Air brake may refer to:
*
Air brake (aeronautics)
In aeronautics, air brakes or speed brakes are a type of flight control surface used on an aircraft to increase the drag on the aircraft. Air brakes differ from spoilers in that air brakes are designed to increase drag while making littl ...
, a type of flight control system used on aircraft to reduce speed
* On ground vehicles,
(more formally, specified as) compressed-air-actuated braking systems:
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Air brake (road vehicle)
An air brake or, more formally, a compressed-air-brake system, is a type of friction brake for vehicles in which compressed air pressing on a piston is used to apply the pressure to the brake pad or brake shoe needed to stop the vehicle. Air bra ...
, friction-mediated type of brake used on large road vehicles in place of hydraulic brakes
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Railway air brake
A railway air brake is a railway brake power braking system with compressed air as the operating medium. Modern trains rely upon a fail-safe air brake system that is based upon a design patented by George Westinghouse on April 13, 1869. The ...
(used on both locomotives, and on towed or pushed cars)
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