Syöksylippaa

Syöksylippaa is a Finnish term that translates directly to "dive flap" or "dive tab." It refers to a type of control surface found on aircraft wings, similar in function to an aileron but with a distinct design and operational purpose.

Unlike traditional ailerons, which are typically located at the trailing edge of the wing and pivot around a hinge, syöksylippaa are often designed as a hinged section that can move downwards. This downward movement of the syöksylippaa on one wing, combined with a neutral or upward-moving control surface on the other wing, generates differential lift. This difference in lift creates a rolling moment, allowing the pilot to control the aircraft's roll.

The primary advantage of syöksylippaa is their effectiveness at low speeds and high angles of attack, conditions where conventional ailerons might become less responsive or even stall. Their design allows for significant control authority when the wing is operating near its stall boundary, making them particularly useful on aircraft designed for maneuverability, such as aerobatic planes or certain types of fighter aircraft.

The exact implementation and terminology can vary between aircraft designs and manufacturers, but the core principle remains the same: a specialized control surface intended to enhance roll control, especially in challenging flight regimes.