{{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, was developed in the late 1940s by Northrop, originally for use on the F-89 Scorpion fighter. It is a two-part aileron that can be deflected as a unit to provide roll control, or split open to act as an air brake. Decelerons are used on the Fairchild Republic A-10 Thunderbolt II, and in turn to a stabilizer the Northrop Grumman B-2 Spirit 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 * Spoileron
==References== {{Reflist}}
==External links== *{{commonscatinline|Decelerons}} * [https://digital.library.unt.edu/ark:/67531/metadc65367/m1/1/ XF-89 Research Report]
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Category:Aircraft controls
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