ohjauspinnan

Ohjauspinnan is a Finnish term that translates to "control surface" in English. It refers to any component on an aircraft that is designed to change its orientation or direction of movement. These surfaces are essential for aerodynamic control and are typically actuated by the pilot or an autopilot system.

The primary ohjauspinnan on an aircraft are the ailerons, elevators, and rudder. Ailerons are located on the trailing edge of the wings and are used to control the roll of the aircraft. When one aileron moves up, the other moves down, causing the aircraft to bank. Elevators are found on the horizontal stabilizer at the tail and control the pitch, or the nose-up/nose-down movement. Moving the elevators up causes the nose to pitch up, while moving them down pitches the nose down. The rudder is attached to the vertical stabilizer at the tail and controls the yaw, which is the side-to-side movement of the aircraft's nose.

In addition to these primary surfaces, some aircraft may have other control surfaces. For instance, flaps and spoilers are also considered types of ohjauspinnan. Flaps, located on the trailing edge of the wings, increase lift and drag, primarily used for takeoff and landing. Spoilers, typically located on the upper surface of the wings, disrupt airflow to reduce lift and increase drag, often used for descent or as airbrakes. The coordinated movement of these ohjauspinnan allows pilots to maneuver aircraft safely and efficiently through the air.