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speed brake
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speed brake

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Quick Summary

A speed brake is a device used to increase drag and slow down an aircraft. These are typically found on military aircraft and are large, flat surfaces that can be extended by the pilot to significantly increase drag.1

Speed brakes are useful in various flight conditions, including descent, preparing for landing, and after landing, when deceleration is desired. Other devices that can increase drag include spoilers, flaps, and the extension of landing gear.1

The term "air brake" can also refer to a braking system that uses compressed air, as seen in trains and trucks, or a flap that projects into the airstream to reduce speed for aircraft and race cars.2

Summary created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.
2 Britannica Sources
  1. airplane - Devices for aerodynamic control
  2. air brake

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