<nowiki>地上共振; résonance-sol; markresonans; rezonans naziemny; bakkeresonans; земной резонанс; Bodenresonanz; ground resonance; رنين أرضي; کوبش به زمین; земний резонанс; imbalance helicopter rotation when the blades become bunched in the rotational plane, typically on the ground when the landing gear is prevented from freely moving; ubalanse helikopterrotasjon når bladene bunter seg i rotasjonsplanet, typisk på bakken når landingsutstyret forhindres fra å bevege seg fritt; дисбаланс обертання гелікоптера, коли лопаті стають згрупованими в площині обертання, як правило, на землі, коли шасі не може вільно рухатися; теория самовозбуждающихся колебаний; رنين ارضي</nowiki>
ground resonance imbalance helicopter rotation when the blades become bunched in the rotational plane, typically on the ground when the landing gear is prevented from freely moving ![](https://cdn.statically.io/img/upload.wikimedia.org/wikipedia/commons/thumb/a/a5/Helicopter_rotor_joints.svg/230px-Helicopter_rotor_joints.svg.png) Illustration of the shift in the location of the center of mass of a helicopter rotor caused by the individual blades' rotation in their respective vertical jounts. |
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Ground resonance on helicopter.