactly the aircraft we are talking about and not any kind of airfoil to answer the question, how AF447 could get into this high AOA regime and how it could maintain it.

By the way, note the text associated with Figure 6 of your reference:

The pitch control remains effective throughout the angle of attack range but diminishes with increasing angle of attack, due initially to the immersion of the horizontal tail in the wing wake and ultimately due to flow separation on the horizontal tail itself at post- and deep-stall angles of attack. The maximum steady angle of attack with full nose-up elevator deflection is at α≈25˚, which is significantly higher than the stall region near α≈12˚ and this result indicates the potential for the airplane to enter upset conditions using normal pilot controls during un-accelerated flight.
There seem to be lot of differences, AF447 kept more then double the AOA on the way down.
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