What is the primary control used to alter the pitch of an aircraft?

The primary control used to alter the pitch of an aircraft is the elevators. Elevators are movable surfaces located on the tail section of the aircraft, typically on the horizontal stabilizer. When the pilot manipulates the control yoke or stick, the elevators move either up or down. This movement changes the aerodynamic forces acting on the tail, which in turn causes the nose of the aircraft to pitch up or down.

Pitch refers to the angle of the aircraft's nose in relation to the horizon, and controlling pitch is crucial for maintaining altitude and managing climb or descent during flight. Elevators play a fundamental role in the aircraft's stability and controllability, directly influencing the aircraft’s angle of attack and its performance during various phases of flight.