View source for Hawker Siddeley Harrier

{{Short description|British ground attack aircraft}}
{{For|experimental biplane torpedo bomber|Hawker Harrier}}
{{Use dmy dates|date=October 2019}}
{{Use British English|date=August 2011}}
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{{Infobox aircraft
 |name= Harrier GR.1, GR.3 <br />AV-8A/C Harrier, AV-8S Matador
 |image= File:Spanish Hawker Siddeley AV-8S Matador in flight over the Mediterranean Sea, 1 June 1988 (6430231).jpg
 |image_caption= AV-8S Matador in flight
 |alt= A Harrier flies over an aircraft carrier below.
 |aircraft_type= [[V/STOL]] [[ground-attack aircraft]]
 |national_origin= United Kingdom
 |manufacturer= [[Hawker Siddeley]]
 |designer=
 |first_flight= 28 December 1967
 |introduction= 1 April 1969<ref>{{Cite web |url=http://www.tangmere-museum.org.uk/aircraft-month/hawker-siddeley-harrier |title=Hawker Siddeley Harrier |date=April 2008 |work=Aircraft of the Month |publisher=Tangmere Military Aviation Museum |language=en-GB |access-date=30 March 2018 |archive-date=9 August 2020 |archive-url=https://web.archive.org/web/20200809055441/https://www.tangmere-museum.org.uk/aircraft-month/hawker-siddeley-harrier |url-status=dead }}</ref>
 |retired= 2006
 |status= Retired
 |primary_user= [[Royal Air Force]] (historical)<!--Limit one (1) primary user.-->
 |more_users= [[United States Marine Corps]] (historical) <br />[[Spanish Navy]] (historical) <br />[[Royal Thai Navy]] (historical)<!-- Limit is three (3) in 'more users' field, four (4) total users with primary user. Please separate with <br />.-->
 |produced= 1967–1970s
 |number_built=278<ref name= "Mason prodnums"/>
 |developed_from= [[Hawker Siddeley P.1127]]/Kestrel
 |variants=
 |developed_into= [[British Aerospace Sea Harrier]] <br />[[McDonnell Douglas AV-8B Harrier II]] <br />[[British Aerospace Harrier II]]
}}

The '''Hawker Siddeley Harrier''' is a British jet-powered [[attack aircraft]] designed and produced by the British aerospace company [[Hawker Siddeley]]. It was the first operational [[ground attack aircraft|ground attack]] and [[reconnaissance]] aircraft with [[vertical/short takeoff and landing]] (V/STOL) capabilities and the only truly successful V/STOL design of its era.

It was the first of the [[Harrier jump jet|Harrier]] series of aircraft, being developed directly from the [[Hawker Siddeley P.1127|Hawker Siddeley Kestrel]] prototype aircraft following the cancellation of a more advanced supersonic aircraft, the [[Hawker Siddeley P.1154]]. In the mid 1960s, the ''Harrier GR.1'' and ''GR.3'' variants were ordered by the British government for the [[Royal Air Force]] (RAF). The Harrier GR.1 made its first flight on 28 December 1967, and entered RAF service in April 1969. During the 1970s, the [[United States]] opted to procure the aircraft as the ''AV-8A''; it was operated by the [[United States Marine Corps|US Marine Corps]] (USMC).

Introduced to service amid the [[Cold War]], the RAF positioned the bulk of their Harriers across [[West Germany]] to defend against a potential invasion of Western Europe by the [[Warsaw Pact]] forces; the unique abilities of the Harrier allowed the RAF to disperse their forces away from vulnerable airbases. The USMC used their Harriers primarily for [[close air support]], operating from [[amphibious assault ship]]s, and, if needed, [[forward operating base]]s. Harrier squadrons saw several deployments overseas. Its ability to operate with minimal ground facilities and very short runways allowed it to be used at locations unavailable to other fixed-wing aircraft. The Harrier received criticism for having a high accident rate and for a time-consuming maintenance process.

In the 1970s, the [[British Aerospace Sea Harrier]] was developed from the Harrier for use by the [[Royal Navy]] (RN) on {{sclass|Invincible|aircraft carrier}}s. Both the Sea Harrier and the Harrier fought in the 1982 [[Falklands War]], in which the aircraft proved to be crucial and versatile. The RN Sea Harriers provided fixed-wing air defence while the RAF Harriers focused on ground-attack missions in support of the advancing British land force. The Harrier was also extensively redesigned as the [[McDonnell Douglas AV-8B Harrier II|AV-8B Harrier II]] and [[British Aerospace Harrier II]] by the team of [[McDonnell Douglas]] and [[British Aerospace]]. During the late 1980s and 1990s, the first-generation aircraft were gradually replaced by the newer Harrier IIs.

==Development==

===Origins===
{{Main|Hawker Siddeley P.1127}}
<!-- This section is a summary. Please add new material to the [[Hawker Siddeley P.1127]] article. -->

The Harrier's design was derived from the [[Hawker Siddeley P.1127|Hawker P.1127]]. Prior to developing the P.1127, [[Hawker Aircraft]] had been working on a replacement for the [[Hawker Hunter]], the [[Hawker P.1121]].<ref>Davies and Thornborough 1997, pp.&nbsp;12–13.</ref> The P.1121 was cancelled after the release of the British Government's [[1957 Defence White Paper]], which advocated a policy shift away from manned aircraft and towards missiles. This policy resulted in the termination of the majority of aircraft development projects then underway for the British military.<ref name= Jefford_11>Jefford 2006, p.&nbsp;11.</ref> Hawker sought to quickly move on to a new project and became interested in Vertical Take Off/Landing (VTOL) aircraft, which did not need runways.{{refn|The development of a V/STOL jet was not Hawker's primary objective as it had put in a joint bid with [[Avro]] to meet the GOR.339 Requirement (which resulted in the [[BAC TSR-2]] development programme), but had been unsuccessful. The inability to obtain work on conventional aircraft in a hostile political climate was perhaps the greatest motivation for Hawker to proceed with the development of the Harrier.<ref name= Jefford_25>Jefford 2005, pp.&nbsp;11–12, 25.</ref>|group=N}} According to Air Chief Marshal [[Patrick Hine|Sir Patrick Hine]] this interest may have been stimulated by the presence of Air Staff Requirement 345, which sought a V/STOL ground attack fighter for the Royal Air Force.<ref name= "Jefford_11–12">Jefford 2006, pp.&nbsp;11–12.</ref>

Design work on the P.1127 was formally started in 1957 by Sir [[Sydney Camm]], [[Ralph Hooper]] of Hawker Aircraft, and [[Stanley Hooker]] of the [[Bristol Engine Company]].<ref name= Jefford_26-27>Jefford 2006, pp.&nbsp;26–27.</ref> The close cooperation between Hawker, the airframe company, and Bristol, the engine company, was viewed by project engineer [[Gordon Lewis (engineer)|Gordon Lewis]] as one of the key factors that allowed the development of the Harrier to continue in spite of technical obstacles and political setbacks.<ref name= Jefford_23>Jefford 2006, p. 23.</ref> Rather than using rotors or a direct jet thrust, the P.1127 had an innovative [[thrust vectoring|vectored thrust]] [[turbofan engine]], the [[Rolls-Royce Pegasus|Pegasus]]. The Pegasus I was rated at {{convert|9000|lb(f)|kN|sigfig=2}} of thrust and first ran in September 1959.<ref name= Jefford_24>Jefford 2006, p. 24.</ref> A contract for two development prototypes was signed in June 1960 and the first flight followed in October 1960.<ref name= Jefford_24/> Of the six prototypes built, three crashed, including one during an air display at the 1963 [[Paris Air Show]].<ref name="Mason 91 p413-6">Mason 1991, pp. 413–416.</ref>

===Tripartite evaluation===
[[File:Hawker Siddeley XV-6A Kestrel USAF.jpg|thumb|Hawker Siddeley XV-6A Kestrel in later [[USAF]] markings|alt=An aircraft landed on a runway]]

In 1961, the United Kingdom, the United States and [[West Germany]] jointly agreed to purchase nine aircraft developed from the P.1127, for the evaluation of the performance and potential of V/STOL aircraft. These aircraft were built by [[Hawker Siddeley]] and were [[British military aircraft designation systems|designated]] ''Kestrel FGA.1'' by the UK.<ref name= Jefford_39>Jefford 2006, p.&nbsp;39.</ref> The Kestrel was strictly an evaluation aircraft and to save money the Pegasus 5 engine was not fully developed as intended, only having {{convert|15000|lb(f)|kN|sigfig=2}} of thrust instead of the projected {{convert|18200|lb(f)|kN|sigfig=2}}.<ref name= Jefford_39/> The Tripartite Evaluation Squadron numbered ten pilots; four each from the UK and US and two from West Germany.<ref name= Jefford_39/> The Kestrel's first flight took place on 7 March 1964.<ref name= Jefford_41>Jefford 2006, p.&nbsp;41.</ref>

A total of 960 sorties had been made during the trials, including 1,366 takeoffs and landings, by the end of evaluations in November 1965.<ref>Spick 2000, p.&nbsp;362.</ref><ref name= Jefford_47>Jefford 2006, p.&nbsp;47.</ref> One aircraft was destroyed in an accident and six others were transferred to the United States, assigned the US designation ''XV-6A Kestrel'', and underwent further testing.<ref>Evans, A. "American Harrier – Part One." ''Model Aircraft Monthly'', Vol. 8, Issue 4, pp.&nbsp;36–39.</ref><ref>Mason, Kenneth J. and Charles R. Rosburg. [http://oai.dtic.mil/oai/oai?verb=getRecord&metadataPrefix=html&identifier=AD0855032 "USAF Evaluation of the Harrier GR Mk 1. – AD0855032".] {{Webarchive|url=https://web.archive.org/web/20170331001757/http://oai.dtic.mil/oai/oai?verb=getRecord&metadataPrefix=html&identifier=AD0855032 |date=31 March 2017 }} ''Air Force Flight Test Center Edwards AFB'', June 1969.</ref><ref>Jenkins 1998, p.&nbsp;16. Retrieved 31 July 2011.</ref> The two remaining British-based Kestrels were assigned to further trials and experimentation at [[RAE Bedford]] with one being modified to use the uprated Pegasus 6 engine.<ref name="Mason 91 p419-0">Mason 1991, pp.&nbsp;419–420.</ref>

===P.1154===
{{main|Hawker Siddeley P.1154}}

At the time of the development of the P.1127 Hawker and Bristol had also undertaken considerable development work on a [[supersonic]] version, the Hawker Siddeley P.1154, to meet a [[North Atlantic Treaty Organization]] (NATO) requirement issued for such an aircraft.<ref name= Jefford_12>Jefford 2006, p.&nbsp;12.</ref> The design used a single [[Bristol Siddeley BS100]] engine with four swivelling nozzles, in a fashion similar to the P.1127, and required the use of [[afterburner|plenum chamber burning]] (PCB) to achieve supersonic speeds.<ref name= 'buttler 119-120'>Buttler 2000, pp. 119–120.</ref> The P.1154 won the competition to meet the requirement against strong competition from other aircraft manufacturers such as [[Dassault Aviation]]'s [[Dassault Mirage IIIV|Mirage IIIV]]. The French government did not accept the decision and withdrew; the NATO requirement was cancelled shortly after in 1965.<ref name= Jefford_12-13>Jefford 2006, pp.&nbsp;12–13.</ref>{{refn|The Mirage IIIV had been rejected mainly because of its excessive complexity, using nine engines compared with the P.1154's single-engine approach.<ref name= Jefford_19>Jefford 2006, p.&nbsp;19.</ref>|group=N}}

