A movable surface on a plane designed to change the plane's direction. May be used alone, or in combination. See aileron, flaps,rudder, elevator. The upward angle of the wings, as seen from the nose. Dihedral enhances stability.
Trainers tend to have high dihedral, but aerobats have little or none.
Refers to the volume of space a piston displaces, and implies an engine's ability to produce thrust. Moving the elevator makes the plane climb or dive. See also Retractable Landing Gear. The control surface on a wing closest to the fuselage. Moves up or down, to increase lift or drag.