Ground Resonance in Helicopters
Inspired by this recent video
I felt inspired to make a compilation of clips showing the "ground resonance" effect in helicopters.
When a helicopter has contact with the ground it becomes a completely different dynamical system compared to its flying state. Certain frequency ranges of the rotor have to be passed very quickly then. Otherwise it can lead to catastrophic failure.
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Comments
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2. snotraddict commented 6 years ago
0:56 shake that booty. 



5. thundersnow commented 6 years ago
Wow, never heard of an issue like that before...learned something new, thanks for sharing kirkelicious 



6. ComentAtor commented 6 years ago
#5 agree , that's why i still come here 



8. Judge-Jake commented 2 years ago
Few sights more sad than a dead helicopter. 

+14 1. LQoQK commented 6 years ago
https://www.youtube.com/watch?v=mXda46z9usA