The Royal Air Force and the Royal Navy planned to develop and introduce the supersonic P.1154 independently of the cancelled NATO requirement. This ambition was complicated by the conflicting requirements between the two services—while the RAF wanted a low-level supersonic strike aircraft, the Navy sought a twin-engine [[air defence]] fighter.<ref name= Jefford_13>Jefford 2006, p.&nbsp;13.</ref> Following the election of the Labour Government of 1964 the P.1154 was cancelled, as the Royal Navy had already begun procurement of the [[McDonnell Douglas F-4 Phantom II|McDonnell Douglas Phantom II]] and the RAF placed a greater importance on the [[BAC TSR-2]]'s ongoing development.<ref name= Jefford_13/> Work continued on elements of the project, such as a supersonic PCB-equipped Pegasus engine, with the intention of developing a future Harrier variant for the decades following cancellation.<ref>Moxton 1982, p.&nbsp;1633.</ref>{{refn|The supersonic Harrier is not to be confused with the Big Wing Harrier. Neither concept would result in a successor aircraft.<ref>Moxton 1982, p.&nbsp;1635.</ref>|group=N}}

===Production===
[[File:AV-8C VMA-513 takes off from LPD in 1982.JPEG|thumb|upright=1.25|AV-8C Harrier taking off from an [[amphibious transport dock]] ship|alt= A Harrier on the deck of a small aircraft carrier, with its nose wheel off the deck]]
Following the collapse of the P.1154's development the RAF began considering a simple upgrade of the existing subsonic Kestrel and issued Requirement ASR 384 for a V/STOL ground attack jet.<ref name= Jefford_13/> Hawker Siddeley received an order for six pre-production aircraft in 1965, designated ''P.1127 (RAF)'', of which the first made its maiden flight on 31 August 1966.<ref name="mason harrier p78">Mason 1986, p.&nbsp;78.</ref> An order for 60 production aircraft, designated as Harrier GR.1, was received in early 1967.<ref name="Mason harrier p81">Mason 1986, p.&nbsp;81.</ref><ref>[http://www.flightglobal.com/pdfarchive/view/1966/1966%20-%201559.html "VTOL Aircraft 1966".] ''Flight International'', 26 May 1966. p.&nbsp;884. Retrieved 31 July 2011.</ref> The aircraft was named after the [[Harrier (bird)|Harrier]], a bird of prey.<ref>{{cite web |last1=Yarrish |first1=Gerry |title=The Harrier Jump Jet |url=https://www.flightjournal.com/harrier-jump-jet/ |website=Flight Journal |publisher=Air Age Media |access-date=13 June 2019}}</ref>

The Harrier GR.1 made its first flight on 28 December 1967, and it officially entered service with the RAF on 1 April 1969.<ref>{{cite book |last1=Jackson |first1=Robert |title=Britain's Greatest Aircraft |date=2007 |publisher=Pen and Sword |isbn=9781473812673 |page=213}}</ref> The aircraft was built in two factories—one in [[Kingston upon Thames]], southwest London, and the other at [[Dunsfold Aerodrome]], Surrey—and underwent initial testing at Dunsfold.<ref name= Nordeen_66>Nordeen 2006, p.&nbsp;66.</ref> The [[Flight deck#Ski-jump ramp|ski-jump]] technique for launching Harriers from Royal Navy aircraft carriers was extensively trialled at [[RNAS Yeovilton (HMS Heron)|RNAS Yeovilton]] from 1977. Following these tests ski-jumps were added to the flight decks of all RN carriers from 1979 onwards, in preparation for the new variant for the navy, the Sea Harrier.<ref>Vann 1990, p.&nbsp;23.</ref><ref>Evans 1998, p.&nbsp;60.</ref>

In the late 1960s the British and American governments held talks on producing Harriers in the United States. Hawker Siddeley and McDonnell Douglas formed a partnership in 1969 in preparation for American production,<ref name= Nordeen_28>Nordeen 2006, p.&nbsp;28.</ref> but Congressman [[Mendel Rivers]] and the [[House Appropriations Committee]] held that it would be cheaper to produce the AV-8A on the pre-existing production lines in the United Kingdom—hence all AV-8A Harriers were purchased from Hawker Siddeley.<ref name= Nordeen_28/> Improved Harrier versions with better sensors and more powerful engines were developed in later years.<ref name="Evans p31,3"/><ref name="WAPJ6 p54"/><ref name= Nordeen_35/> The USMC received 102 AV-8A and 8 TAV-8A Harriers between 1971 and 1976.<ref name= Nordeen_31>Nordeen 2006, p.&nbsp;31.</ref>
{{clear}}

==Design==

===Overview===
The Harrier was typically used as a ground attack aircraft, though its manoeuvrability also allows it to effectively engage other aircraft at short ranges.<ref name= Brown_71>Brown 1970, p. 71.</ref> The Harrier is powered by a single [[Rolls-Royce Pegasus|Pegasus]] [[turbofan]] engine mounted in the fuselage. The engine is fitted with two air intakes and four vectoring nozzles for directing the thrust generated: two for the bypass flow and two for the jet exhaust. Several small reaction nozzles are also fitted, in the nose, tail and wingtips, for the purpose of balancing during vertical flight.<ref name= Brown_81>Brown 1970, p. 81.</ref> It has two landing gear units on the fuselage and two outrigger landing gear units, one near each wing tip.<ref name= Brown_80>Brown 1970, p. 80.</ref> The Harrier is equipped with four wing and three fuselage pylons for carrying a variety of weapons and external fuel tanks.<ref name=spick_364>Spick 2000, pp. 364–371.</ref>

[[File:AV-8A VMA-513 NAN2-71.jpg|thumb|An RAF Harrier GR.1, on loan to the USMC, displaying its underside with a full load of bombs|alt=A Harrier in flight, with large weapons loadout underneath]]
The Kestrel and the Harrier were similar in appearance, though approximately 90 per cent of the Kestrel's airframe was redesigned for the Harrier.<ref name="Mason harrier p75">Mason 1986, p. 75.</ref> The Harrier was powered by the more powerful Pegasus 6 engine; new air intakes with auxiliary blow-in doors were added to produce the required airflow at low speed. Its wing was modified to increase area and the landing gear was strengthened. Several [[hardpoint]]s were installed, two under each wing and one underneath the fuselage; two {{convert|30|mm|in|sigfig=2|abbr=on}} [[ADEN cannon]] [[gun pod]]s could also be fitted to the underside of the fuselage. The Harrier was outfitted with updated avionics to replace the basic systems used in the Kestrel;{{refn|Some avionics systems used in the Harrier had been carried over from the cancelled [[BAC TSR-2]], such as the Weapon Aiming Computer.<ref name= 'Jefford 48'>Jefford 2006, p. 48.</ref>|group=N}} a navigational-attack system incorporating an [[inertial navigation system]], originally for the P.1154, was installed and information was presented to the pilot by a [[head-up display]] and a moving map display.<ref name="Mason Harrier p73-6">Mason 1986, pp. 73–76.</ref><ref name="Evans p14,6">Evans 1998, pp. 14, 16.</ref>

The Harrier's VTOL abilities allowed it to be deployed from very small prepared clearings or helipads as well as normal airfields.{{refn|The area needed for a Harrier to comfortably take off was said to be less than a tennis court, while the majority of aircraft required a two-mile-long runway.<ref name= Brown_82>Brown 1970, p. 82.</ref>|group=N}} It was believed that, in a high-intensity conflict, air bases would be vulnerable and likely to be quickly knocked out.{{refn|Experience from the Second World War had made this vulnerability abundantly clear to many Air Force officers around the world; this perception of vulnerability contributed heavily to the interest in and development of VTOL aircraft like the Harrier.<ref name= Jefford_9>Jefford 2005, p. 9.</ref>|group=N}} The capability to scatter Harrier squadrons to dozens of small "alert pads" on the front lines was highly prized by military strategists and the USMC procured the aircraft because of this ability.<ref>Brown 1970, pp. 82–83.</ref>{{refn|Some officers went so far as to deride conventional aircraft, unfavourably comparing to the [[Maginot Line]], as static and highly vulnerable.<ref>Taylor, P.W. [http://www.airpower.maxwell.af.mil/airchronicles/aureview/1977/nov-dec/taylor.html "The Impact of V/STOL on Tactical Air Warfare".] {{Webarchive|url=https://web.archive.org/web/20100815021047/http://www.airpower.maxwell.af.mil/airchronicles/aureview/1977/nov-dec/taylor.html |date=15 August 2010 }} ''Air University Review'', November–December 1977. Retrieved 31 July 2011.</ref>|group=N}} Hawker Siddeley noted that STOL operation provided additional benefits over VTOL operation, saving fuel and allowing the aircraft to carry more ordnance.<ref name= Brown_83>Brown 1970, p. 83.</ref>

{{blockquote|I still don't believe the Harrier. Think of the millions that have been spent on VTO in America and Russia, and quite a bit in Europe, and yet the only vertical take-off aircraft which you can call a success is the Harrier. When I saw the Harrier hovering and flying backwards under control, I reckoned I'd seen everything. And it's not difficult to fly.|[[Thomas Sopwith]]<ref>{{Cite web|url=http://www.flightglobal.com/pdfarchive/view/1979/1979%20-%200033.html|title=camel – harrier – anthony fokker – 1979 – 0033 – Flight Archive}}</ref>}}

The Harrier, while serving for many decades in various forms, has been criticised on multiple issues; in particular a [[List of Harrier jump jet family losses|high accident rate]], though Nordeen notes that several conventional single-engine strike aircraft like the [[Douglas A-4 Skyhawk]] and [[LTV A-7 Corsair II]] had worse accident rates.<ref name= Nordeen_155>Nordeen 2006, p. 155.</ref> The ''[[Los Angeles Times]]'' reported in 2003 that the Harrier "...has amassed the highest major accident rate of any military plane now in service. Forty-five Marines have died in 148 noncombat accidents".<ref>Alan C. Miller and Sack, Kevin. [https://www.latimes.com/la-na-harrier11dec11-story.html "Harrier Crash Renews Calls for an Inquiry."] ''Los Angeles Times'', 11 December 2003. Retrieved 31 July 2011.</ref> Colonel Lee Buland of the USMC declared the maintenance of a Harrier to be a "challenge"; the need to remove the wings before performing most work upon the engine, including engine replacements, meant the Harrier required considerable man-hours in maintenance, more than most aircraft. Buland noted however that the maintenance difficulties were unavoidable in order to create a V/STOL aircraft.<ref name= Nordeen_118>Nordeen 2006, p. 118.</ref>

===Engine===
{{main|Rolls-Royce Pegasus}}
[[File:Aircraft engine RR Pegasus cut-out RH.jpg|thumb|Rolls-Royce Pegasus engine on display, sections have been cut out to provide an internal view|alt=Aircraft engine, partially uncovered as an exhibit]]

The Pegasus turbofan jet engine, developed in tandem with the P.1127 then the Harrier, was designed specifically for V/STOL manoeuvring. [[Bristol Siddeley]] developed it from their earlier conventional [[Bristol Siddeley Orpheus|Orpheus]] turbofan engine as the core with [[Bristol Olympus|Olympus]] compressor blades for the fan. The engine's thrust is directed through the four rotatable nozzles.<ref>Gunston, W. T. [http://www.flightglobal.com/pdfarchive/view/1960/1960%20-%201299.html "Bristol Siddeley's Fans".] ''Flight'', 12 August 1960, pp. 210–211. Retrieved 31 July 2011.</ref> The engine is equipped for [[Water injection (engine)|water injection]] to increase thrust and takeoff performance in hot and high altitude conditions; in normal V/STOL operations the system would be used in landing vertically with a heavy weapons load.<ref name= 'flight pegasus 190'/> The water injection function had originally been added following the input of US Air Force Colonel Bill Chapman, who worked for the Mutual Weapons Development Team.<ref name= Jefford_27>Jefford 2006, p. 27.</ref> Water injection was necessary in order to generate maximum thrust, if only for a limited time, and was typically used during landing, especially in high ambient temperatures.<ref name= Nordeen_118/>

