What would be the indicated stall speed in a 30° banked turn with the gear down and flaps set at 15°?

• A. 72 KIAS
• B. 82 KIAS
• C. 90 KIAS
• D. 75 KIAS

Answer: (B)

To determine the indicated stall speed during a 30° banked turn with the gear down and flaps set at 15°, it’s important to understand the principles of stall speed and how aircraft maneuvers affect it.

When an aircraft banks, the load factor increases due to the horizontal lift component required to maintain altitude. In a 30° banked turn, the load factor increases, which leads to a corresponding increase in stall speed. The formula to estimate the stall speed in a turn is:

[

V_{S_{turn}} = V_{S_{straight}} \times \sqrt{\frac{1}{\cos(\theta)}}

]

Where ( V_{S_{turn}} ) is the stall speed in the turn, ( V_{S_{straight}} ) is the straight-and-level stall speed, and ( \theta ) is the bank angle.

In the case of a light general aviation aircraft, the stall speed with the gear and flaps configured usually requires a higher speed compared to a clean configuration. The additional drag caused by gear and flaps, as well as the increase in load factor from the bank, means the stall speed can be significantly increased.

By taking into account these variables and considering