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What are air brakes???? How do they work??????/

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In aeronautics air brakes are a type of flight control used on aircraft to reduce speed during landing.

Air brakes differ from spoilers in that air brakes are designed to increase drag while making little change to lift, whereas spoilers greatly reduce the lift-to-drag ratio and a higher angle of attack required to maintain lift, resulting in a higher stall speed.

Often, characteristics of both spoilers and airbrakes are desirable and are combined - most modern airliner jets feature combined spoiler and airbrake controls. On landing, the deployment of these spoilers causes a dramatic loss of lift and hence the weight of the aircraft is transferred from the wings to the undercarriage, allowing the wheels to be mechanically braked with much less chance of skidding. In addition, the form drag created by the spoilers directly assists the braking effect. Reverse thrust is also used to help slow the aircraft after landing.

The British Blackburn Buccaneer naval strike aircraft designed in the 1950s had a tail cone that was split and could be hydraulically opened to the sides to act as a variable air brake. It also helped to reduce the length of the aircraft in the confined space on an aircraft carrier.

Sukhoi Su-30 also uses a different system with an airbrake just behind the cockpit.

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