AF 447 Thread No. 10

[rudderrudderrat]

Hi HN39,

I agree it doesn't match very well. Some of the graphs seem to have slipped by almost 5 seconds.

If we assume the graphs have not been superimposed correctly, and that the greatest illusion of pitch was caused during the fastest acceleration, then between 19:40:42 and 19:40:47 the speed increased from 200 to 240kts. i.e. 40 kts in 5 secs or 8kts per second (0.41g)
ArcTAN 0.41/1 = about +22 degs GIA

When the real pitch and perceived pitch matched at 13 degs (shown as 5 seconds before the start of the acceleration), then the Somatogravic illusion of + 22 degs would make the perceived attitude as 35 degs.