Ostatnie sekundy w raporcie PKBWL. CVR.

31.08.13, 00:50
Analiza
    • niegracz Re: Ostatnie sekundy w raporcie PKBWL. CVR. 01.09.13, 18:36
      tu wątpliwości co do zapisów z forum jet
      What is also interesting is that the plane, while gaining altitude and rotating to 50 deg, flies perfectly straight between points 5B and TAWS #38.

      The rotation gets even crazier when I examine more points from the Table on page 4/14. The rotation speed gets up to 112 deg/sec only to stop abruptly for about 0.5 sec.

      forums.jetphotos.net/archive/index.php/t-50144-p-7.html
      This shows the plane's horizontal path based on TAWS events. The trees, MM, and all events are per geo coordinates. The best match for the ABCDE pattern from the CVR is shown with event C matching the birch location. That would put the time of hitting the birch at 10:40:58.0 TAWS time or 10:40:58.48 CVR time. If we shift the pattern the way that event D matches the birch location (10:40:59.40 according to the Report) then we have events A and B not aligned with any ground obstacles. In any case the difference between the TAWS time and CVR time is 0.5 or 1.6 sec. accordingly. That's different than TAWS 34,35,36 and 37 discrepancy (3.5 sec.). This would indicate that the integrity of the CVR record has been broken.

      The location of the g forces spikes (yellow zigzag line) is also interesting. If hitting the birch did not induce the spikes then flying through smaller branches could not have done it either.

      One more thing that is very apparent: the plane flies straight up to the TAWS #38 point despite the loss of a part of the wing. The trajectory changes after that point.
      When I plot the g values on the trajectory I face the issue of two different timelines. Polish one ends at 10:41:07.5, the Russian one (at least the one from the graph) at 10:41:04.3. The QAR ended at 10:41:04 (the last recorded value was from 10:41:02.5, but there was 1.5 sec delay in writing data). But most likely the right plot will be the olive green, the green, or somewhere inbetween. Points 1, 2, 3, 4, and 5 are where the most violent vertical acceleration occured. A change from 1.35g to 0.22g in 0.2 seconds when the plane is flying 5m above the ground is unexplainable
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