Strange video : Helicopter falls apart on landing

Discussion in 'Off-Topic' started by bertus, Feb 24, 2012.

  1. bertus

    Thread Starter Administrator

    Apr 5, 2008
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  2. hwy101

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    May 23, 2009
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  3. BSomer

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    At least it didn't do that while in flight.
     
  4. R!f@@

    AAC Fanatic!

    Apr 2, 2009
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    Hot dam.....That's just too freakeee'
     
  5. steveb

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  6. spinnaker

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    Oct 29, 2009
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    If it was not for the people inside I would have sworn that was a toy.
     
  7. R!f@@

    AAC Fanatic!

    Apr 2, 2009
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    Does the welding also comes apart.?
    But Is it possible ?
     
  8. debe

    Well-Known Member

    Sep 21, 2010
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    Ive seen this machine literaly shake a car to pieces & also crush them into a small object.
     
  9. Sparky49

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    Jul 16, 2011
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    There's a plank of wood that's on the floor.
     
  10. maxpower097

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    Feb 20, 2009
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    Being from the RC Heli world thats a unbalanced blade. Meaning one blade is significantly heavier then the other. We can simulate the same thing to scale by glueing a penny to on blade. In real life something big must knocked that rotor out of balance.
     
  11. magnet18

    Senior Member

    Dec 22, 2010
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    It would appear that what happened was something caused a "jolt", if you will, on startup that caused motion of the rotor axis beyond what the dampening system could handle, and since it was on the ground, it was allowed to "spiral out of control"; pardon the pun.
    I doubt human stupidity was the cause, other than possibly not realizing what was happening and either accelerating or shutting down to cease the resonance.

    (dads an aerospace engineer)
     
  12. steveb

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    Jul 3, 2008
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    I wasn't saying stupidity was the cause of that accident, although a better pilot might have sensed the problem developing and reacted in a way to prevent the severe damage.

    I was pointing to another video where a student pilot took off without his instructor and lost control, resulting in even more severe damage.
     
  13. magnet18

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    Dec 22, 2010
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    thats what i get for posting while tired :p
     
    steveb likes this.
  14. maxpower097

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    Its called Resonance? I think in the heli world where you get to a certain RPM and if everything not balanced the Resonance tears the heli apart.
     
  15. magnet18

    Senior Member

    Dec 22, 2010
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    yep
    everything has a resonant frequency (electronic circuits included), its the job of the engineers to try to make sure it doesn't resonate during normal operation
     
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