Which trim is NOT a trim type?

Which trim is NOT a trim type?

• A. Manual Trim
• B. Autopilot Trim
• C. Auto Trim (Flap Compensation)
• D. Pitch Trim

Answer: (D)

Trim systems are used to relieve control forces and hold the aircraft in a stable attitude. The three clear trim methods described here are manual trim, where the pilot physically moves the trim control; autopilot trim, where the autopilot makes trim adjustments; and auto trim with flap compensation, which automatically trims to counter the pitching moment caused by flap movement. Pitch trim, by contrast, refers to the axis around which trimming occurs—the elevator stabilizer angle used to set the aircraft’s pitch moment—rather than a separate method of applying trim. So pitch trim isn’t a distinct trim type; it’s the direction the trim is acting, not a standalone trim category.

Trim systems are used to relieve control forces and hold the aircraft in a stable attitude. The three clear trim methods described here are manual trim, where the pilot physically moves the trim control; autopilot trim, where the autopilot makes trim adjustments; and auto trim with flap compensation, which automatically trims to counter the pitching moment caused by flap movement. Pitch trim, by contrast, refers to the axis around which trimming occurs—the elevator stabilizer angle used to set the aircraft’s pitch moment—rather than a separate method of applying trim. So pitch trim isn’t a distinct trim type; it’s the direction the trim is acting, not a standalone trim category.