What is the stall speed with Flaps APP/Idle (Vs1)?

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Multiple Choice

What is the stall speed with Flaps APP/Idle (Vs1)?

Stall speed changes with configuration because it’s the speed at which the wing can no longer provide enough lift to support the airplane’s weight. When flaps are set to APP/Idle, the wing’s lift capability at a given angle of attack is increased, so the stall occurs at a lower airspeed than in a clean configuration. For this specific APP/Idle setup, the data give a stall speed (Vs1) of about 89 knots. That’s the value you’d expect when the airplane is configured for approach with modest flap deflection and idle power. The other numbers represent stall speeds in different configurations or weights. They’re not the same as Vs1 for APP/Idle, which is why they aren’t the correct match for this particular condition.

Stall speed changes with configuration because it’s the speed at which the wing can no longer provide enough lift to support the airplane’s weight. When flaps are set to APP/Idle, the wing’s lift capability at a given angle of attack is increased, so the stall occurs at a lower airspeed than in a clean configuration.

For this specific APP/Idle setup, the data give a stall speed (Vs1) of about 89 knots. That’s the value you’d expect when the airplane is configured for approach with modest flap deflection and idle power.

The other numbers represent stall speeds in different configurations or weights. They’re not the same as Vs1 for APP/Idle, which is why they aren’t the correct match for this particular condition.

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