Читать книгу Flight Theory and Aerodynamics - Joseph R. Badick - Страница 86

Spoilers are used on many different types of aircraft as high‐drag devices used to increase drag and reduce lift. They “spoil” the smooth air around a wing, and may be used in flight, or on the ground when landing or during a rejected takeoff. Figure 3.9 is an example of deployed ground spoilers to reduce lift over the wing and increase the effectiveness of the brakes. Some aircraft use the spoilers in flight for roll control at higher airspeeds when the action of the ailerons would be too much of a force. Sometimes spoilers are used as speed brakes to reduce lift on both wings, which allows the aircraft to descend without increasing airspeed. Gliders utilize spoilers to control their descent rate upon landing.