Vs1 stands for which stall speed condition?

Vs1 stands for which stall speed condition?

• A. Stall speed in clean configuration
• B. Maneuvering speed
• C. Stall speed in landing configuration
• D. Maximum structural cruising speed

Answer: (A)

Stall speed depends on how the wing and airplane are configured. The subscripted stall speed numbers specify the configuration being used. Vs1 refers to the stall speed in the clean configuration, meaning the airplane is with flaps up and landing gear up—no extra lift devices extended. In this setup, the wing has less camber and lift at a given speed, so you stall at a higher speed than you would with flaps or gear extended. Knowing this helps pilots estimate safe stall margins for normal flight. The stall speed in landing configuration (with flaps down and gear down) is lower, because the flaps increase lift at lower speeds. The other terms mentioned—maneuvering speed and maximum structural cruising speed—describe different limits related to control responsiveness and structural load, not the stall characteristics.

Stall speed depends on how the wing and airplane are configured. The subscripted stall speed numbers specify the configuration being used. Vs1 refers to the stall speed in the clean configuration, meaning the airplane is with flaps up and landing gear up—no extra lift devices extended. In this setup, the wing has less camber and lift at a given speed, so you stall at a higher speed than you would with flaps or gear extended.

Knowing this helps pilots estimate safe stall margins for normal flight. The stall speed in landing configuration (with flaps down and gear down) is lower, because the flaps increase lift at lower speeds. The other terms mentioned—maneuvering speed and maximum structural cruising speed—describe different limits related to control responsiveness and structural load, not the stall characteristics.