The aircraft was initially powered by the Pegasus 6 engine which was replaced by the more powerful Pegasus 11 during the Harrier GR.1 to GR.3 upgrade process.<ref name= 'flight pegasus 189'/> The primary focus throughout the engine's development was on achieving high performance with as little weight as possible,<ref name= 'flight pegasus 189'>Gunston 1977, p. 189.</ref> tempered by the amount of funding that was available.<ref name= Jefford_39/> Following the Harrier's entry to service the focus switched to improving reliability and extending engine life;<ref name= 'flight pegasus 190'>Gunston 1977, p. 190.</ref> a formal joint US–UK Pegasus Support Program operated for many years and spent a £3-million annual budget to develop engine improvements.<ref name= 'flight pegasus 189'/> Several variants have been released; the latest is the Pegasus 11–61 ([[Mark (designation)|Mk]] 107), which provides {{convert|23800|lb(f)|kN}} of thrust, more than any previous engine.<ref name="RRpeg408">[http://www.rolls-royce.com/Images/pegasus_tcm92-6700.pdf "Pegasus – Power for the Harrier."] {{webarchive|url=https://web.archive.org/web/20110715200732/http://www.rolls-royce.com/Images/pegasus_tcm92-6700.pdf |date=15 July 2011 }} ''Rolls-Royce'', 2004. Retrieved 17 April 2010.</ref>

===Controls and handling===
[[File:Vector-nozzle-sea-harrier-jet-common.jpg|thumb|Thrust vectoring nozzle on a Sea Harrier|alt=Nozzel of a Harrier, used to direct the engine's thrust]]
[[File:Pegasus-engine-diagram.svg|thumb|alt=Nozzle locations|Locations of the four nozzles on the sides of the engine]]

The aircraft is capable of both forward flight where it behaves in the manner of a typical fixed-wing aircraft above its [[Stall (flight)|stall]] speed, as well as [[VTOL]] and [[STOL]] manoeuvres where the traditional [[lift (force)|lift]] and [[Flight control surfaces|control surfaces]] are useless, requiring skills and technical knowledge usually associated with helicopters. Most services demand great aptitude and extensive training for Harrier pilots, as well as experience in piloting both types of aircraft. Trainee pilots are often drawn from highly experienced and skilled helicopter pilots.{{refn|In preparation for flying the Kestrel, pilots of the Tripartite Evaluation Squadron were provided with several hours of helicopter piloting tuition, all of whom agreed on the effort being highly worthwhile preparation.<ref name= Jefford_41/>|group=N}}<ref name= Jefford_41/>

The Harrier has two control elements not found in conventional fixed-wing aircraft: the thrust vector and the [[reaction control system]]. The thrust vector refers to the slant of the four engine nozzles and can be set between 0° (horizontal, pointing directly backwards), for level flight, and 98° (pointing down and slightly forwards). The 90° vector is normally deployed for VTOL manoeuvring. The reaction control is similar to the [[Helicopter flight controls#Cyclic|cyclic control]] of a helicopter, and is achieved by manipulating a control stick forward for horizontal flight, or back for short or vertical takeoffs and landings.<ref>Markman and Holder 2000, pp. 74–77.</ref><ref name=Jenkins_25>Jenkins 1998, p. 25.</ref> Senior RAF officers considered the ability to control the aircraft's vertical flight with just one lever a considerable design success.<ref name= Jefford_42>Jefford 2006, p. 42.</ref>

The wind direction is a critical factor in VTOL manoeuvres, and aircraft face the wind for take-off. For vertical takeoff, the thrust vector is set to 90° and the throttle is brought up to maximum, at which point the aircraft leaves the ground. The throttle is trimmed until a hover state is achieved at the desired altitude.<ref name= Brown_83/> The short-takeoff procedure involves proceeding with normal takeoff and then applying a thrust vector (less than 90°) at a runway speed below normal takeoff speed, usually around {{convert|65|kn|km/h}}. For lower takeoff speeds the thrust vector is greater.<ref name= Jefford_42/> The reaction control system involves the thrusters at key points in the aircraft's fuselage, nose and wingtips. Thrust from the engine can be temporarily syphoned to control and correct the aircraft's pitch and roll during vertical flight.<ref>[http://www.centennialofflight.gov/essay/Theories_of_Flight/control/TH28G9.htm "Hawker Harrier reaction control system"] {{webarchive|url=https://web.archive.org/web/20111014143000/http://www.centennialofflight.gov/essay/Theories_of_Flight/control/TH28G9.htm |date=14 October 2011 }} ''U.S. Centennial of Flight'', 2003. Retrieved 28 August 2011.</ref>

Rotating the vectored thrust nozzles into a forward-facing position during normal flight is called [[vectoring in forward flight]], or "VIFFing". This is a [[dog fight|dog-fighting]] tactic, allowing for more sudden braking and higher turn rates. Braking could cause a chasing aircraft to overshoot and present itself as a target for the Harrier it was chasing, a combat technique formally developed by the USMC for the Harrier in the early 1970s.<ref name=Nordeen_33-4>Nordeen 2006, pp. 33–34.</ref><ref name=spick_382>Spick 2000, pp. 382–383.</ref>

Because of the added learning curve and complex capabilities, the Harrier has been described by pilots as "unforgiving",<ref>Nordeen 2006, p. 60.</ref> with three of the first six prototypes crashing.

===Differences between versions===
The two largest users of the Harrier were the Royal Air Force and the United States Marine Corps (USMC). The exported model of the aircraft operated by the USMC was designated the AV-8A Harrier, which was broadly similar to the RAF's Harrier GR.1.<ref name="Evans p43"/> Changes included the removal of all magnesium components, which corroded quickly at sea, and the integration of American radios and [[identification friend or foe]] (IFF) systems; furthermore the outer pylons, unlike the RAF aircraft, were designed from delivery to be equipped with self-defence [[AIM-9 Sidewinder]] heat-seeking air-to-air missiles.<ref name= Nordeen_31/> Most of the AV-8As had been delivered with the more powerful Pegasus engine used in the GR.3 instead of the one used in the earlier GR.1.<ref name="Evans p43"/> Two-seat Harriers were operated for training purposes; the body was stretched and a taller tail fin added.<ref name="Evans p27-8">Evans 1998, pp. 27–28.</ref> The RAF trained in the T.2 and T.4 versions, while T.4N and T.8 were training versions the Navy's Sea Harrier, with appropriate fittings.<ref name="Evans p67-8">Evans 1998, pp. 67–68, 82.</ref> The US and Spain flew the TAV-8A and TAV-8S, respectively.<ref name="Evans p50">Evans 1998, p. 50.</ref><ref name= Nordeen_14>Nordeen 2006, p. 14.</ref>

All RAF GR.1s and the initial AV-8As were fitted with the Ferranti FE541 inertial navigation/attack suite, but these were replaced in the USMC Harriers by a simpler Interface/Weapon Aiming Computer to aid quick turnaround between missions. The [[Martin-Baker]] ejection seats were also replaced by the [[Stencel SEU-3A]] in the American aircraft.<ref>Jenkins 1998, p. 40.</ref><ref name="Mason Harrier p115-9">Mason 1986, pp. 115–119.</ref> The RAF had their GR.1 aircraft upgraded to the GR.3 standard, which featured improved sensors, a nose-mounted laser tracker, the integration of [[electronic countermeasure]] (ECM) systems and a further upgraded Pegasus Mk 103.<ref name="Evans p31,3"/><ref name="WAPJ6 p54"/> The USMC upgraded their AV-8As to the AV-8C configuration; this programme involved the installation of ECM equipment and adding a new [[inertial navigation]] system to the aircraft's avionics. Substantial changes were the Lift Improvement Devices, to increase VTOL performance; at the same time several airframe components were restored or replaced to extend the life of the aircraft.<ref name= Nordeen_35/> Spain's Harriers, designated AV-8S or VA.1 Matador for the single-seater and TAV-8S or VAE.1 for the two-seater, were almost identical to USMC Harriers differing only in the radios fitted.<ref name="Evans p77-8">Evans 1998, pp. 77–78.</ref>

The Royal Navy's [[Fleet Air Arm]] (FAA) operated a substantially modified variant of the Harrier, the [[British Aerospace Sea Harrier]]. The Sea Harrier was intended for multiple naval roles and was equipped with [[radar]] and Sidewinder missiles for air combat duties as part of fleet [[air defence]].{{refn|While the USMC Harriers had Sidewinder missiles, they still lacked radars.|group=N}} The Sea Harrier was also fitted with navigational aids for carrier landings, modifications to reduce corrosion by seawater and a raised bubble-canopy covered cockpit for better visibility.<ref name ="Bull 120">Bull 2004, p. 120.</ref><ref name=Jenkins_p51>Jenkins 1998, pp. 51–55.</ref> The aircraft were later equipped to use [[AIM-120 AMRAAM]] [[Beyond-visual-range missile|beyond-visual-range]] anti-aircraft missiles and the more advanced Blue Vixen radar for longer range air-to-air combat, as well as [[Sea Eagle missile]]s for conducting anti-ship missions.<ref name= "New Science Harrier 2">[https://books.google.com/books?id=BX7c6gVuyVQC&pg=PA780 "Navy puts more punch in its Harriers".]{{Dead link|date=July 2024 |bot=InternetArchiveBot |fix-attempted=yes }} ''New Scientist'', 98(1362), 16 June 1983, p. 780. Retrieved 31 July 2011.</ref>

The [[McDonnell Douglas AV-8B Harrier II]] is the latest Harrier variant, a second-generation series to replace the first generation of Harrier jets already in service; all the above variants of the Harrier have mainly been retired with the Harrier II taking their place in the RAF, USMC and FAA. In the 1970s the United Kingdom considered two options for replacing their existing Harriers: joining [[McDonnell Douglas]] (MDC) in developing the [[BAE Harrier II]], or the independent development of a "Big Wing" Harrier. This proposal would have increased the wing area from {{convert|200|to|250|ft2|m2|sigfig=2}}, allowing for significant increases in weapons load and internal fuel reserves.<ref>Jefford 2006, pp. 80–81.</ref> The option of cooperation with MDC was chosen in 1982 over the more risky isolated approach.<ref>Nordeen 2006, pp. 66–67.</ref> The original Harrier served as the basis for the [[British Aerospace Sea Harrier]] as it was required to fill the fighter role.{{citation needed|date=March 2024}}

==Operational history==

===Royal Air Force===
The first RAF squadron to be equipped with the Harrier GR.1, [[No. 1 Squadron RAF|No. 1 Squadron]], started to convert to the aircraft at [[RAF Wittering]] in April 1969.<ref name= Jefford_13/><ref name="Mason harrier p84">Mason 1986, p. 84.</ref> An early demonstration of the Harrier's capabilities was the participation of two aircraft in the ''[[Daily Mail]]'' [[Daily Mail Trans-Atlantic Air Race|Transatlantic Air Race]] in May 1969, flying between [[St Pancras railway station]], London and central [[Manhattan]] with the use of aerial refuelling. The overall journey between the [[Post Office Tower]] and [[Empire State Building]] took 6 hours 11 minutes; the Harrier had a flight time of 5 hours 57 minutes.<ref name="Mason 91 p424">Mason 1991, p. 424.</ref><ref>"US Interest in British Harrier Jet". ''Glasgow Herald'', 8 May 1969, p. 11.</ref><ref>{{cite news |date=6 May 1969 |url=https://www.nytimes.com/1969/05/06/archives/briton-sets-pace-in-transocean-race.html |title=Briton Sets Pace in Trans-ocean Race |work=The New York Times |page=93 |access-date=10 February 2025}}</ref> Two Harrier squadrons were established in 1970 at the RAF's air base in [[RAF Wildenrath|Wildenrath]] to be part of its [[RAF Germany|air force in Germany]]; another squadron was formed there two years later. In 1977, these three squadrons were moved forward to the air base at [[RAF Gütersloh|Gütersloh]], closer to the prospective front line in the event of an outbreak of a European war.  One of the squadrons was disbanded and its aircraft distributed between the other two.<ref name="Evans p22-23">Evans 1998, pp. 22–23.</ref>

