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词条 Boeing A160 Hummingbird
释义

  1. Design and development

     Maverick and Renegade UAVs  A160 

  2. Operational history

     Flight testing  U.S. Army cancellation 

  3. Specifications

  4. See also

  5. References

  6. External links

name=A160 Hummingbird
YMQ-18		image=Boeing A160 Hummingbird VTOL-UAS.jpgcaption=

}}{{Infobox Aircraft Type

type=UAV helicopternational origin=United Statesmanufacturer=Boeing Advanced Systemsdesigner=first flight=2002introduced=retired=status=primary user=more users=produced=number built=variants with their own articles=
}}

The Boeing A160 Hummingbird (military designation: YMQ-18A) is an unmanned aerial vehicle (UAV) helicopter. Its design incorporates many new technologies never before used in helicopters, allowing for greater endurance and altitude than any helicopter currently in operation.

The development of Hummingbird was begun for DARPA by Frontier Aircraft in 1998. From 2003 both the US Army and the US Navy also shared in funding the project. In May 2004, the company was acquired by Boeing and became integrated into Boeing Phantom Works and then into the Advanced Systems group of Boeing Integrated Defense Systems.[1] Early A160s were powered by modified Subaru automotive engines, but newer versions use Pratt & Whitney PW207D turboshaft engines.[1]

The A160 continued with developmental flight tests in 2010, but test flights had already demonstrated greater endurance, higher altitudes, more extensive autonomy, and greater payload.{{than what?|date=May 2015}} The program had ambitious goals of a {{convert|2500|mi|adj=on}} range, 24-hour endurance, and {{convert|30000|ft|abbr=on}} altitude. Flights were largely autonomous, with the aircraft making its own decisions about how to fly itself so as to meet certain objectives, rather than relying on real-time human control. The A160 achieved maximum speeds of over 140 knots, though endurance and altitude were its goals, not speed. The aircraft measures {{convert|35|ft|m|abbr=on}} from nose to tail and has a rotor diameter of {{convert|36|ft|m|abbr=on}}.[2]

The project was abandoned by the US Army in December 2012.

Design and development

Maverick and Renegade UAVs

{{see also|Robinson R22#Maverick and Renegade UAVs}}

During the initial development of the A160 airframe and rotor system in 1999-2000, Frontier Systems simultaneously designed the Maverick vertical take-off and landing (VTOL) UAV as a testbed for avionics, software and flight control systems. The Maverick was a highly modified version of the Robinson R22 light civilian helicopter. By using a proven helicopter airframe, engineers were able to focus on developing systems that could be later transferred to the A160.[3][4]

The Maverick program began in 1998, with the first flight taking place less than a year later in 1999. Although the R22 was a two-seat manned helicopter in its original configuration, the Maverick was significant for never having used a "safety pilot" (a human pilot riding on board and capable of recovering the aircraft in the event of a failure of the unmanned flight control system). Since much of the software and avionics systems were shared between Maverick and A160, Maverick remained in service long after A160 began flight operations. After acquiring Frontier Systems in 2004, Boeing halted most development of Maverick but it continued flying as a training asset and for reducing risk in technology development for the A160.[4]

Four Mavericks were flown by the US Navy, carrying Wescam Electro-Optical/Infrared sensor system, possibly among other sensors.[5] Since being acquired by the military, most Maverick operations are unpublicized.

March 2006 saw the completion of the Software Enabled Control program sponsored by the Defense Advanced Research Projects Agency(DARPA). With the help of researchers from UC Berkeley, MIT, and Georgia Tech, Boeing developed a variant of its Maverick UAV platform which became known as the Renegade UAV. This aircraft successfully performed various maneuvers and flew routes without real-time human input.[6][7]

A160

The development program for the A160 began when DARPA awarded a 30-month technology demonstration contract to San Diego-based Frontier Systems in March 1998, owned by UAV pioneer Abe Karem.[8] In June 1999, Frontier tested the autonomous flight control system with the Maverick-A, a modified Robinson R22. This test bed was lost during a crash in 2000, after having flown for 215 hours. The first prototype, a three-blade A160, demonstrated a brief hover on December 7, 2001 and performed its first forward flight on January 29, 2002.[9]

