- a brake or system of brakes operated by compressed air.
- Aeronautics. a device for reducing the air speed of an aircraft by increasing its drag.
- a device for stopping the sails of a windmill by disrupting the flow of air around them.
Origin of air brake
Examples from the Web for air brake
Historical Examples of air brake
There was perfect silence but for the pumping of the air-brake on the engine.Red Men and White
Page 57, changed "air-brakes consists" to "air-brake consists."How to Become an Engineer
Frank W. Doughty
Callahan was seventeen, with hair like a sunset, and a mind quick as an air-brake.The Nerve of Foley
Frank H. Spearman
Written by an Air-Brake Instructor who knows just what is needed.
Endorsed and used by air-brake instructors and examiners on nearly every railroad in the United States.
- a brake operated by compressed air, esp in heavy vehicles and trains
- Also called: dive brake an articulated flap or small parachute for reducing the speed of an aircraft
- a rotary fan or propeller connected to a shaft to reduce its speed