PLT259 PVTGROUND RESONANCE IS MOST LIKELY TO DEVELOP WHENA) ON THE...
99.
PLT259
PVT
Ground resonance is most likely to develop when
A) on the ground and harmonic vibrations develop between the main and tail rotors.
B) a series of shocks causes the rotor system to become unbalanced.
C) there is a combination of a decrease in the angle of attack on the advancing blade and an increase in the angle of attack on
the retreating blade.