In a power-on stall at 60° bank, the stall speed is higher with gear and flaps up than with gear and flaps down.

In a power-on stall at 60° bank, the stall speed is higher with gear and flaps up than with gear and flaps down.

• A. The stall speed is higher with gear and flaps down.
• B. The stall speed is lower with gear and flaps up than with gear and flaps down.
• C. The stall speed is unaffected by gear and flaps configuration.
• D. The stall speed is higher with gear and flaps up than with gear and flaps down.

Answer: (D)

In a stall, the speed at which the wing can produce enough lift to support the aircraft depends on the lift coefficient at the onset of the stall and the load factor acting on the wing. When you put the aircraft in a banked turn, the load factor increases (at 60° bank, a level turn would demand about twice the lift), so the stall speed rises because more lift is required for the same airspeed. Flaps affect how much lift the wing can generate. Deploying flaps increases the wing’s camber and the maximum lift coefficient (Cl_max), so the aircraft can reach the stall at a lower airspeed. Retracting flaps (flaps up) reduces Cl_max, raising the stall speed for a given load factor. Since the gear configuration is the same in both cases, the difference comes from the flap setting. Therefore, the stall speed is higher with flaps up than with flaps down in a power-on stall at 60° bank.

In a stall, the speed at which the wing can produce enough lift to support the aircraft depends on the lift coefficient at the onset of the stall and the load factor acting on the wing. When you put the aircraft in a banked turn, the load factor increases (at 60° bank, a level turn would demand about twice the lift), so the stall speed rises because more lift is required for the same airspeed.

Flaps affect how much lift the wing can generate. Deploying flaps increases the wing’s camber and the maximum lift coefficient (Cl_max), so the aircraft can reach the stall at a lower airspeed. Retracting flaps (flaps up) reduces Cl_max, raising the stall speed for a given load factor.

Since the gear configuration is the same in both cases, the difference comes from the flap setting. Therefore, the stall speed is higher with flaps up than with flaps down in a power-on stall at 60° bank.