[[File:Royal Air Force (RAF) Hawker Siddeley Harrier GR3A 'L' (Lima) and 'T' (Tango) of 1453 Flight RAF on the flight-line at RAF Stanley, Falklands, 1984 21.jpg|thumb|A No. 1453 Flight Harrier GR.3 at Stanley Airport in 1984|alt=Harrier at an airfield]]
In RAF service, the Harrier was used in [[close air support]] (CAS), reconnaissance, and other ground-attack roles. The flexibility of the Harrier led to a long-term heavy deployment in [[West Germany]] as a conventional deterrent and potential strike weapon against Soviet aggression; from camouflaged rough bases the Harrier was expected to launch attacks on advancing armour columns from [[East Germany]].<ref name= RAF_Museum/> Harriers were also deployed to bases in Norway and [[Belize]], a former British colony.<ref name=RAF_Museum>[http://www.rafmuseum.org.uk/london/collections/aircraft/bae-harrier-gr3.cfm "BAe Harrier GR3 Aircraft History – Post-World War Two Aircraft".] {{webarchive|url=https://web.archive.org/web/20110105051311/http://www.rafmuseum.org.uk/london/collections/aircraft/bae-harrier-gr3.cfm |date=5 January 2011 }} ''RAF Museum''. Retrieved: 4 March 2011.</ref> No. 1 Squadron was specifically earmarked for Norwegian operations in the event of war, operating as part of [[Allied Forces Northern Europe]]. The Harrier's capabilities were necessary in the [[No. 1417 Flight RAF#British Forces Belize|Belize deployment]], as it was the only RAF combat aircraft capable of safely operating from the airport's short runway;<ref>Jefford 2006, pp. 79–80.</ref> British forces had been stationed in Belize for several years due to tensions over a Guatemalan claim to Belizean territory; the forces were withdrawn in 1993, two years after Guatemala recognized the independence of Belize.<ref>[https://books.google.com/books?id=1tuZQlMu4UsC "Daily report. West Europe, Parts 1–15".] ''United States. Foreign Broadcast Information Service'', March 1993, p. 10. Retrieved 31 July 2011.</ref>

====Falklands War====
In the [[Falklands War]] ({{langx|es|Guerra de las Malvinas}}) in 1982, 10 Harrier GR.3s of No. 1 Squadron operated from the aircraft carrier {{HMS|Hermes|R12|6}}.<ref name= 'max.af.mil'>Duffner, Robert W. [http://www.airpower.maxwell.af.mil/airchronicles/aureview/1984/mar-apr/duffner.html "Conflict In The South Atlantic: The Impact of Air Power."] {{Webarchive|url=https://web.archive.org/web/20100110214537/http://www.airpower.maxwell.af.mil/airchronicles/aureview/1984/mar-apr/duffner.html |date=10 January 2010 }} ''Air University Review,'' March–April 1984. Retrieved 31 July 2011.</ref> As the RAF Harrier GR.3 had not been designed for naval service, the 10 aircraft had to be rapidly modified prior to the departure of the task force. Special sealants against corrosion were applied and a new deck-based inertial guidance aid was devised to allow the RAF Harrier to land on a carrier as easily as the Sea Harrier.<ref name= Braybrook_15/> [[Transponder]]s to guide aircraft back to the carriers during night-time operations were also installed, along with [[Flare (countermeasure)|flares]] and [[Chaff (countermeasure)|chaff]] dispensers.<ref>Jefford 2006, pp. 85–86.</ref>

Due to limited space aboard the aircraft carriers, two requisitioned [[Container ship|merchant container ships]], {{SS|Atlantic Conveyor||2}} and {{SS|Atlantic Causeway||2}}, were modified with temporary flight decks to transport Harrier aircraft and helicopters to the South Atlantic.<ref name='corum'/>

Harrier GR.3s were primarily employed in providing [[close air support]] for ground forces on the Falklands, with a particular emphasis on suppressing Argentine artillery.<ref name='time'>[https://web.archive.org/web/20080416131015/http://www.time.com/time/magazine/article/0,9171,951776-1,00.html "That Magnificent Flying Machine."] ''Time,'' 7 June 1982. Retrieved 31 July 2011.</ref><ref>Kemp, Leslie R. "Close Air Support Today and Tomorrow". ''Air War College, Maxwell AFB,'' May 1989.</ref> Sea Harriers were primarily tasked with conducting [[combat air patrol]]s in response to the threat posed by Argentine aircraft.<ref name='corum'>Corum, James S. [http://www.airpower.maxwell.af.mil/airchronicles/apj/apj02/fal02/corum.html "Argentine Airpower in the Falklands War."] {{Webarchive|url=https://web.archive.org/web/20140102191905/http://www.airpower.maxwell.af.mil/airchronicles/apj/apj02/fal02/corum.html |date=2 January 2014}} ''Air & Space Power Journal,'' 20 August 2002. Retrieved 31 July 2011.</ref> Both Sea Harriers and Harrier GR.3s were employed in ground-attack operations against the airfield and runway at [[Stanley, Falkland Islands|Stanley]].<ref>Jefford 2006, p. 89.</ref>

Had additional Sea Harriers been lost, Harrier GR.3s would have been reassigned to air patrol duties, despite not being designed for air defence operations. Consequently, their outboard weapons pylons were rapidly modified to carry air-to-air [[AIM-9 Sidewinder#1982 Falklands War|Sidewinder missiles]].<ref name=Braybrook_15>Braybrook 1982, p. 15.</ref> Between 10 and 24 May 1982, prior to the British landings in the Falklands, a detachment of three GR.3s was deployed to provide air defence for [[Ascension Island]] until the arrival of three [[McDonnell Douglas F-4 Phantom II|F-4 Phantom IIs]], which subsequently assumed the role.<ref>Freedman 2007, p. 69</ref>

During the conflict, the principal threats to Harrier aircraft were assessed as [[surface-to-air missile|surface-to-air missiles (SAMs)]], [[anti-aircraft artillery]], and [[firearm|small arms fire]], with four Harrier GR.3s and six Sea Harriers lost.<ref>Jefford 2006, pp. 89–90.</ref><ref>Freedman 2007, pp. 788–789.</ref>

{| class="wikitable sortable"
! style="background:#CCCCCC;" | Aircraft type & serial
! style="background:#CCCCCC;" | Pilot
! style="background:#CCCCCC;" | Date
! style="background:#CCCCCC;" | Location
! style="background:#CCCCCC;" | Cause / Weapon
|-
| Sea Harrier XZ450 || Lt Nick Taylor{{KIA}} || 4 May 1982 || [[Goose Green]] area || Shot down by [[GADA 601#Sea Harrier Incident|35mm Oerlikon AA fire]]<ref name="XZ450" />
|-
| Sea Harrier XZ452 || Lt Cdr John Eyton-Jones{{KIA}} || 6 May 1982 || South East of Falklands || Night collision with XZ453 (accident) <ref name="XZ452" />
|-
| Sea Harrier XZ453 || Lt Alan Curtis{{KIA}} || 6 May 1982 || South East of Falklands || Night collision with XZ452 (accident) <ref name="XZ453" />
|-
| Harrier GR.3 XZ972 || Flt‑Lt Jeff Glover || 21 May 1982 || [[Port Howard]], West Falkland || Shot down by [[Blowpipe (missile)#Combat performance|Blowpipe SAM]]<ref name="XZ972" />
|-
| Sea Harrier ZA192 || [https://sama82.org.uk/2023-gor-ip-battgwj Cdr Gordon Batt]{{KIA}} || 23 May 1982 || North East of Falklands || Crashed on take-off (possible mechanical failure) <ref name="ZA192" />
|-
| Harrier GR.3 XZ988 || Sqn Ldr Bob Iveson || 27 May 1982 || Near Goose Green || Hit by [[GADA 601#GR3 Harriers in action|20mm cannon AA fire]]<ref name="XZ988" />
|-
| Sea Harrier ZA174 || Lt Cdr Mike Broadwater || 29 May 1982 || HMS {{HMS|Invincible|R05|2}} flight deck || Slid off deck in bad weather (accident) <ref name="ZA174" />
|-
| Harrier GR.3 XZ963 || Sqn Ldr Jerry Pook || 30 May 1982 || West of Port Stanley || Damaged by small-arms fire, crashed (fuel exhaustion) <ref name="XZ963" />
|-
| Sea Harrier XZ456 || Flt‑Lt Ian Mortimer || 1 June 1982 || South of Stanley airfield || Shot down by [[Roland (missile)|Roland SAM]]<ref name="XZ456" />
|-
| Harrier GR.3 XZ989 || [[Peter Squire|Wg Cdr Peter Squire]] || 8 June 1982 || [[Port San Carlos]] area || Mechanical failure on landing <ref name="XZ989" />
|}

More than 2,000 Harrier [[sortie]]s were flown during the conflict, an average of six sorties per aircraft per day.<ref>Feesey, John D.L. [https://books.google.com/books?id=Zlt7e7nJwNEC "V/STOL: Neither Myth nor Promise – But Fact".] ''Air University Review'', 50(2). Retrieved 6 March 2011.</ref>

====Skyhook and post Falklands deployment====
[[File:BELIZE 90 23.jpg|thumb|An RAF Harrier GR.3 in Belize, 1990|alt=A Harrier stored at an airfield]]

Following the Falklands War, British Aerospace explored the Skyhook, a new technique to operate Harriers from smaller ships. Skyhook would have allowed the launching and landing of Harriers from smaller ships by holding the aircraft in midair by a crane; secondary cranes were to hold weapons for rapid re-arming. This would potentially have saved fuel and allowed for operations in rougher seas.<ref>[https://books.google.com/books?id=h9QDAAAAMBAJ&pg=PA181 "Skyhooks for Harriers".] ''Popular Mechanics'', October 1983, p. 181. Retrieved 31 July 2011.</ref> The system was marketed to foreign customers,{{refn|In the early 1990s, following Japanese interest in acquiring Harriers, Skyhook was suggested as a means to operate onboard their [[helicopter destroyer]]s.<ref>Jacobs, Gordon. "Reporting from the East, Japan continues to emphasis its sea defense forces". ''Jane's Defence Weekly'', 1990, p. 64.</ref>|group=N}} and it was speculated that Skyhook could be applied to large submarines such as the Russian {{sclass2|Typhoon|submarine|4}}, but the system attracted no interest.<ref>Treadwell, Terry. "Submarine Aviation", ''The Putnam Aeronautical Review'', 1991. pp. 46–54.</ref>

The first generation of Harriers did not see further combat with the RAF after the Falklands War, although they continued to serve for years afterwards. As a deterrent against further Argentine invasion attempts, [[No. 1453 Flight RAF]] was deployed to the [[Falkland Islands]] from August 1983 to June 1985.<ref name=Sturtivant123>Sturtivant 2007, p. 123.</ref> However the second generation [[British Aerospace Harrier II|Harrier II]]s saw action in Bosnia, Iraq, and Afghanistan. The first generation Hawker Siddeley airframes were replaced by the improved Harrier II, which had been developed jointly between McDonnell Douglas and British Aerospace.<ref name=Jenkins_88-9>Jenkins 1998, pp. 88–89.</ref>

===United States Marine Corps===
{{Quote box|align=right|width=25%|quote="In my mind the AV-8A Harrier was like the helicopter in Korea. [It] had limited capability, but that's how the first-generation automobile, boat, or other major systems evolved... it brought us into the world of flexible basing and the Marine Corps into the concept of vertical development"|source= Major General [[Joseph T. Anderson|Joe Anderson]].<ref name= Nordeen_38>Nordeen 2006, p. 38.</ref>}}

