Airplanes rely on air resistance with those air brakes to slow down while they're up in the sky. They use it to reduce their speed. This is a practical method while flying.
Air brakes are typically located on the wings or fuselage of an aircraft and can be extended or deployed to create additional drag. They are very useful during landing.
In this video you see: Different Airplane's Air Brake and Spoilers, Airbus, Boeing 737, Russian Bomber Plane, F 15 Plane, Shuttle Plane, Different Air Brakes on Different Aircraft, Jet, Aeroplan.
