Editing Aircraft flight control system (section)

===Active Flow Control===
In [[active flow control]] systems, forces in vehicles occur via circulation control, in which larger and more complex mechanical parts are replaced by smaller, simpler fluidic systems (slots which emit air flows) where larger forces in fluids are diverted by smaller jets or flows of fluid intermittently, to change the direction of vehicles.<ref>{{cite journal
 |author=P John 
 |title=The flapless air vehicle integrated industrial research (FLAVIIR) programme in aeronautical engineering 
 |journal=Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 
 |volume=224 
 |issue=4 
 |pages=355–363 
 |publisher=London: Mechanical Engineering Publications 
 |year=2010 
 |url=http://journals.pepublishing.com/content/m9r3684g2874w026/
 |archive-url=https://web.archive.org/web/20180517223645/http://journals.pepublishing.com/content/m9r3684g2874w026
 |url-status=dead
 |archive-date=2018-05-17
 |issn=0954-4100 
 |doi=10.1243/09544100JAERO580 
|hdl=1826/5579 
 |s2cid=56205932 
 |hdl-access=free 
 }}</ref><ref>{{Cite web
 |title        = Showcase UAV Demonstrates Flapless Flight
 |publisher    = BAE Systems
 |year         = 2010
 |url          = http://www.baesystems.com/AboutUs/ShowcaseUAVDemonstratesFlaplessFlight/
 |access-date   = 2010-12-22
 |archive-url  = https://web.archive.org/web/20110707205548/http://www.baesystems.com/AboutUs/ShowcaseUAVDemonstratesFlaplessFlight/
 |archive-date = 2011-07-07
 |url-status     = dead
}}</ref> In this use, active flow control promises simplicity and lower mass, costs (up to half less), and [[inertia]] and response times. This was demonstrated in the [[BAE Systems Demon|Demon UAV]], which flew for the first time in the UK in September 2010.<ref>{{cite news |title=Demon UAV jets into history by flying without flaps |newspaper=Metro.co.uk |publisher=Associated Newspapers Limited |location=London |date=28 September 2010 |url=http://www.metro.co.uk/news/842292-plane-jets-into-history-by-flying-without-flaps |access-date=29 September 2010 |archive-url=https://web.archive.org/web/20110823110258/http://www.metro.co.uk/news/842292-plane-jets-into-history-by-flying-without-flaps |archive-date=2011-08-23 |url-status=live }}</ref>