Ailerons control roll in aircraft by moving in opposite directions. Elevators control pitch by moving the tail up or down.

To produce the same effect, modern planes use ailerons, movable surfaces located near the wingtips. The elevator controlled "pitch," or the plane's nose-up/nose-down orientation relative to level ...

Trim is a secondary flight control system that incorporates small tabs on the ailerons, the rudder, and, most commonly, on the elevator. These tabs are moved (either electrically or mechanically ...