| 词条 | BAE Systems Demon | |||||||||||||||||||
| 释义 |
The Demon is a UAV designed by BAE Systems, as part of its "FLAVIIR" project. It has a novel aerodynamic control system which uses engine exhaust and bleed air to provide the aerodynamic forces usually provided by flaps, ailerons and elevators.[1] [2] It has been called the world's first "flapless" plane.[3]It first flew, from Barrow/Walney Island Airport, off the coast of Cumbria, UK on 17 September 2010. Design and developmentThe unique circulation control system could be employed to reduce the size of the wing on widebody airliners. Its developers hope that the new design could reduce noise, cut fuel and lower maintenance costs. For military fast jets the technology might help to achieve greater stealth. The so-called "fluidic flight controls" guide air from a rectangular exhaust nozzle over upper and lower Coandă effect surfaces to establish pitch. For roll control, bleed air is blown over a Coanda surface installed on the trailing edge of the wing. By controlling boundary layer conditions, the fluidic controls can also provide greater lift or drag on take-off and landing. See also{{aircontent|see also=
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|similar engines= }} References1. ^{{cite patent| country = US| number = 7984879 | status = Grant| title = Flow control actuators | pubdate = 26 Jul 2011 | fdate = 31 Aug 2007 | inventor = Cook, Michael Victor | invent1 = Cook, Michael Victor | invent2 = Warsop, Clyde | assign1 = Bae Systems Plc| class = | url = https://www.google.co.uk/patents/US7984879}} 2. ^{{cite web|url=http://www.flightglobal.com/articles/2010/09/28/347894/pictures.html|accessdate=2010-09-29|title=PICTURES & VIDEO: British team proves flapless flight with Demon UAV| archiveurl= https://web.archive.org/web/20101001233612/http://www.flightglobal.com/articles/2010/09/28/347894/pictures.html| archivedate= 1 October 2010 | deadurl= no}} 3. ^{{cite web|url=http://www.metro.co.uk/news/842292-plane-jets-into-history-by-flying-without-flaps|accessdate=2010-09-29|title=Demon UAV plane jets into history by flying without flaps | work = Metro}} External links
3 : British Aerospace aircraft|British experimental aircraft 2010–2019|Unmanned aerial vehicles of the United Kingdom |
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