A four-blade version of the A160 flew in November 2002 using a Subaru four-cylinder engine, and later a six-cylinder piston engine.[2][10] Frontier Systems was awarded a contract for four more A160s in October 2003.[11] A total of three vehicles were produced by Frontier Systems. Vehicles 1 and 3 were lost in crashes. Frontier began a planned KW600 Diesel engine for the vehicle, but never completed it. A Diesel engine would have nearly doubled the vehicle endurance due to lower fuel consumption.[12][13][14]

Frontier Aircraft, and later Boeing, carried out the A160 program as part of a series of contracts with Defense Advanced Research Projects Agency (DARPA), the United States Army, and the United States Navy from 2003.[2][15] In September 2003, DARPA awarded Frontier a $75 million contract for the design, development and testing of four A160s.[15]

The A160's rotor includes blades whose stiffness and cross-section vary along their length. Their low loading and rigid, hingeless design allows for changing RPM between 140 and 350[16] using a two-speed transmission[14][17] to optimize efficiency at different speeds and altitudes, a technique called "optimum speed rotor technology", invented by Abe Karem.[18][19] It is primarily because of these features that the Hummingbird can fly with less power - and thus use less fuel - than comparable conventional helicopters,[10] which only adjust blade pitch and keep the rotor at constant rpm.[20][21][22][23][14]

In August 2005, Frontier Systems, by then a Boeing subsidiary, received a $50 million contract from the Naval Air Warfare Center Aircraft Division "to assess the military utility and affordability of a long-range VTOL UAV employing a wide variety of adaptable payloads".[15]

In October 2007, DARPA awarded Boeing a $6.3 million contract to deliver an A160T aircraft and modified pod for the Autonomous Real-time Ground Ubiquitous Surveillance-Imaging System (ARGUS-IS) program. In 2008, DARPA considered stub wings carrying weapons.[14]

Operational history

Flight testing

The Hummingbird made its first flight in January 2002, using a 4-cylinder Subaru engine.[24][25][26] On September 20, 2004, the Hummingbird made its first flight since Boeing took over the program the previous May.[27] The test program operated from the Southern California Logistics Airport near Victorville, California.[28][29]

In August 2005, the Hummingbird was flown around Victorville in a 1,200-mile course at 60 knots and 4000 feet, one of the longest helicopter flights ever.[30]{{Verify source|date=April 2010}} A mechanical failure caused the helicopter to crash near the end of the flight and flight testing continued some months later after the crash investigation was concluded. On November 30, 2005, the aircraft successfully completed its first flight with a new 290 kW (390 hp) 6-cylinder gasoline-powered piston engine, hovering about the airfield for about half an hour.[25]

A follow-up turboshaft-powered version, the A160T, was first flown on June 15, 2007.[31] It was flown for 8 hours on September 27, 2007 while carrying a 1,000-pound payload. On October 12 it flew for 12 hours while carrying a 500-pound payload, simulating a multi-sensor military reconnaissance mission. This latter flight used up less than 60% of the Hummingbird's maximum fuel load.[32]

On December 10, 2007, one of the A160T prototypes crashed during a flight test at Boeing Advanced Systems' test facility in Victorville.[33][34] A Boeing investigation determined the incident was caused when sensor data stopped being updated to the flight computer: with the feedback loop for the control system effectively cut, the helicopter "departed controlled flight and impacted the ground at a near-vertical angle." Much of the forensic evidence was burned in the post-crash fire. A number of potential areas that could have caused the software feedback update thread to stop were found, and those known problem areas were addressed and flight testing resumed on March 26, 2008.[35]

On May 9, 2008, at Yuma Proving Ground in Arizona, the A160T demonstrated its ability to hover out of ground effect (HOGE) at 15,000 feet to meet its DARPA milestone. It then surpassed the milestone during the same flight by repeating the HOGE at 20,000 feet altitude. A week later, starting the night of May 14, the A160T demonstrated its un-refueled endurance capabilities with an 18.7-hour flight, landing with over 90 minutes of fuel still on board.[36] This was recognized as the longest un-refueled flight of any rotorcraft, and the Fédération Aéronautique Internationale (FAI) awarded Boeing the official endurance record in the 500 kg to 2,500 kg autonomously controlled UAV class for the flight.[37]

Earlier, in May 2004, the U.S. Army Communications-Electronics Command awarded Syracuse Research Corp. a $13.3 million contract for the ultra high frequency, foliage penetrating, real-time moving target indicator/synthetic aperture radar for use in the A160.[15] In August 2008, the A160T began flight testing what came to be known as the DARPA FORESTER radar system.

