Question

What is the function of the swashplate in a helicopter&#x27;s main rotor system?

Accepted Answer

The swashplate&#x27;s function in a helicopter&#x27;s main rotor system is to translate the pilot&#x27;s control inputs from the non-rotating fuselage to the rotating rotor blades, allowing for control of both cyclic and collective pitch. The swashplate consists of two main parts: a stationary plate and a rotating plate. The stationary plate is connected to the pilot&#x27;s cyclic and collective controls via mechanical linkages. When the pilot moves the cyclic stick, the stationary plate tilts in the corresponding direction. When the pilot adjusts the collective lever, the stationary plate moves vertically up or down. The rotating plate is mounted above the stationary plate and rotates with the main rotor mast. It is connected to the stationary plate by bearings, allowing it to rotate freely. Pitch links, also called pitch rods, connect the rotating plate to the individual rotor blades. As the stationary plate tilts or moves vertically, the rotating plate follows, and the pitch links change the pitch angle of each rotor blade as it rotates. This allows the pilot to control the helicopter&#x27;s movement by adjusting the cyclic and collective pitch of the rotor blades.

Home → All Courses → Engineering and Technology Courses → Helicopter Operations and Safety Procedures → Flashcard

What is the function of the swashplate in a helicopter's main rotor system?