PPRuNe Forums - View Single Post - AF 447 Thread No. 9
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Old 18th July 2012 | 07:27
  #521 (permalink)  
rudderrudderrat
 
Joined: Oct 2009
Posts: 1,270
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From: UK
@ Clandestino,

Post #477
"From the CVR report:
02.06.54 the crew say "Minus forty-two we won’t use the anti ice that’s a plus."

There are very few TAT recordings reported.
However, please see the report published in July11, page 86.
Time 0hr.09min FL. 349.92 Static temperature (°C) -43.5
Time 2hr.10 FL 350.44 SAT -38.8"
by Clandestino
Originally Posted by rudderrudderrat
Time 0hr.09min FL. 34.992 Static temperature (°C) -43.5
Time 2hr.10 FL 35.044 SAT -38.8
(...)
The SAT has warmed from -42°C to -38.8°C over a very short time.
That "very short time" was two hours.
@ 02.06.54 the crew observe the SAT as -42°C
@ 02.10.00 (Interim report July11 page 86) SAT -38.8
By my maths, I make that 3 minutes and 6 seconds,
How do you make it two hours?

Edit.
However, from DFDR data it can be seen that aerodynamics were not enough to keep AF447 stalled; at about 2:11:45, THS is winding up and is 2-3 degrees shy of full nose up, elevators are fully nose up, as trust levers get retarded N1 goes down and nose drops from +15° to -10°.
The aircraft had 45° angle of attack.
Even if the nose was lowered by 25° I still make that 20° angle of attack.
Do you still think that that "aerodynamics were not enough to keep AF447 stalled"?

Last edited by rudderrudderrat; 18th July 2012 at 07:38.
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