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Air brake (aeronautics)

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Virtually all jet-powered aircraft have an air brake or, in the case of most airliners, lift spoilers that also act as air brakes. Propeller-driven aircraft benefit from the natural braking effect of the propeller when engine power is reduced to idle, but jet engines have no similar braking effect,
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to enable dive bombers, torpedo bombers and fighter aircraft to meet their respective combat performance requirements and, more generally, glide-path control. It discusses different types of air brakes and their requirements, in particular that they should have no appreciable effect on lift or trim
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jets feature combined spoiler and air brake controls. On landing, the deployment of these spoilers ("lift dumpers") causes a significant reduction in wing lift, so the weight of the aircraft is transferred from the wings to the undercarriage. The increased weight increases the available friction
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were equipped with spoilers on the wings in order to adjust their angle of descent during approach to landing. More modern gliders use air brakes that may spoil lift as well as increase drag, dependent on where they are positioned.
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on the aircraft. When extended into the airstream, air brakes cause an increase in the drag on the aircraft. When not in use, they conform to the local streamlined profile of the aircraft in order to help minimize drag.
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and how this may be achieved with split trailing edge flaps on the wings, for example. There was also a requirement to vent the brake surfaces using numerous perforations or slots to reduce airframe buffeting.
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In the early decades of powered flight, air brakes were flaps mounted on the wings. They were manually controlled by a lever in the cockpit, and mechanical linkages to the air brake.
188:(DFS) glider research organization before World War II, developed blade-style self-operating dive brakes, on the upper and lower surface of each wing, for gliders. Most early 560: 322:
that functions normally in flight but can split in half such that the top half goes up as the bottom half goes down to brake. This technique was first used on the
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so jet-powered aircraft must use air brakes to control speed and descent angle during landing approach. Many early jets used parachutes as air brakes on approach (
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A US report written in 1949 describes numerous air brake configurations, and their performance, on wings and fuselage for propeller and jet aircraft.
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used a similar system. The vertically split rudder opened in "clamshell" fashion on landing to act as a speed brake.
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airliners. The Buccaneer air brake, when opened, reduced the length of the aircraft in the confined space on an
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Often, characteristics of both spoilers and air brakes are desirable and are combined - most modern
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The Sky My Kingdom: Memoirs of the Famous German WWII Test-Pilot (Greenhill Military Paperback)
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An early type of air brake, developed in 1931, was fitted to the aircraft wing support struts.
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and other fighters have an air brake located just behind the
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created by the spoilers directly assists the braking effect.
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on landing, showing its rudder deployed in speed brake mode
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A British report written in 1942 discusses the need for
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is also used to help slow the aircraft after landing.
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landing with its large dorsal air brake panel deployed
537:"Spoilers And Speedbrakes - SKYbrary Aviation Safety" 1483: 1462: 1395: 1291: 1126: 992: 829: 645: 264:naval strike aircraft designed in the 1950s and 260:Split-tailcone air brakes have been used on the 77:showing its split speed brakes inboard of the 619: 27:Flight control surface meant to increase drag 8: 494:"A Résumé of Aerodynamic Data on Air Brakes" 144:in that air brakes are designed to increase 626: 612: 604: 185:Deutsche Forschungsanstalt für Segelflug 160:to maintain lift, resulting in a higher 372: 514:Stephenson, Jack D. (September 1949). 384:(first ed.). Osprey. p. 13. 492:Davies, H.; Kirk, F. N. (June 1942). 48:Air brakes on the rear fuselage of a 7: 217:force for braking. In addition, the 330:on several aircraft, including the 240:landing with speed brakes deployed. 25: 592: 471:. 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Index

Speedbrake
Aerobraking
Air brake (road vehicle)

Eurowings
BAe 146-300

Convair F-106 Delta Dart

F-16 Fighting Falcon
stabilators

F-15

DFS
Slingsby Capstan
aeronautics
flight control surface
aircraft
drag
spoilers
drag
lift
lift-to-drag ratio
angle of attack
stall speed
Hans Jacobs
Deutsche Forschungsanstalt für Segelflug
gliders
dive brakes

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