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Recent content by Sym P. le

  1. Sym P. le

    Helicopter crash Hudson River

    Sorry waross, I can't put my head in a bag.
  2. Sym P. le

    Helicopter crash Hudson River

    A hard landing can cause a boom strike as can a narrow set of in flight conditions, none of which make it a go to theory as an initiator for this incident. I don't need to wait for a certified gov report before I start to familiarize myself with publically available information and I hope...
  3. Sym P. le

    Helicopter crash Hudson River

    The rotor went its own way, discarding dreams of harmony. I'll never make it as a wordsmith, but then, was it Lennon that channeled cauliflower?
  4. Sym P. le

    Helicopter crash Hudson River

    Here's the frame which was ripped out of the fuselage.
  5. Sym P. le

    Helicopter crash Hudson River

    The yaw isn't so much a loss of tail rotor function, it's that when the drive train seizes, the inertia of the lifting blades instantly spins the aircraft in the opposite direction with sufficient force that the tail rotor can't counter even if it were still functional.
  6. Sym P. le

    Helicopter crash Hudson River

    My animated gifs are here (long) and here (short slo-mo) They are an interesting study in video editing. The source video is not continuous. The file size is controlled by algorithms leaving out "redundant" frames and substituting duplicates (or many more) of other frames to make up the lost...
  7. Sym P. le

    Helicopter crash Hudson River

    The tail rotor shaft sits atop the tail structure, enclosed in its own shroud. The two inner members I believe are vertical and horizontal stabilizer linkages. I think they were just pinched as the tail snapped off.
  8. Sym P. le

    Helicopter crash Hudson River

    I don't see any torsional component to the tail failure. It looks like a clean break to the right and slightly down, given the break line along the row of rivets. I don't know if a driveline seizure could whip the aircraft around so fast that the tail couldn't follow but that's what it seems...
  9. Sym P. le

    Helicopter crash Hudson River

    From the B-roll, ??
  10. Sym P. le

    Helicopter crash Hudson River

    Rinse and repeat.
  11. Sym P. le

    Helicopter crash Hudson River

    I don't think so. The videos clearly show the assembly twirling down intact. I believe the blades broke on impact though I could be corrected. It continually amazes me the penchant for popular knowledge regardless of its senselessness. We already have a clear photo of the self-destructed...
  12. Sym P. le

    Helicopter crash Hudson River

    How the turbine held on, by a few threads via the combustion chamber. We can see this in a similar orientation in the crash video (frame grabs posted above).
  13. Sym P. le

    Helicopter crash Hudson River

    From a New Zealand report here, a typical powerplant layout. Also, from the first photo, it appears that the mast is significantly bent. I noticed from the crash video that the entire drive bay was empty, leaving mostly just the passenger compartment. Posted are four cropped frames (not all...
  14. Sym P. le

    Helicopter crash Hudson River

    The tail assembly appears to become unstable as the aircraft starts yawing (or what appears to be yawing). Given the unknown compression parameters applied to the original video, it's difficult to assess what may be algorithm induced artifacts. Edit: The aircraft might have already rolled...

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