In August 2009, the A160T was chosen by the US Marine Corps along with the Kaman K-MAX to demonstrate the ability to move 6,000 lb (2,722 kg) of cargo in less than 6 hours for three consecutive days.[38] The A160T successfully completed the re-supply demonstration in early March 2010.[39] In December 2010, NAVAIR awarded a $29.9 million contract to Boeing for two A160Ts and control systems. Kaman received a similar contract worth $46M.[40] NAVAIR issued a stop-work order on the A160 in December 2011, before a Quick Reaction Assessment.[41] The K-MAX was eventually chosen over the A160T for the unmanned resupply role by the Marines, and was sent to Afghanistan in 2011.[42]

On July 28, 2010 an A160T crashed at Southern California Logistics Airport. It autorotated to the ground then rolled on its side.[43]

In August 2010, the A160T underwent jungle test flights in Belize for the U.S. Special Operations Command.[44] Two airframes were involved in tests of the ability of DARPA FORESTER foliage-penetrating radar to penetrate jungle cover. The tests were stopped one week early when one aircraft crashed on September 4, 2010 at the Central Farm airfield in Cayo, Belize[45][46] as the Special Operations Command was turning over its A160s to the Army in 2011.[47] A further crash caused by vibration occurred at Victorville on 17 April 2012, damaging the ARGUS sensor and the aircraft.[48]

U.S. Army cancellation

The A160 was to be deployed to Afghanistan with the ARGUS-IS camera in June 2012. But just before deployment, the Army issued a stop-work order to Boeing because the aircraft had a high "probability of continued technical and schedule delays," and costs and risks had "increased so significantly that program continuation was no longer in the best interest of the government." Vibration was among the issues.[49][50][48] The stop-work order left the A160 still officially developmental, but close to termination.[23] By December 2012, the Army Training and Doctrine Command had reviewed the Army's idea for a VTOL helicopter UAV for ISR missions and decided that, because of budget constraints, they would not continue to pursue the idea. They instead decided that the Army would keep using the fixed-wing UAVs they already had for the role.[51]

Specifications

{{Aerospecs
|ref=Boeing[52]
|met or eng?=eng
|crew=0
|capacity=
|length m=10.7
|length ft=35
|length in=0
|span m=
|span ft=
|span in=
|rot number=1
|rot dia m=11
|rot dia ft=36
|rot dia in=0
|height m=
|height ft=
|height in=
|wing area sqm=
|wing area sqft=
|rot area sqm=
|rot area sqft=
|empty weight kg=1,134
|empty weight lb=2,500
|gross weight kg=2,948
|gross weight lb=6,500
|eng1 number=1
|eng1 type=Pratt & Whitney Canada PW207D[14]
|eng1 kw=410
|eng1 hp=550
|max speed kmh= 258+
|max speed mph= 160+
|max speed kts= 140+
|cruise speed kmh=
|cruise speed mph=
|range nm= 2,250
|range miles=
|endurance h=20+
|endurance min=
|ceiling m=6,100–9,150
|ceiling ft=20,000–30,000
|climb rate ms=
|climb rate ftmin=
|glide ratio=7 (according to Karem)[53]
|armament1=
|armament2=
|armament3=
|armament4=
|armament5=
|armament6=
}}