The United States Marine Corps began showing a significant interest in the aircraft around the time the first RAF Harrier squadron was established in 1969, and this motivated Hawker Siddeley to further develop the aircraft to encourage a purchase.<ref>Wilson, Michael. [http://www.flightglobal.com/pdfarchive/view/1972/1972%20-%202773.html "Designing the Pegasus".] ''Flight International'', 19 October 1972, p. 531. Retrieved 31 July 2011.</ref> Although there were concerns in Congress about multiple coinciding projects in the close air support role,{{refn|These other projects were the [[Lockheed AH-56 Cheyenne]] and the [[Fairchild Republic A-10 Thunderbolt II]].<ref name= Nordeen_29>Nordeen 2006, p. 29.</ref>|group=N}} the Marine Corps were enthusiastic about the Harrier and managed to overcome efforts to obstruct its procurement.<ref>Nordeen 2006, pp. 29–30.</ref>

The Marine Corps accepted its first AV-8A on 6 January 1971, at Dunsfold Aerodrome, England and began testing it at [[Naval Air Station Patuxent River]] on 26 January.<ref>{{cite magazine |last=Patton |first=John M. |date=February 1972|title= 1971 Naval Aviation Review: Year of Change|url=https://www.history.navy.mil/content/dam/nhhc/research/histories/naval-aviation/Naval%20Aviation%20News/1970/pdf/feb72.pdf |magazine=Naval Aviation News |location=Washington D.C. |publisher=Naval Historical Center |page= 12 |access-date=2021-08-01}}</ref>  The AV-8A entered service with the Marine Corps in 1971, replacing other aircraft in the Marines' attack squadrons.<ref>Nordeen 2006, pp. 30–32.</ref> The service became interested in performing ship-borne operations with the Harrier. Admiral [[Elmo Zumwalt]] promoted the concept of a [[Sea Control Ship]], a 15,000-ton light carrier equipped with Harriers and helicopters, to supplement the larger aircraft carriers of the [[US Navy]]. An amphibious assault ship, {{USS|Guam|LPH-9|6}}, was converted into the ''Interim Sea Control Ship'' and operated as such between 1971 and 1973 with the purpose of studying the limits and possible obstacles for operating such a vessel.<ref name= Nordeen_33>Nordeen 2006, p. 33.</ref><ref>Baitis, A. E. and Dennis A. Woolaver. [http://oai.dtic.mil/oai/oai?verb=getRecord&metadataPrefix=html&identifier=ADA032198 "Trial Results of Ship Motions and Their Influence on Aircraft Operations for ISCS Guam".] {{Webarchive|url=https://web.archive.org/web/20140427005956/http://oai.dtic.mil/oai/oai?verb=getRecord&metadataPrefix=html&identifier=ADA032198 |date=27 April 2014 }} ''David W. Taylor Naval Ship Research and Development Center, Bethesda, Maryland,'' December 1975. Retrieved 31 July 2011.</ref> Since then the Sea Control Ship concept has been subject to periodic re-examinations and studies, often in the light of budget cuts and questions over the use of [[supercarrier]]s.<ref>Canaday, John L. [http://oai.dtic.mil/oai/oai?verb=getRecord&metadataPrefix=html&identifier=ADA227420 "The Small Aircraft Carrier: A Re-Evaluation of the Sea Control Ship".] {{Webarchive|url=https://web.archive.org/web/20140426235015/http://oai.dtic.mil/oai/oai?verb=getRecord&metadataPrefix=html&identifier=ADA227420 |date=26 April 2014 }} ''Army Command and General Staff College, Fort Leavenworth,'' 1 June 1990. Retrieved 31 July 2011.</ref><ref>Cruz, Yniol A. [http://oai.dtic.mil/oai/oai?verb=getRecord&metadataPrefix=html&identifier=ADA483634 "CV or Not to Be? Alternatives to U.S. Sea-Based Air Power".] {{Webarchive|url=https://web.archive.org/web/20140426234615/http://oai.dtic.mil/oai/oai?verb=getRecord&metadataPrefix=html&identifier=ADA483634 |date=26 April 2014 }} ''Naval Postgraduate School, Monterey, California,'' June 2008. Retrieved 31 July 2011.</ref>{{refn|Spain would adapt the American [[Sea Control Ship]] concept with the addition of a ski jump, launching the vessel as the {{ship|Spanish aircraft carrier|Principe de Asturias||2}}, which carried AV-8S Matador Harriers.<ref>Friedman 1983, p. 357.</ref>|group=N}}

[[File:AV-8As VMA-513 in flight 1974.JPEG|thumb|A pair of USMC AV-8A from ''VMA-513'' in formation flight in 1974|alt=Two Harriers flying]]
Other exercises were performed to demonstrate the AV-8A's suitability for operating from various amphibious assault ships and aircraft carriers, including a deployment of 14 Harriers aboard {{USS|Franklin D. Roosevelt|CV-42|6}} for six months in 1976.<ref name= Nordeen_33/> The tests showed, amongst other things, that the Harrier was capable of performing in weather where conventional carrier aircraft could not.<ref name= Nordeen_33/> In support of naval operations, the USMC devised and studied several methods to further integrate the Harrier. One result was ''Arapaho'', a stand-by system to rapidly convert civilian cargo ships into seagoing platforms for operating and maintaining a handful of Harriers, to be used to augment the number of available ships to deploy upon.<ref>Miller and Miller 1986, p. 71.</ref>{{refn|Arapaho would have been operationally similar to the British container ship {{SS|Atlantic Conveyor||2}}, which not only transported Harriers but was modified to enable crude flight operations as well.|group=N}}

When the reactivation of the {{sclass|Iowa|battleship}}s was under consideration, a radical design for a battleship-carrier hybrid emerged that would have replaced the ship's rear turret with a flight deck, complete with a hangar and two ski jumps, for operating several Harriers. However, the USMC considered the need for [[naval gunfire support]] to be a greater priority than additional platforms for carrier operations, while the cost and delay associated with such elaborate conversions was significant, and the concept was dropped.<ref>Burr and Bull 2010, pp. 37–38, 40.</ref><ref name="Hybrid p159-163">Layman and McLaughlin 1991, pp. 159–163.</ref>

The Marines Corps' concept for deploying the Harriers in a land-based expeditionary role focused on aggressive speed. Harrier forward bases and light maintenance facilities were to be set up in under 24 hours on any prospective battle area. The forward bases, containing one to four aircraft, were to be located {{convert|20|mi|km}} from the forward edge of battle (FEBA), while a more established permanent airbase would be located around {{convert|50|mi|km}} from the FEBA.<ref name= 'bingham'/>{{refn|Dispersed forward bases were heavily reliant on effective transportation to refuel and rearm the Harriers; possessing a large fleet of air transports, helicopters or ground vehicles to support such operations was identified as crucial by USMC senior officers. It was planned that supplies would to be regularly ferried by [[Sikorsky CH-53E Super Stallion]]s from main bases to all forward bases.<ref name= 'bingham'/>|group=N}} The close proximity of forward bases allowed for a far greater sortie rate and reduced fuel consumption.<ref name= 'bingham'/>

[[File:KC-130R VMGR-252 refueling Harriers 1978.JPEG|thumb|A pair of USMC AV-8A Harriers refuelling from a [[Lockheed Martin KC-130]] tanker|alt=Harriers flying behind a tanker aircraft]]
The AV-8A's abilities in air-to-air combat were tested by the Marine Corps by conducting mock dogfights with McDonnell Douglas F-4 Phantom IIs; these exercises trained pilots to use the vectoring-in-forward-flight (VIFF) capability to outmanoeuvre their opponents and showed that the Harriers could act as effective air-to-air fighters at close range.<ref name=Nordeen_33-4/> The success of Harrier operations countered scepticism of V/STOL aircraft, which had been judged to be expensive failures in the past.<ref>Congress 1979, pp. 8, 166, 236.</ref> Marine Corps officers became convinced of the military advantages of the Harrier and pursued extensive development of the aircraft.<ref>Gilliland, Woody F. [http://oai.dtic.mil/oai/oai?verb=getRecord&metadataPrefix=html&identifier=ADA058386 "The Continuing Requirement for V/STOL in the Close Air Support Role".] {{Webarchive|url=https://web.archive.org/web/20131014175242/http://oai.dtic.mil/oai/oai?verb=getRecord&metadataPrefix=html&identifier=ADA058386 |date=14 October 2013 }} ''oai.dtic.mil'', 9 June 1978. Retrieved 31 July 2011.</ref>

Starting in 1979, the USMC began upgrading their AV-8As to the AV-8C configuration—the work focused mainly on extending useful service lives and improving VTOL performance.<ref name= Nordeen_35>Nordeen 2006, p. 35.</ref> The AV-8C and the remaining AV-8A Harriers were retired by 1987.<ref>Jenkins 1998, p. 44.</ref> These were replaced by the Harrier II, designated as the AV-8B, which was introduced into service in 1985.<ref name= Nordeen_36>Nordeen 2006, pp. 36, 61.</ref> The performance of the Harrier in USMC service led to calls for the [[United States Air Force]] to procure Harrier IIs in addition to the USMC's own plans,<ref name= 'bingham'>Bingham, Price T. [http://www.airpower.maxwell.af.mil/airchronicles/aureview/1985/jan-feb/bingham.html "Improving Force Flexibility Through V/STOL".] {{Webarchive|url=https://web.archive.org/web/20100815062331/http://www.airpower.maxwell.af.mil/airchronicles/aureview/1985/jan-feb/bingham.html |date=15 August 2010 }} ''Air University Review'', January–February 1985. Retrieved 31 July 2011.</ref> but these never resulted in Air Force orders. Since the late 1990s, the AV-8B has been slated to be replaced by the F-35B variant of the [[Lockheed Martin F-35 Lightning II]], a more modern V/STOL jet aircraft.<ref>Eden 2004, p.&nbsp;274.</ref>

Like the next generation AV-8Bs, nevertheless, the AV-8A/C Harriers suffered many accidents, with around 40 aircraft lost and some 30 pilots killed during the 1970s and 1980s.<ref>[https://www.latimes.com/archives/la-xpm-2002-dec-17-na-wall17-story.html "More Than a Few Good Men."] ''<Los Angeles Times''. Retrieved: 26 January 2016.</ref>

===Other operators===
[[File:DN-ST-87-06219.JPEG|thumb|A Spanish Navy AV-8S Matador aircraft|alt=A parked Harrier]]

Due to the Harrier's unique characteristics it attracted a large amount of interest from other nations, often as attempts to make their own V/STOL jets were unsuccessful, such as in the cases of the American [[XV-4 Hummingbird]] and the German [[VFW VAK 191B]].{{refn|Kevin Brown of ''Popular Mechanics'' described the development efforts of performance vertical aircraft as having "long eluded the best efforts of the aviation industry", and noted that several American efforts had been "spectacularly unsuccessful".<ref name= Brown_81/>|group=N}} Operations by the USMC aboard {{USS|Nassau|LHA-4|6}} in 1981 and by British Harriers and Sea Harriers in the Falklands War proved that the aircraft was highly effective in combat. These operations also demonstrated that "Harrier Carriers" provided a powerful presence at sea without the expense of big deck carriers.<ref>Nordeen 2006, pp. 36–38.</ref>{{refn|Politically, the British government had decided not to use aircraft carriers after the 1960s, due to the costs involved. The {{sclass|Invincible|aircraft carrier|1}}s had been developed under the official guise of being an anti-submarine Through Deck Cruiser, but the approved development of the Sea Harrier and the addition of [[ski-jump]]s to the design enabled ships of the ''Invincible'' class to perform as [[light aircraft carrier]]s.<ref>Bishop and Chant 2004, p. 24.</ref><ref>Fozard, John. [http://www.emeraldinsight.com/journals.htm?articleid=1683341&show=abstract "Harrier: Catalyst for Change in Naval Airpower".] ''Aircraft Engineering and Aerospace Technology'', 56 (12), 1984.</ref>|group=N}}

