Ground resonance destroying a helicopter


This GIF shows a test carried out on CH-47. This helicopter gets destroyed only because of ground resonance. Ground resonance is the imbalance caused due to bunching of blades on one side of the copter which causes an oscillation to become in phase with the frequency of rocking of the helicopter on its landing gear. This is basically an imbalance in the helicopter rotor’s rotation.

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Ground resonance destroying a helicopter

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