See also

  • Boeing X-45
  • Northrop Grumman MQ-8 Fire Scout
  • Unmanned aerial vehicle

References

1. ^{{cite news |author= |date= November 1, 2007 |title= Rotorcraft Report: Turbine A160T Flies 8 Hr |publisher= Rotor & Wing Magazine |url= http://www.avtoday.com/rw/commercial/observation/16848.html |archive-url= https://archive.is/20120728140751/http://www.avtoday.com/rw/commercial/observation/16848.html |dead-url= yes |archive-date= July 28, 2012 |accessdate= 2008-11-19 }}
2. ^1 2 {{cite web |last= Parsch |first= Andreas |date= 2007-07-01 |url= http://www.designation-systems.net/dusrm/app4/hummingbird.html |title= Boeing (Frontier Systems) A160 Hummingbird |work= Directory of U.S. Military Rockets and Missiles, Appendix 4: Undesignated Vehicles |publisher= Designation-Systems.Net |accessdate= 2008-11-19 }}
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4. ^1 {{Cite web|url=https://www.globalsecurity.org/intell/systems/a160.htm|title=MQ-18 A160 Hummingbird Warrior|last=Pike|first=John|date=July 2011|website=GlobalSecurity.org|archive-url=|archive-date=|dead-url=|access-date=}}
5. ^{{cite web |last=Parsch |first=Andreas |date=2005-09-01 |url=http://www.designation-systems.net/dusrm/app4/maverick.html |title=Boeing (Frontier Systems/Robinson) Maverick |work=Directory of U.S. Military Rockets and Missiles, Appendix 4: Undesignated Vehicles |publisher=Designation-Systems.Net |accessdate=2008-11-19 }}
6. ^{{cite news |author=Staff |date=2006-03-20 |title=Boeing Completes Successful Autonomous Flight Control Technology Program |publisher=Space Daily |url=http://www.spacedaily.com/reports/Boeing_Completes_Successful_Autonomous_Flight_Control_Technology_Program.html |accessdate=2008-11-19 }}
7. ^{{cite news|author=Staff |date=June 21, 2005 |title=Boeing Team Demonstrates Advanced Autonomous Flight Control for UAVs |publisher=Boeing |url=http://www.boeing.com/news/releases/2005/q2/nr_050621a.html |accessdate=2008-11-19 |deadurl=yes |archiveurl=https://web.archive.org/web/20070807160613/http://www.boeing.com/news/releases/2005/q2/nr_050621a.html |archivedate=August 7, 2007 }}
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9. ^{{cite news |url=http://www.darpa.mil/news/2002/A160flightrelease.doc |archive-url=https://web.archive.org/web/20160304032003/http://www.darpa.mil/news/2002/A160flightrelease.doc |dead-url=yes |archive-date=March 4, 2016 |format=DOC |date=January 31, 2002 |title=A160 Hummingbird Unmanned Air Vehicle Conducts First Forward Flight |publisher=DARPA |access-date=2008-11-07 }}
10. ^1 {{cite news |last=Putrich |first=Gayle |title=Defying convention |url=http://www.flightglobal.com/news/articles/farnborough-cutaway-amp-technical-description-defying-convention-boeing-a160-344075/ |work=FlightGlobal |date=10 September 2010 |accessdate=12 May 2014|archiveurl=https://web.archive.org/web/20140512214348/http://www.flightglobal.com/news/articles/farnborough-cutaway-amp-technical-description-defying-convention-boeing-a160-344075/|archivedate=12 May 2014}}
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13. ^Colucci, Frank. [https://web.archive.org/web/20110720065520/http://www.vtol.org/vertiflite/hummingbird.pdf "Hummingbird Hunts For a Home"]. Vertiflite, Fall 2008.
14. ^1 2 3 4 {{cite news |last=Trimble |first=Stephen |title=DARPA's Hummingbird unmanned helicopter comes of age |url=http://www.flightglobal.com/news/articles/darpa39s-hummingbird-unmanned-helicopter-comes-of-225070/ |work=FlightGlobal |date=3 July 2008 |accessdate=14 May 2014|quote="The rotor speed on a typical helicopter can be varied around 95-102%"|archiveurl=https://web.archive.org/web/20140514181119/http://www.flightglobal.com/news/articles/darpa39s-hummingbird-unmanned-helicopter-comes-of-225070/|archivedate=14 May 2014}}