Following the display of Harrier operations from small carriers, the navies of Spain and later Thailand bought the Harrier for use as their main carrier-based fixed-wing aircraft.{{refn|Italy also became an operator of a "Harrier Carrier", but they only operated the second-generation [[McDonnell Douglas AV-8B Harrier II]].<ref name= Nordeen_98>Nordeen 2006, p. 98.</ref>|group=N}} Spain's purchase of Harriers was complicated by long-standing political friction between the British and Spanish governments of the era; even though the Harriers were manufactured in the UK they were sold to Spain with the US acting as an intermediary.<ref>[https://news.google.com/newspapers?id=2fojAAAAIBAJ&sjid=fX4EAAAAIBAJ&pg=6676,3947999&dq=arms+sale+to+spain+irks+wilson&hl=en "Arms Sale to Spain Irks Wilson".] {{Webarchive|url=https://web.archive.org/web/20150928074910/https://news.google.com/newspapers?id=2fojAAAAIBAJ&sjid=fX4EAAAAIBAJ&pg=6676,3947999&dq=arms+sale+to+spain+irks+wilson&hl=en |date=28 September 2015 }} ''The New York Times'', 22 August 1973.</ref> During tests in November 1972, the British pilot [[John Farley (pilot)|John Farley]] showed that the wooden deck of their aircraft carrier {{ship|Spanish aircraft carrier|Dédalo||2}} was able to withstand the temperature of the gases generated by the Harrier.{{citation needed|date=January 2016}}  Since 1976, the Spanish Navy operated the AV-8S Matador from their aircraft carrier ''Dédalo''; the aircraft provided both air defence and strike capabilities for the Spanish fleet.<ref>Nordeen 2006, p. 64.</ref> Spain later purchased five Harriers directly from the British government mainly to replace losses.<ref name=Jenkins_48-9>Jenkins 1998, pp. 48–49.</ref>

Spain sold seven single-seat and two twin-seat Harriers to Thailand in 1998.<ref name=Jenkins_48-9/><ref name= Nordeen_183>Nordeen 2006, p. 183.</ref>{{refn|Spain sold its AV-8S Matadors following the introduction of new second generation Harrier II aircraft; as a result the Harrier I models were outdated and no longer required.<ref name= Nordeen_162>Nordeen 2006, p. 162.</ref>|group=N}}  The Royal Thai Navy's AV-8S Matadors were delivered as part of the air wing deployed on the new light aircraft carrier {{ship|HTMS|Chakri Naruebet||6}}.<ref name= Nordeen_164>Nordeen 2006, p. 164.</ref> The Thai Navy had from the start significant logistical problems keeping the Harriers operational due to a shortage of funds for spare parts and equipment, leaving only a few Harriers serviceable at a time. In 1999, two years after being delivered, only one airframe was in airworthy condition.<ref>Carpenter & Wiencek, Asian Security Handbook 2000, p. 302.</ref><ref>[http://www.flightglobal.com/articles/1997/11/05/28894/harrier-creates-challenges-for-royal-thai-navy.html "Harrier creates challenges for Royal Thai Navy".] ''Flight International'', 5 November 1997.</ref> Around 2003, Thailand considered acquiring former Royal Navy Sea Harriers, which were more suitable for maritime operations and better equipped for air defence, to replace their AV-8S Harriers; this investigation did not progress to a purchase.<ref>Fullbrook, David. [http://www.flightglobal.com/articles/2003/04/15/164162/thai-navy-considers-ex-rn-sea-harriers-to-replace-av-8s.html "Thai navy considers ex-RN Sea Harriers to replace AV-8s".] ''Flight International'', 15 April 2003.</ref> The last first-generation Harriers were retired by Thailand in 2006.<ref>Cooper, Peter.[http://pacificwingsmagazine.com/2011/03/08/end-of-a-legend%E2%80%94harrier-farewell/ "End of a Legend—Harrier Farewell"] {{webarchive|url=https://archive.today/20120714183820/http://pacificwingsmagazine.com/2011/03/08/end-of-a-legend%E2%80%94harrier-farewell/ |date=14 July 2012 }}. Pacific Wings Magazine, 8 March 2011.</ref>
{{clear}}

=== Potential operators ===
Some countries almost purchased Harriers. British Aerospace held talks with Argentina, Australia, Brazil, China, Switzerland and Japan.

==== Argentina ====
When the Argentinian Navy looked for newer fighters in 1968 the US government only offered old A-4A planes instead of the A-4Fs Argentina wanted. Argentina contacted the British government in 1969 and expressed interest in buying from six to twelve Harrier GR.1s. In 1969 the Argentinian Navy received its second carrier, [[ARA Veinticinco de Mayo (V-2)|ARA ''Veinticinco de Mayo'']], from the Netherlands. On her voyage home, Hawker Siddeley demonstrated a RAF Harrier GR.Mk.1 (XV757) but Argentina opted for the A-4Q Skyhawk instead. There were several problems to supply Argentina with Harrier jets and engines that prevented the deal from being closed, and when the US learned of the Harrier negotiations they quickly offered a better deal to Argentina. Some years later, before the 1982 war, British officials again offered Argentina an aircraft carrier and Sea Harrier aircraft.<ref>{{Cite web|url=https://www.zona-militar.com/2018/01/19/dia-harrier-ingles-se-poso-la-cubierta-portaaviones-argentino/|title=El día que un Harrier inglés se posó sobre la cubierta de un portaaviones argentino|first=Jennifer P.|last=Olivera|date=19 January 2018}}</ref><ref>{{Cite news|url=https://www.telegraph.co.uk/active/9767830/British-officials-wanted-to-sell-arms-to-Argentina-before-invasion.html|archive-url=https://web.archive.org/web/20130102130523/http://www.telegraph.co.uk/active/9767830/British-officials-wanted-to-sell-arms-to-Argentina-before-invasion.html|url-status=dead|archive-date=2 January 2013|title=British officials wanted to sell arms to Argentina before invasion|date=28 December 2012|via=www.telegraph.co.uk}}</ref>

==== Australia ====
Planning for a ''HMAS Melbourne'' aircraft carrier replacement began in 1981. After considering American, Italian, and Spanish designs, the Australian government accepted a British offer to sell {{HMS|Invincible|R05|6}}, which would be operated with Harriers and helicopters.<ref name=Wright167/><ref name=Hobbs9/><ref>Jones, in ''The Royal Australian Navy'', pp. 226–7</ref> However, the Royal Navy withdrew the offer after the Falklands War, and the [[1983 Australian federal election|1983 election]] of the [[Australian Labor Party]] led to the cancellation of plans to replace ''Melbourne''.<ref name=Wright167>Wright, ''Australian Carrier Decisions'', p. 167</ref><ref name=Hobbs9>Hobbs, ''HMAS Melbourne – 25 Years On'', p. 9</ref>

==== China ====
As early as 1972 the Chinese government started negotiating a purchase of up to 200 Harrier aircraft. Due to internal political issues, China put the negotiations on hold. In 1977 Li Chiang, the Chinese Minister of Foreign Trade, visited the UK and British Aerospace organised a Harrier flying demonstration. In November 1978, the Harrier-demonstration was repeated for the Chinese Vice-Premier Wang Chen during his UK visit. The Harrier deal would have meant British Government ignored United States laws that prohibited such sales to communist countries. British [[Prime Minister]] [[James Callaghan]] noted significant hostility from the USSR over the sales bid.<ref>Haddon, Katherine. [https://web.archive.org/web/20120907215947/http://www.chinapost.com.tw/international/europe/2008/12/30/189834/British-bid.htm "British bid to sell China arms provoked Soviet ire: secret files."] ''China Post'', 30 December 2008. Retrieved 23 March 2010.</ref><ref>{{citation|jstor=30173489|title=The Harrier Jump-Jet and Sino-British Relations|journal=Asian Affairs|volume=8|issue=4|pages=227–250|last1=Crane|first1=David|year=1981|doi=10.1080/00927678.1981.10553811}}</ref> In spite of that, British Aerospace convinced China that the Harrier was an effective close-support fighter and was good enough to act in a defensive role. In 1979, the Anglo-Sino deal was nearly finalised before being cancelled by the [[Sino-Vietnamese War]].<ref>{{Cite journal|url=https://www.academia.edu/8059397|title=The Modernisation of China and the Harrier 'Jump-Jet': Sino-British relations during China's 'opening-up' to the World|first=Edward|last=Harvey|journal=The Berlin Historical Review: 1 (2013)|date=December 2013|via=www.academia.edu}}</ref><ref>{{Cite journal|title=The Harrier Jump-Jet and Sino-British Relations|first=David|last=Crane|date=3 January 1981|journal=Asian Affairs: An American Review|volume=8|issue=4|pages=227–250|doi=10.1080/00927678.1981.10553811}}</ref>

==== Switzerland ====
The Swiss Air Force was interested in purchasing some Harriers as its doctrine was to operate in hidden and dispersed locations during the Cold War. British Aerospace held talks with Switzerland offering AV-8s to replace [[de Havilland Venom]]s. A demonstration was made by test pilot John Farley and XV742/G-VSTO in 1971.<ref>{{Cite web|url=https://migflug.com/jetflights/hidden-swiss-air-force/|title=The hidden Air Force|date=12 September 2014|website=MiGFlug.com Blog}}</ref>

==Variants==
{{main|List of Harrier variants}}
[[File:DF-ST-85-13457.JPEG|thumb|A Royal Air Force Harrier GR.3 aircraft parked on the flight line during Air Fete '84 at [[RAF Mildenhall]].|alt=An aircraft on display]]

;Harrier GR.1, GR.1A, GR.3: Single-seat versions for the RAF.<ref name="Evans p31,3">Evans 1998, pp. 31, 33.</ref><ref name="WAPJ6 p54">Jackson 1991, p. 54.</ref><ref name="WAPJ6 p51">Jackson 1991, p. 51.</ref> The RAF ordered 118 of the GR.1/GR.3 series,<ref name="JAWA88 p290">Taylor 1988, p. 290.</ref> with the last production aircraft delivery in December 1986.<ref name="Evans p174,6">Evans 1998, pp. 174, 176.</ref> 122 built.<ref name= "Mason prodnums">Mason 1991, pp. 421–432.</ref>
;AV-8A, AV-8C Harrier: Single-seat versions for the US Marine Corps.<ref name="Evans p43">Evans 1998, p. 43.</ref> The USMC ordered 102 AV-8As (company designation: Harrier Mk. 50).<ref name="JAWA88 p290"/> The AV-8C was an upgrade to the AV-8A.<ref name= Nordeen_35/> 110 built.<ref name= "Mason prodnums"/>
;AV-8S Matador : Export version of the AV-8A Harrier for the [[Spanish Navy]], who designated them as VA.1 Matador;<ref name= Nordeen_14/> later sold to the Royal Thai Navy as the '''B.KhL.1''' ({{langx|th|บ.ขล.๑}}).<ref name=":0">{{Cite web |title=Thai Military Aircraft Designations |url=https://designation-systems.net/non-us/thailand.html |access-date=2025-03-20 |website=designation-systems.net}}</ref> 10 built.<ref name= "Mason prodnums"/>
;Harrier T.2, T.2A, T.4, T.4A: Two-seat training versions for the RAF, with a stretched body and taller tail fin.<ref name="Evans p27-8"/> 25 built.<ref name= "Mason prodnums"/>
;Harrier T.4N, T.8, T.60: Two-seat training versions for the Royal Navy and Indian Navy with avionics based on the Sea Harrier.<ref name="Evans p67-8"/>
;TAV-8A Harrier : Two-seat training version for the USMC, powered by a Pegasus Mk 103.<ref name="Evans p50"/>
;TAV-8S Matador: Two-seat training version for the Spanish Navy and later sold to the Royal Thai Navy as the '''B.KhL.1A''' ({{langx|th|บ.ขล.๑ก}}).<ref name= Nordeen_14/><ref name=":0" />

