What are the two major components of the propulsion system?

The correct answer identifies the two major components of the propulsion system as the engine and the propeller. This pair is fundamental to the operation of an aircraft, as the engine generates the necessary thrust to propel the aircraft forward, while the propeller converts the rotational energy produced by the engine into thrust.

In this context, the engine provides the power required for flight, and the propeller is crucial in translating that power into movement through the air. Together, they work in a coordinated manner to enable the aircraft to achieve and maintain flight. This interaction is essential for the overall performance, efficiency, and control of the aircraft during various phases of flight.

The other options, while they include components related to the aircraft’s propulsion system, do not represent the primary elements responsible for generating thrust in a T-6B aircraft.