Editing Wing (section)

==Design features==
[[File:bmi a319-100 g-dbca closeup arp.jpg|thumb|right|The wing of a landing [[BMI (airline)|BMI]] [[Airbus]] [[A319-100]]. The [[leading edge slats|slats]] at its [[leading edge]] and the [[flap (aircraft)|flap]]s at its [[trailing edge]] are extended.]]
Aircraft wings may feature some of the following:
*A rounded [[leading edge]] cross-section
*A sharp [[trailing edge]] cross-section
*Leading-edge devices such as [[leading edge slats|slats]], [[leading edge slot|slots]], or [[leading edge extension|extension]]s
*Trailing-edge devices such as [[flap (aircraft)|flap]]s or flaperons (combination of flaps and ailerons)
*[[Winglets]] to keep wingtip vortices from increasing drag and decreasing lift
*[[Dihedral (aircraft)|Dihedral]], or a positive wing angle to the horizontal, increases ''spiral stability'' around the roll axis, whereas ''anhedral'', or a negative wing angle to the horizontal, decreases spiral stability.

Aircraft wings may have various devices, such as flaps or slats, that the pilot uses to modify the shape and surface area of the wing to change its operating characteristics in flight.
*[[Aileron]]s (usually near the wingtips) to roll the aircraft
*[[Spoiler (aeronautics)|Spoiler]]s on the upper surface to increase drag for descent and to reduce lift for more weight on wheels during braking
*[[Vortex generator]]s to help prevent flow separation in transonic flow
*[[Wing fence]]s to keep flow attached to the wing by stopping boundary layer separation from spreading roll direction. 
*[[Folding wing]]s allow more aircraft storage in the confined space of the [[hangar|hangar deck]] of an [[aircraft carrier]]
*[[Variable-sweep wing]] or "swing wings" that allow outstretched wings during low-speed flight (e.g., take-off, landing and loitering) and [[swept wing|swept back wing]]s for high-speed flight (including [[supersonic flight]]), such as in the [[F-111 Aardvark]], the [[F-14 Tomcat]], the [[Panavia Tornado]], the [[MiG-23]], the [[MiG-27]], the [[Tu-160]] and the [[B-1B Lancer]].