15. ^1 2 3 {{cite news |author=Staff |date=2008-05-21 |title=A160 Hummingbird: Boeing’s Variable-Rotor VTUAV |publisher=Defense Industry Daily |url=http://www.defenseindustrydaily.com/a160-hummingbird-boeings-variable-rotor-vtuav-03989/ |accessdate=2008-11-19 }}
16. ^The Rise of the Drone Helicopter - A160T Hummingbird {{webarchive |url=https://web.archive.org/web/20140820050027/http://www.popularmechanics.com/technology/military/robots/the-rise-of-the-drone-helicopter#fbIndex3 |date=August 20, 2014 }} Popular Mechanics. Accessed: February 2011.
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18. ^1 Golightly, Glen. "Boeing's Concept Exploration pioneers new UAV development with the Hummingbird and the Maverick" Boeing Frontiers, 2004. Accessed: May 2014. [https://web.archive.org/web/20130517102310/http://www.boeing.com/news/frontiers/archive/2004/december/ts_sf04.html Archive]
19. ^[https://www.google.com/search?tbo=p&tbm=pts&hl=en&q=ininventor:%22Abe+Karem%22 List of Karem patents]{{dead link|date=December 2016 |bot=InternetArchiveBot |fix-attempted=yes }}
20. ^Croucher, Phil. [https://books.google.com/books?id=AovdKRWSqJAC&printsec=frontcover&dq=%22Professional+Helicopter+Pilot+Studies%22&hl=da&ei=LYZ4TdmcDMjRsgbj56TyBw&sa=X&oi=book_result&ct=result&resnum=1&ved=0CD8Q6AEwAA#v=onepage&q&f=true Professional helicopter pilot studies] {{webarchive |url=https://web.archive.org/web/20160914142250/https://books.google.com/books?id=AovdKRWSqJAC&printsec=frontcover&dq=%22Professional+Helicopter+Pilot+Studies%22&hl=da&ei=LYZ4TdmcDMjRsgbj56TyBw&sa=X&oi=book_result&ct=result&resnum=1&ved=0CD8Q6AEwAA#v=onepage&q&f=true |date=September 14, 2016 }} page 2-11. {{ISBN|978-0-9780269-0-5}}. Quote: [Rotor speed] "is constant in a helicopter".
21. ^The UH-60 permits 95–101% rotor RPM UH-60 limits {{webarchive|url=https://web.archive.org/web/20160818162950/http://www.usarmyaviation.com/studyguides/index.php?folder=Documents%2FUH-60BlackhawkSpecific&download=Uh60limits.doc |date=August 18, 2016 }} US Army Aviation. Accessed: 2 January 2010
22. ^John M. Seddon, Simon Newman. [https://books.google.com/books?id=X_X3nOODGLgC&printsec=frontcover&hl=da Basic Helicopter Aerodynamics] {{webarchive |url=https://web.archive.org/web/20161011083351/https://books.google.com/books?id=X_X3nOODGLgC&printsec=frontcover&hl=da |date=October 11, 2016 }} p216, John Wiley and Sons, 2011. Accessed: 25 February 2012. {{ISBN|1-119-99410-1}}. Quote: The rotor is best served by rotating at a constant rotor speed
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25. ^1 {{cite news |author= |date=2 December 2005 |title=Boeing A160 Hummingbird Completes Flight Test |publisher=Boeing |url=http://www.boeing.com/news/releases/2005/q4/nr_051202a.html |archive-url=https://web.archive.org/web/20051207013005/http://www.boeing.com/news/releases/2005/q4/nr_051202a.html |dead-url=yes |archive-date=7 December 2005 |accessdate=2008-11-19 |quote=The objectives of the recent flight test were to open the A160's flight envelope for the latest vehicle configuration, as previous aircraft used four cylinder Subaru engines. }}
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39. ^McHale, John. A160T Hummingbird UAVs from Boeing provided to U.S. Marine Corps {{webarchive |url=https://web.archive.org/web/20110719153816/http://www.militaryaerospace.com/index/display/avi-article-display/4109623854/articles/avionics-intelligence/news/2010/12/a160t-hummingbird.html |date=July 19, 2011 }} Military Aerospace, 4 December 2010. Accessed: 11 December 2010.
40. ^Boeing Awarded $30 Million for A160T Transport UAVs to Support U.S. Marines in Afghanistan {{webarchive |url=https://web.archive.org/web/20101206102342/http://defense-update.com/wp/20101203_cargo_a160t.html |date=December 6, 2010 }}. Defense Update, 3 December 2010. Accessed: 11 December 2010.
41. ^Munoz, Carlos. "Boeing’s ‘Hummingbird’ Out of Mix For New Marine Corps Drone" Breaking Defense, 24 February 2012. Accessed: 14 May 2014. [https://web.archive.org/web/20140514184210/http://breakingdefense.com/2012/02/boeings-hummingbird-back-in-the-mix-for-new-marine-corps-dron/ Archived] 14 May 2014.
