What are the two sections of the propeller system called?

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Multiple Choice

What are the two sections of the propeller system called?

Explanation:
The propeller system is split into two sections: a rotating portion and a stationary portion. The rotating portion is the hub and blades that spin with the propeller shaft, converting engine power into thrust. The stationary portion stays fixed to the engine/airframe and contains the mounting, gear housing, and the blade pitch-control mechanisms that adjust the angle of the blades. This separation is what lets the control system change blade pitch while the blades continue to rotate, through interfaces that transfer force between the rotating and stationary parts. The other options don’t describe this physical division used in propeller systems.

The propeller system is split into two sections: a rotating portion and a stationary portion. The rotating portion is the hub and blades that spin with the propeller shaft, converting engine power into thrust. The stationary portion stays fixed to the engine/airframe and contains the mounting, gear housing, and the blade pitch-control mechanisms that adjust the angle of the blades. This separation is what lets the control system change blade pitch while the blades continue to rotate, through interfaces that transfer force between the rotating and stationary parts. The other options don’t describe this physical division used in propeller systems.

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