What does elevator deflection primarily change to affect the aircraft’s pitching moment?

What does elevator deflection primarily change to affect the aircraft’s pitching moment?

• A. Tail lift
• B. Wing lift
• C. Fuselage drag
• D. CG location

Answer: (A)

Elevator deflection primarily changes the lift on the horizontal tail. By tilting the elevator, you alter the tail plane’s angle of attack, which changes the lift (or downward force) the tail produces. Since the tail is behind the center of gravity, this change in tail lift creates a pitching moment about the CG, producing a nose-up or nose-down rotation. Wing lift and fuselage drag aren’t directly set by elevator deflection, and the CG location is determined by mass distribution, not by the elevator’s position. The tail lift is the key lever for controlling pitch.

Elevator deflection primarily changes the lift on the horizontal tail. By tilting the elevator, you alter the tail plane’s angle of attack, which changes the lift (or downward force) the tail produces. Since the tail is behind the center of gravity, this change in tail lift creates a pitching moment about the CG, producing a nose-up or nose-down rotation. Wing lift and fuselage drag aren’t directly set by elevator deflection, and the CG location is determined by mass distribution, not by the elevator’s position. The tail lift is the key lever for controlling pitch.