Aviation Dictionary

Ground resonance

Selfexcited vibration occurring whenever the frequency of oscillation of the blades about the lead-lag axis of an articulated rotor becomes the same as the natural frequency of the fuselage.

Dictionary Term

Ground resonance

Definition

Selfexcited vibration occurring whenever the frequency of oscillation of the blades about the lead-lag axis of an articulated rotor becomes the same as the natural frequency of the fuselage.

References

Helicopter Flying Handbook, Federal Aviation Administration, 2019