SIFT Army Aviation Practice Test 2025 – Complete Exam Prep

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What role does the rotor system play in the upward movement of a helicopter?

It generates lift by creating differences in air pressure

The rotor system is crucial for a helicopter's ability to ascend, primarily because it generates lift through the creation of differences in air pressure. When the rotor blades spin, they are designed to create a pressure difference above and below the blades. As the blades cut through the air, the shape and angle of the blades result in lower pressure on the upper surface and higher pressure underneath. This pressure differential generates lift, allowing the helicopter to rise vertically.

Understanding that the rotor system is responsible for lift clarifies its main purpose. While it does contribute to aspects of stability and control during flight, its fundamental function is to produce the upward force necessary for takeoff and ascent. Other aspects, such as managing descent speed or steering, are secondary to this primary function of lift generation.

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It solely manages the helicopter's descent speed

It primarily functions as a stabilizer during flight

It only serves to steer the helicopter

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