Which component is a rotating section of the propeller?

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Multiple Choice

Which component is a rotating section of the propeller?

Explanation:
The main concept is that the rotating part of a propeller is the blade assembly. The blades are the airfoil surfaces that actually move through the air, converting engine power into thrust as they sweep around with the hub. The other components—barrel, dome, and spinner—serve as support and aerodynamics aids: they provide shape, balance, and streamlined airflow, but they do not contribute to thrust in the same way the blades do. So the rotating, thrust-producing portion is the propeller blades.

The main concept is that the rotating part of a propeller is the blade assembly. The blades are the airfoil surfaces that actually move through the air, converting engine power into thrust as they sweep around with the hub. The other components—barrel, dome, and spinner—serve as support and aerodynamics aids: they provide shape, balance, and streamlined airflow, but they do not contribute to thrust in the same way the blades do. So the rotating, thrust-producing portion is the propeller blades.

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