What would be the indicated stall speed during a 40° banked turn with the gear down and flaps set at 45°?

What would be the indicated stall speed during a 40° banked turn with the gear down and flaps set at 45°?

• A. 72 KIAS
• B. 83 KIAS
• C. 95 KIAS
• D. 100 KIAS

Answer: (B)

In a banked turn, the stall speed increases due to the load factor associated with the increased angle of bank. As the angle of bank increases, the aircraft experiences a higher load factor, which in turn raises the stall speed.

When considering a 40° banked turn, the load factor can be determined using the formula: Load Factor = 1 / cos(θ), where θ is the angle of bank. At 40°, the load factor increases significantly, resulting in a higher stall speed compared to straight-and-level flight.

The indicated stall speed can also be influenced by the configuration of the aircraft, particularly with landing gear down and flaps set to 45°. These configurations contribute to a higher stall speed due to increased lift required to support the aircraft's weight and the changes in aerodynamic characteristics.

The calculation reflected in the indicated stall speed for this configuration leads to the value of 83 KIAS, which takes into account the factors of bank angle and aircraft configuration. Additionally, this speed is often derived from performance charts specific to the aircraft type being examined, confirming that 83 KIAS is an accurate representation of the stall speed under the given conditions.