# Deceleron

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> Source: https://en.wikipedia.org/wiki/Deceleron
> Source revision: 1326247042
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{{Short description|Type of aileron}}
{{onesource|date=June 2024}}
thumb|250px|An A-10 Thunderbolt II with its decelerons opened

The '''deceleron''',  or split [aileron](/source/aileron), was developed in the late 1940s by [Northrop](/source/Northrop_Corporation), originally for use on the [F-89 Scorpion](/source/F-89_Scorpion) fighter. It is a two-part aileron that can be deflected as a unit to provide [roll](/source/Aileron_roll) control, or split open to act as an [air brake](/source/air_brake_(aircraft)). Decelerons are used on the [Fairchild Republic A-10 Thunderbolt II](/source/Fairchild_Republic_A-10_Thunderbolt_II), and in turn to a [stabilizer](/source/Stabilizer_(aeronautics)) the [Northrop Grumman B-2 Spirit](/source/Northrop_Grumman_B-2_Spirit) [flying wing](/source/flying_wing).<ref>{{Cite web |title=NORTHROP FLYING WINGS-PART 1 |url=https://media.defense.gov/2021/Aug/18/2002834486/-1/-1/0/LOOKBACK_FLYING%20WINGS-PART%201_SM.PDF |access-date=19 Oct 2025 |website=United States Department of Defense}}</ref> In differential use they impart yaw moment, potentially obviating the rudder and vertical stabilizer control surface, although requiring active flight control.

==See also==
* [Index of aviation articles](/source/Index_of_aviation_articles)
* [Spoileron](/source/Spoileron)

==References==
{{Reflist}}

==External links==
*{{commonscatinline|Decelerons}}
* [https://digital.library.unt.edu/ark:/67531/metadc65367/m1/1/ XF-89 Research Report]

{{Aircraft components}}

Category:Aircraft controls

{{Component-aircraft-stub}}

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Adapted from the Wikipedia article [Deceleron](https://en.wikipedia.org/wiki/Deceleron) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Deceleron?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.