SIFT Army Aviation Practice Test 2025 – Complete Exam Prep

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Question: 1 / 400

The phenomenon of a helicopter sinking into its own downwash is called:

L/Wmin (minimum lift-to-weight ratio).

An airfoil stall.

Vortex torque state.

Settling with power.

Settling with power refers to a situation in which a helicopter descends into its own downwash, resulting in a loss of lift and an increased rate of descent. This phenomenon occurs when the helicopter is in a flight condition where it cannot achieve sufficient lift to counteract its weight, despite having power available from the rotor system. It typically happens when the helicopter is operating at a low airspeed and is attempting to hover or descend while using excess power.

In this state, the helicopter encounters a substantial amount of turbulence from its own rotor downwash, which disrupts the smooth airflow over the rotor blades. This turbulence can lead to a reduction in lift, causing the helicopter to settle more rapidly toward the ground. Pilots must be aware of this phenomenon to avoid conditions that would lead to settling with power, which can pose a hazard during landings or when transitioning to a hover.

The other options describe different aerodynamic or operational issues unrelated to the specific situation of a helicopter sinking into its own downwash.

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