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== Purpose ==
The main purpose of the circulation control wing is to increase the [[lifting force]] of an aircraft at times when large lifting forces at slow speeds are required, such as [[takeoff]] and [[landing]]. Wing [[Flap (aircraft)|flaps]] and [[slats]] are currently used during landing on almost all aircraft and on takeoff by larger jets. While flaps and slats are effective in increasing lift, they do so at a high cost of drag.<ref name="cc" /> The benefit of the circulation control wing is that no extra drag is created and the lift coefficient is greatly increased. It is being claimed that such a system could increase the landing coefficient of lift of a [[Boeing 737]] by 150% to 250%, thus reducing approach speeds by 35% to 45% and landing distances by 55% to 75% and that such advances in wing design could allow for dramatic wing size reduction in large, wide body jets.<ref name="cc" />
[[Image:CCW Diagram.jpg|thumb|A [[Blackburn Buccaneer|Buccaneer]] pictured with the blowing slots visible on the leading edges. The extended [[Flap (aircraft)|flaps]] are contributing to the [[coanda]] airflow over the wing.]]
== Other uses ==
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===== Noise reduction =====
The use of a CCW system eliminates the need for large complex components in the free stream such as [[Flap (aircraft)|flaps]] and [[slats]], greatly reducing the [[noise pollution]] of modern aircraft.<ref>{{cite web |url=http://pdf.aiaa.org/preview/CDReadyMFLC06_1187/PV2006_3011.pdf |title=Large Eddy Simulation of a Circulation Control Airfoil. |accessdate=2007-12-18 |last=Slomski |first=J.F. |coauthors= |date=2006-06-05|format=PDF}}</ref> Additionally, a much shorter ground roll coupled with steeper climb outs and approaches reduces the ground noise footprint. The blowing slots themselves will contribute very little to the noise of the aircraft as each slot is just a fraction of an inch wide.<ref>{{cite web |url=http://www.airspacemag.com/issues/2007/april-may/custer_channel_wing.php?page=2|title=Circulation Control Technology|accessdate=2007-12-15}}</ref>
== Powering the wing ==
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