Which is true regarding the use of flaps during level turns?

• A. the flaps have no effect on stall speed in level turns
• B. the raising of flaps increases the stall speed
• C. flaps reduce stall speed in level turns
• D. flaps increase turn radius

Answer: (B)

When a level turn is flown, the wing must produce lift to support weight plus the extra load from the turn, so the required lift increases with bank. Flaps change the wing’s lift characteristics: extending flaps increases the maximum lift coefficient, which allows you to fly slower before reaching the stall in straight-and-level flight. If you raise (retract) the flaps, the wing’s lift capability is reduced, so you must fly at a higher airspeed to generate the needed lift in the turn. Therefore, raising flaps increases the stall speed.