==Operators==
{{main|List of Harrier operators}}
[[File:DM-SC-82-07687.JPEG|thumb|A USMC TAV-8A Harrier from ''VMAT-203'' on the flight line|alt=An aircraft ready for takeoff]]
;{{ESP}}
* [[Spanish Navy]]<ref>{{cite web|url=https://www.flightglobal.com/pdfarchive/view/1987/1987%20-%202540.html|title= World Air Forces 1987 pg. 90 |publisher= flightglobal.com |access-date=12 May 2019}}</ref>
;{{THA}}
* [[Royal Thai Navy]]<ref>{{cite web|url=https://www.flightglobal.com/pdfarchive/view/2000/2000-1%20-%201999.html|title= World Air Forces 2000 pg. 91 |publisher= flightglobal.com |access-date=12 May 2019}}</ref>
;{{UK}}
* [[Royal Air Force]]<ref>{{cite web|url=https://www.flightglobal.com/pdfarchive/view/1981/1981%20-%202515.html|title= World Air Forces 1981 pg. 343 |publisher= flightglobal.com |access-date=12 May 2019}}</ref>
* [[Royal Navy]]<ref>{{cite web|url=https://www.flightglobal.com/pdfarchive/view/1981/1981%20-%202516.html|title= World Air Forces 1981 pg. 344 |publisher= flightglobal.com |access-date=12 May 2019}}</ref>
;{{USA}}
* [[United States Marine Corps]]<ref>{{cite web|url=https://www.flightglobal.com/pdfarchive/view/1981/1981%20-%202554.html |title= World Air Forces 1981 pg. 382 |publisher= flightglobal.com |access-date=12 May 2019}}</ref>

==Aircraft on display==
[[File:Harrier-XV798-0524.jpg|thumb|Former Harrier GR.1 that crashed in 1971 and used as a static engine test bed by Rolls-Royce, seen on display at the Bristol Aero Collection, Kemble, England|alt=Museum display of a Harrier]]

===Belize===
;GR.3
* ZD669 – [[Philip S. W. Goldson International Airport]], [[Ladyville, Belize]]{{citation needed|date=October 2024}}
[[No. 1417 Flight RAF]]

===Canada===
;AV-8A
* 158966 – [[Canada Aviation and Space Museum]], [[Ottawa, Ontario]]<ref>[http://www.aviation.technomuses.ca/collections/artifacts/aircraft/HawkerSiddeleyAV-8AHarrier/ "AV-8 Harrier/158966."] {{Webarchive|url=https://web.archive.org/web/20131016234708/http://www.aviation.technomuses.ca/collections/artifacts/aircraft/HawkerSiddeleyAV-8AHarrier/ |date=16 October 2013 }} ''Canada Aviation and Space Museum''. Retrieved: 4 April 2013.</ref>

===China===
[[File:Harrier in Beijing Air and Space Museum.jpg|thumb|right|alt=Harrier GR3 in Beijing Air and Space Museum|Harrier GR3 in Beijing Air and Space Museum]]
;GR.3
* XZ965 – [[Beijing Air and Space Museum]]<ref>{{Cite web|url=https://abpic.co.uk/pictures/view/1164653|title=Hawker Siddeley Harrier GR3, XZ965 / 712201, Beijing University Aviation Museum|first=Derek|last=Gaynor|website=abpic.co.uk}}</ref>

===Germany===
;GR.1
* XV278 – [[Luftwaffenmuseum der Bundeswehr]], [[Gatow]]<ref>[http://www.luftwaffenmuseum.com/index.php?option=com_content&task=view&id=64&Itemid=178 "GR.1 Harrier/XV278."] ''Luftwaffenmuseum der Bundeswehr''. Retrieved: 4 April 2013.</ref>
;GR.3
*XZ996 – [[Flugplatzmuseum Gütersloh]] at [[Gütersloh]]<ref>{{cite web | url=https://aerialvisuals.ca/AirframeDossier.php?Serial=21223 | title=Aerial Visuals - Airframe Dossier - Hawker Siddeley Harrier GR.3, s/N XZ996 RAF, c/N 712219 }}</ref>
;GR.3
* XZ998 – [[Flugausstellung Hermeskeil]] at [[Hermeskeil]]<ref>[http://www.flugausstellung.de/flugzeuge.html "GR.3 Harrier/XZ998."] {{webarchive|url=https://web.archive.org/web/20151231084758/http://www.flugausstellung.de/flugzeuge.html |date=31 December 2015 }} ''Flugzeuge Liste aller Flugzeuge in der Ausstellung''. Retrieved: 3 March 2011.</ref>
;GR.3
ZD670 cockpit section – [[Flugplatzmuseum Gütersloh]] at [[Gütersloh]]{{citation needed|date=October 2024}}

===Poland===
;GR.3
* XW919 – [[Polish Aviation Museum]], [[Kraków, Poland]]{{citation needed|date=October 2024}}

===New Zealand===
;GR.3
* XZ129 – Ashburton Aviation Museum, [[Ashburton, New Zealand]]<ref>[http://www.ashburtondistrict.co.nz/newzealand/product/?product=ashburton-aviation-museum "GR.3 Harrier/XZ129."] ''Ashburton Aviation Museum''. Retrieved: 6 March 2011.</ref>

===Thailand===
[[File:AV-8S Royal Thai navy.jpg|thumb|AV-8S Royal Thai Navy in Royal Thai Air Force Museum]]
;AV-8S
* 3109 – [[Royal Thai Air Force Museum]]{{citation needed|date=October 2024}}

===United Kingdom===
[[File:Brooklands Museum Harrier.jpg |thumb|GR.1 XV741 at the Brooklands Museum, used in the 1969 [[Daily Mail Trans-Atlantic Air Race]]<ref name="XV741" />]]
;GR.1
* XV277 – [[National Museum of Flight]], [[East Fortune]]<ref>[http://www.nms.ac.uk/our_museums/museum_of_flight/things_to_see_and_do/aircraft/aircraft_location.aspx "GR.1 Harrier/XV277."] {{webarchive|url=https://web.archive.org/web/20130327045756/http://www.nms.ac.uk/our_museums/museum_of_flight/things_to_see_and_do/aircraft/aircraft_location.aspx |date=27 March 2013 }} ''National Museum of Flight''. Retrieved: 4 April 2013.</ref>
* XV281 (under restoration) – [[South Yorkshire Aircraft Museum]], [[Doncaster, South Yorkshire]]{{citation needed|date=October 2024}}
* XV741 – [[Brooklands Museum]], [[Surrey]]<ref name="XV741">{{cite web |title=Hawker Harrier GR.1 XV741 |url=https://www.brooklandsmuseum.com/explore/heritage-and-collection/our-collection/hawker-harrier-gr1 |website=Brooklands Museum |access-date=16 August 2021 |archive-date=17 January 2022 |archive-url=https://web.archive.org/web/20220117205745/https://www.brooklandsmuseum.com/explore/heritage-and-collection/our-collection/hawker-harrier-gr1 |url-status=dead }}</ref>

;GR.3
* XV744 – [[Tangmere Military Aviation Museum]], Chichester, West Sussex<ref>[http://www.tangmere-museum.org.uk/museum-aircraft/hawker-siddeley-harrier-gr3 "GR.3 Harrier/XV774."] {{Webarchive|url=https://web.archive.org/web/20150222020838/http://www.tangmere-museum.org.uk/museum-aircraft/hawker-siddeley-harrier-gr3 |date=22 February 2015 }} ''Tangmere Aviation Museum''. Retrieved: 8 May 2013.</ref>
* XV748 – [[Yorkshire Air Museum]], [[Elvington, City of York|Elvington]]<ref>[http://www.yorkshireairmuseum.org/exhibits/aircraft-exhibits/post-world-war-ii-aircraft/hawker-harrier-gr3 "GR.3 Harrier/XV748."] {{Webarchive|url=https://web.archive.org/web/20130729005036/http://www.yorkshireairmuseum.org/exhibits/aircraft-exhibits/post-world-war-ii-aircraft/hawker-harrier-gr3 |date=29 July 2013 }} ''Yorkshire Air Museum''. Retrieved: 4 April 2013.</ref>
* XV751 – [[Gatwick Aviation Museum]], [[Surrey]]<ref>[http://www.gatwick-aviation-museum.co.uk/harrier/harrier.html "GR.3 Harrier/XV751."] {{Webarchive|url=https://web.archive.org/web/20140531035327/http://www.gatwick-aviation-museum.co.uk/harrier/harrier.html |date=31 May 2014 }} ''Gatwick Aviation Museum''. Retrieved: 4 April 2013.</ref>
* XV752 – [[South Yorkshire Aircraft Museum]], [[Doncaster, South Yorkshire]]<ref>{{Cite web|url=http://www.southyorkshireaircraftmuseum.org.uk/#!aircraftlist/c8t2|title=South Yorkshire Aircraft Museum|website=South Yorkshire Aircraft Museum|access-date=1 May 2016}}</ref>
* XV753 – [[Classic Air Force]], St Mawgan, Newquay, Cornwall<ref>[http://www.classicairforce.com/harrier-info"] {{webarchive|url=https://web.archive.org/web/20150409140618/http://www.classicairforce.com/harrier-info |date=9 April 2015 }} ''Classic Air Force Museum, Newquay''.</ref>
* XV779 – [[RAF Wittering]] (Gate Guardian)<ref>[http://warbirdregistry.org/jetregistry/harrier-xv779.html "GR.3 Harrier/XV779."] ''Warbird Registry''. Retrieved: 4 April 2013.</ref>
* XZ133 – [[Imperial War Museum]], [[Duxford]]<ref>[http://www.iwm.org.uk/sites/default/files/public-document/IWMDuxford_Aircraft_Vehicles_List.pdf "GR.3 Harrier/XZ133."] {{Webarchive|url=https://web.archive.org/web/20120624145959/http://www.iwm.org.uk/sites/default/files/public-document/IWMDuxford_Aircraft_Vehicles_List.pdf |date=24 June 2012 }} ''Imperial War Museum''. Retrieved: 4 April 2013.</ref>
* XZ964 – [[Royal Engineers Museum]], Gillingham, Kent<ref>[http://www.re-museum.co.uk Royal Engineers Museum]</ref>
* XZ968 – [[Muckleburgh Collection]], [[Norfolk]]<ref>[http://www.muckleburgh.co.uk/the-collection.htm "GR.3 Harrier/XZ968."] {{webarchive|url=https://web.archive.org/web/20130810104430/http://muckleburgh.co.uk/the-collection.htm |date=10 August 2013 }} ''Muckleburgh Collection''. Retrieved: 4 April 2013.</ref>
* XZ997 – [[Royal Air Force Museum London]], [[Hendon]]<ref>[http://www.rafmuseum.org.uk/research/collections/bae-harrier-gr3/ "GR.3 Harrier/XZ997."] {{Webarchive|url=https://web.archive.org/web/20140924104523/http://www.rafmuseum.org.uk/research/collections/bae-harrier-gr3/ |date=24 September 2014 }} ''RAF Museum''. Retrieved: 4 April 2013.</ref>
* XZ971 – [[MoD Donnington]], Telford<ref>{{cite web |title=Hawker Siddeley Harrier GR3 |url=https://abpic.co.uk/pictures/view/1121995 |website=ABPic |access-date=20 July 2023}}</ref>
* ZD667 – Bentwaters Cold War Museum, [[Suffolk]]<ref>{{Cite web|url=https://www.bcwm.org.uk/museum-aircraft-vehicles/|title=Museum Aircraft & Vehicles – BCWM|access-date=1 April 2022|archive-date=3 March 2022|archive-url=https://web.archive.org/web/20220303093931/https://www.bcwm.org.uk/museum-aircraft-vehicles/|url-status=dead}}</ref>
;Mk.52 G-VTOL
* ZA250 – [[Brooklands Museum]], [[Surrey]]<ref>[http://www.brooklandsmuseum.com/index.php?/explore/aircraft-gliders-cockpit-sections/ "MK52 Harrier/ZA250."] {{Webarchive|url=https://web.archive.org/web/20160428164504/http://www.brooklandsmuseum.com/index.php?/explore/aircraft-gliders-cockpit-sections/ |date=28 April 2016 }} ''Brooklands Museum''. Retrieved: 4 April 2013.</ref>
;T.2
* XW269 – [[Caernarfon Airworld Aviation Museum]], [[Gwynedd]]{{citation needed|date=October 2024}}
;T.4
* XW934 – [[Farnborough Air Sciences Trust]], [[Farnborough, Hampshire]]<ref>[http://www.airsciences.org.uk/aircraft.html "T.4 Harrier/XW934."] {{Webarchive|url=https://web.archive.org/web/20141126155805/http://www.airsciences.org.uk/aircraft.html |date=26 November 2014 }} ''Farnborough Air Sciences Trust''. Retrieved: 4 April 2013.</ref>
* XW268 – [[Coventry University]], Engineering and computing building, [[Coventry]], West Midlands<ref>{{Cite web |url=https://www.coventry.ac.uk/study-at-coventry/undergraduate-study/undergraduate-subjects/aerospace-engineering-and-aviation/ |title=Aerospace Engineering and Aviation Management undergraduate courses }}</ref>
* XW268 – [[City of Norwich Aviation Museum]], [[Norfolk]]<ref>{{Cite web |url=https://www.cnam.org.uk/|title= City of Norwich Aviation Museum |website=City of Norwich Aviation Museum}}</ref>
;AV-8A
* 159233 – [[Imperial War Museum North]]{{citation needed|date=October 2024}}

