Blade balancing

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The main rotor of a helicopter forms a large rotating mass, and must be carefully balanced about the hub in order to avoid unnecessary vibration.

Blades should be balanced in two ways:

  • Static balance
The blades should have identical mass.
  • Dynamic balance
The centre of gravity of the blades should be at the same distance from the hub.

A blade balancer helps with this task.

See also

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