Rotorhead

In helicopters the rotorhead is the part of the rotor assembly that joins the blades to the shaft, cyclic and collective mechanisms.

The rotorhead is connected to the main drive shaft via the Jesus nut, and houses several other components such as the swash plate, flight control linkages and fly-bars.

This is done by mounting the blades on flapping and lagging hinges and pitch change bearings.

[3] A common example of a semi-rigid rotor is a teetering rotorhead found on the Robinson family of helicopters.

A rigid rotorhead has no flapping or lag hinges but does have pitch change bearings.