42. ^{{cite web| url = http://futureoftech.msnbc.msn.com/_news/2011/12/21/9612653-robotic-helicopters-at-work-in-afghanistan| author = John Roach| title = Robotic helicopters at work in Afghanistan| publisher = Future of Technology, MSNBC| accessdate = 22 December 2011| deadurl = yes| archiveurl = https://web.archive.org/web/20120107173929/http://futureoftech.msnbc.msn.com/_news/2011/12/21/9612653-robotic-helicopters-at-work-in-afghanistan| archivedate = 7 January 2012| df = }}
43. ^Trimble, Stephen. "Boeing unmanned A160T crashes at California airport" {{webarchive |url=https://web.archive.org/web/20100804051913/http://www.flightglobal.com/articles/2010/07/30/345616/boeing-unmanned-a160t-crashes-at-california-airport.html |date=August 4, 2010 }}. Flight International, 30 July 2010. Retrieved 31 July 2010.
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45. ^{{cite news |last=Putrich |first=Gayle |title=A160 Hummingbird crashes during testing in Belize |url=http://www.flightglobal.com/articles/2010/09/10/347201/a160-hummingbird-crashes-during-testing-in-belize.html |work=FlightGlobal |date=10 September 2010 |accessdate=12 September 2010}}
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47. ^"Unmanned Helicopters Today Don't Meet Special Operators' Needs {{webarchive |url=https://web.archive.org/web/20110726004436/http://www.nationaldefensemagazine.org/blog/Lists/Posts/Post.aspx?ID=425 |date=July 26, 2011 }}" May 19, 2011.
48. ^1 Warwick, Graham. "More Bad News for Boeing's Unmanned A160" Aviation Week & Space Technology, 8 July 2012. Accessed: 16 December 2014. [https://web.archive.org/web/20141216181155/http://aviationweek.com/blog/more-bad-news-boeings-unmanned-a160 Archived] on 16 December 2014.
49. ^Hidalgo, Jason. "[https://www.engadget.com/2012/06/26/us-army-stop-work-order-boeing-a160-hummingbird-drone-copter/ US Army breaking up with A160 Hummingbird drone-copter, says it's too high maintenance]" Engadget, 26 June 2012. Accessed: 14 May 2014. [https://web.archive.org/web/20140410201647/http://www.engadget.com/2012/06/26/us-army-stop-work-order-boeing-a160-hummingbird-drone-copter/ Archived] on 14 April 2014.
50. ^Judson, Jen. "Lawmakers Want MQ-18 Funds To Be Held Until Army Shows It Has Need" Inside Defense, May 2012. Accessed: 14 May 2014. [https://web.archive.org/web/20140514195640/http://insidedefense.com/index.php?option=com_user&view=login&return=aHR0cDovL2luc2lkZWRlZmVuc2UuY29tL1VubWFubmVkLVN5c3RlbXMvV2Vla2x5LUFsZXJ0L3dlZWtseS1hbGVydC1tYXktMS0yMDEyL21lbnUtaWQtODkwLmh0bWw= Archived on 14 May 2014]
51. ^[https://archive.is/20130415114735/http://www.nationaldefensemagazine.org/blog/Lists/Posts/Post.aspx?ID=996 Army Unmanned Aircraft Programs: Winners and Losers] - Nationaldefensemagazine, December 12, 2012.
52. ^"A160T Backgrounder {{webarchive |url=https://web.archive.org/web/20140515080454/http://www.uvsr.org/docs/Boeing_A160T-Hummingbird_201006.pdf |date=May 15, 2014 }}" Boeing, June 2010. Accessed: 14 May 2014.
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External links

{{Commons category|Boeing A160 Hummingbird}}
  • A160 page on Boeing.com
  • [https://web.archive.org/web/20080630073916/http://www.darpa.mil/tto/Programs/A160.htm A160 page on DARPA.mil]
  • [https://www.fbo.gov/index?s=opportunity&mode=form&id=d0c1ee7352555c14b4135c6c42a70fda&tab=core&_cview=1 DARPA procurement page]
  • A160 page on GlobalSecurity.org
  • Chronology of A160 contract awards, flights, and modifications, with images
  • "DARPA's Hummingbird unmanned helicopter comes of age". Flightglobal.com, July 3, 2008.
  • "SOCOM reveals plan to buy 20 improved and renamed A160T Hummingbirds". Flightglobal.com, May 6, 2009.
{{Boeing military aircraft}}{{Q-UAVs}}

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