What component adjusts the angle of rotor blades?

• A. swashplate
• B. barrel
• C. dome
• D. spinner

Answer: (A)

The swashplate is the component that adjusts the angle of the rotor blades. It translates the pilot’s cyclic and collective inputs into blade pitch changes as the blades rotate. The swashplate has a stationary part fixed to the mast and a rotating part that moves with the blades. When you apply collective, the swashplate moves up or down as a unit, changing the pitch of all blades equally to control lift. When you use cyclic, the swashplate tilts, causing different blades to pitch differently through their rotation, which tilts the rotor plane and steers the aircraft. Other parts like the spinner, dome, or barrel do not control blade pitch; they serve as fairings or hub components rather than pitch-control mechanisms.