Vibration excites natural frequencies in other components throughout the airframe and engine assemblies.
The expended energy from vibration causes wear of components, reduced performance, passenger discomfort.
Types of imbalance
imbalance is nothing more than an imbalance in a rotating
component, normally the propeller, that is located away from center of the
rotating mass. The farther from the center of rotation, the greater the
imbalance and its destructive force.
majority of aircraft tested have a vibration level of above .3 ips.!!
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