An articulated disk tilts relative to the ___

An articulated disk tilts relative to the ___

• A. Mast
• B. Hub
• C. Rotor
• D. Blade

Answer: (B)

In an articulated rotor, each blade is mounted to the hub with a flapping hinge that lets the blade move up and down independently. This hinge arrangement means the plane in which the blades rotate—the articulated disk—can tilt as the blades flap and as cyclic and collective inputs shift the thrust vectors. The hub is the mounting reference for all blades, so the disk’s tilt is described relative to the hub. The mast or rotor frame sets the overall connection to the fuselage, but the actual tilting action of the articulated disk comes from the blade hinges at the hub.

In an articulated rotor, each blade is mounted to the hub with a flapping hinge that lets the blade move up and down independently. This hinge arrangement means the plane in which the blades rotate—the articulated disk—can tilt as the blades flap and as cyclic and collective inputs shift the thrust vectors. The hub is the mounting reference for all blades, so the disk’s tilt is described relative to the hub. The mast or rotor frame sets the overall connection to the fuselage, but the actual tilting action of the articulated disk comes from the blade hinges at the hub.