===United States===
;AV-8A
* 158695 – Air Park, [[Marine Corps Air Station Yuma|MCAS Yuma]], [[Yuma, Arizona]]{{citation needed|date=October 2024}}
* 159239 – [[San Diego Air and Space Museum]], [[San Diego, California]]{{citation needed|date=October 2024}}
* 158963 – [[Craven County Regional Airport]], [[Grantham, North Carolina]]{{cn|date=November 2025}}
* 158976 – City of Havelock, [[Havelock, North Carolina]]{{citation needed|date=October 2024}}
* Cockpit on display at Moffett Historical Museum, [[Moffett Federal Airfield|Moffett Federal Airfield, California]]<ref>{{Cite web |title=Exhibits |url=https://www.moffettfieldmuseum.org/exhibits.html |access-date=2025-03-09 |website=MOFFETT FIELD MUSEUM |language=en}}</ref>

;TAV-8A
* 159381 – [[Oakland Aviation Museum]], [[Oakland, California]]<ref>[http://oaklandaviationmuseum.org/aircraft_3.html "TAV-8A Harrier/159381."] {{Webarchive|url=https://web.archive.org/web/20130326183035/http://www.oaklandaviationmuseum.org/aircraft_3.html |date=26 March 2013 }} ''Oakland Aviation Museum''. Retrieved: 4 April 2013.</ref>
* 159382 – [[Pima Air & Space Museum]], [[Tucson, Arizona]]<ref>[http://www.pimaair.org/aircraft-by-name/item/harrier-2 "TAV-8A Harrier/159382."] {{Webarchive|url=https://web.archive.org/web/20151222113256/http://www.pimaair.org/aircraft-by-name/item/harrier-2 |date=22 December 2015 }} ''Pima Air & Space Museum''. Retrieved: 10 December 2015.</ref>
;AV-8C
* 158387 – [[Fort Worth Aviation Museum]], [[Fort Worth, Texas]]<ref>[https://flyingleathernecks.org/inside-loop/podcasts/av-8-harrier-and-an-update-on-the-museum/] {{Webarchive|url=https://web.archive.org/web/20211004171424/https://flyingleathernecks.org/inside-loop/podcasts/av-8-harrier-and-an-update-on-the-museum/|date=4 October 2021}} ''Flying Leatherneck Aviation Museum''. Retrieved: 4 October 2021.</ref>
* 158710 – [[Quonset Air Museum]], [[North Kingstown, Rhode Island]]{{citation needed|date=October 2024}}
* 158959 – [[Pacific Coast Air Museum]], [[Santa Rosa, California]]<ref>[http://www.pacificcoastairmuseum.org/aircraft/AV8CHarrier.asp "AV-8C Harrier/158959."] {{Webarchive|url=https://web.archive.org/web/20151218085639/http://www.pacificcoastairmuseum.org/aircraft/AV8CHarrier.asp |date=18 December 2015 }} ''Pacific Coast Air Museum''. Retrieved: 10 December 2015.</ref>
* 158975 – [[National Naval Aviation Museum]], [[NAS Pensacola]], [[Pensacola, Florida]]<ref>[http://www.navalaviationmuseum.org/attractions/aircraft-exhibits/item/?item=av-8_harrier "AV-8C Harrier/158975."] {{Webarchive|url=https://web.archive.org/web/20140716041604/http://www.navalaviationmuseum.org/attractions/aircraft-exhibits/item/?item=av-8_harrier |date=16 July 2014 }} ''National Naval Aviation Museum''. Retrieved: 10 December 2015.</ref>
* 158977 – [[Museum of Flight]], [[Seattle, Washington]]<ref>[http://www.museumofflight.org/aircraft/mcdonnell-douglas-av-8c-harrier "AV-8C Harrier/158977."] {{Webarchive|url=https://web.archive.org/web/20130109015555/http://www.museumofflight.org/aircraft/mcdonnell-douglas-av-8c-harrier |date=9 January 2013 }} ''Museum of Flight''. Retrieved: 4 April 2013.</ref>
* 159232 – [[Intrepid Sea, Air & Space Museum]], New York City, [[New York (state)|New York]]<ref>[http://www.intrepidmuseum.org/AircraftCollection.aspx "AV-8C Harrier/159232."] {{Webarchive|url=https://web.archive.org/web/20151219014823/http://www.intrepidmuseum.org/AircraftCollection.aspx |date=19 December 2015 }} ''Intrepid Sea, Air & Space Museum''. Retrieved: 10 December 2015.</ref>
* 159238 – Hangar 25 Museum, [[Webb AFB]] (formerly), [[Big Spring, Texas]]{{citation needed|date=October 2024}}
* 159241 – [[Pima Air & Space Museum]], [[Tucson, Arizona]]<ref>[http://www.pimaair.org/aircraft-by-name/item/british-aerospace-av-8c-harrier "AV-8C Harrier/159241."] {{Webarchive|url=https://web.archive.org/web/20151222125719/http://www.pimaair.org/aircraft-by-name/item/british-aerospace-av-8c-harrier |date=22 December 2015 }} ''Pima Air & Space Museum''. Retrieved: 10 December 2015.</ref>
* 159247 – Naval Inventory Control Point (NAVICP) Philadelphia, [[Philadelphia, Pennsylvania]]{{citation needed|date=October 2024}}
* 159249 – United States Naval Museum of Armament and Technology, NCC China Lake (North), [[Ridgecrest, California]]{{citation needed|date=October 2024}}

==Specifications (Harrier GR.3)==
{{Aircraft specs
|ref= Jane's All The World's Aircraft 1988–89<ref name="JAWA88 p290-1">Taylor 1988, pp. 290–291.</ref>
|prime units?=kts
<!--   General characteristics
-->
|crew=1
|length ft=46
|length in=10
|length note=
|span ft=25
|span in=5
|span note=<br />
::::{{cvt|29|ft|8|in|0}} with ferry tips fitted
|height ft=11
|height in=11
|height note=
|wing area sqft=201.1
|wing area note=<br />
::::{{cvt|216|sqft|0}} with ferry tips fitted
|aspect ratio=3.175
::::4.08 with ferry tips fitted
|airfoil='''root:''' Hawker 10%; '''tip:''' Hawker 3.3%<ref name="Selig">{{cite web |last1=Lednicer |first1=David |title=The Incomplete Guide to Airfoil Usage |url=https://m-selig.ae.illinois.edu/ads/aircraft.html |website=m-selig.ae.illinois.edu |access-date=16 April 2019}}</ref>
|empty weight lb=13535
|empty weight note=
|gross weight kg=
|gross weight lb=
|gross weight note=
|max takeoff weight kg=
|max takeoff weight lb=25200
|max takeoff weight note=
|fuel capacity={{cvt|5060|lb|0}} internal
::::2× {{cvt|100|impgal|USgal l}}, {{cvt|790|lb|0}} drop-tanks for combat
::::2× {{cvt|330|impgal|USgal l}}, {{cvt|2608|lb|0}} drop-tanks for ferry
<!--   Powerplant
-->
|eng1 number=1
|eng1 name=[[Rolls-Royce Pegasus 103]]
|eng1 type=vectored-thrust high-[[bypass ratio|bypass]] turbofan engine
|eng1 lbf=21500
|eng1 note=with water injection
<!--   Performance
-->
|max speed kts=635
|max speed note=at sea level
* '''Maximum diving speed''': Mach 1.3
|max speed mach=
|cruise speed kts=
|cruise speed note=
|stall speed kts=
|stall speed note=
|never exceed speed kts=
|never exceed speed note=
|range nmi=
|range note=
|combat range nmi=360
|combat range note=ho-lo-hi with {{cvt|4400|lb|0}} payload
::::{{cvt|200|nmi|mi km}} lo-lo with {{cvt|4400|lb|0}} payload
|ferry range nmi=1850
|ferry range note=with {{cvt|330|impgal|USgal l}} drop-tanks
::::{{cvt|3000|nmi|mi km}} with one AAR
|endurance=1 hour 30 minutes combat air patrol {{cvt|100|nmi|mi km}} from base.
::::7 hours plus with one AAR
|ceiling ft=51200
|ceiling note=
|g limits=+7.8 −4.2
|roll rate=<!-- aerobatic -->
|glide ratio=<!-- sailplanes -->
|climb rate ftmin=
|climb rate note=
|time to altitude={{cvt|40000|ft|0}} in 2 minutes 23 seconds from a vertical take-off
|wing loading lb/sqft=
|wing loading note=
|fuel consumption lb/mi=
|thrust/weight=

|more performance=
* '''Take-off run CTOL:''' {{cvt|1000|ft}} at max. TO weight
<!--   Armament
-->
|guns= 2× [[30 mm calibre|30 mm (1.18 in)]] [[ADEN cannon]] pods under the fuselage
|hardpoints= 4× under-wing & 1× under-fuselage pylon stations
|hardpoint capacity= 5,000 lb (2,268 kg)
|hardpoint rockets= 4× Matra rocket pods with 18× [[SNEB]] 68 mm rockets each
|hardpoint missiles= 2× [[AIM-9 Sidewinder]]s [[Air-to-air missile]]s
|hardpoint bombs= A variety of unguided [[Gravity bomb|iron bombs]], [[BL755]] [[cluster bomb]]s or [[laser-guided bomb]]s
** '''Others:'''
*** 1× [[Aerial reconnaissance#Reconnaissance pods|Reconnaissance pod]]
*** 2× [[drop tank]]s for extended range/loitering time

|avionics=* Ferranti LRMTS
* [[Marconi Avionics|Marconi]] ARI 18223 RWR
* [[Plessey]] U/VHF comms
* [[Ultra Electronics]] standby UHF
* [[GEC Avionics]] AD2770 TACAN
* [[Cossor]] IFF
* [[Ferranti]] FE541 INAS
* [[Sperry Corporation|Sperry]] C2G compass
* [[GE Aviation Systems|Smiths]] HUD
}}

==Popular culture==
{{Main|Aircraft in fiction#Hawker Siddeley Harrier|l1=Hawker Siddeley Harrier in fiction}}
<!-- ===============({{NoMoreCruft}})===============-->
<!-- Please READ [[Wikipedia:WikiProject Aircraft/page content#Popular culture]] and [[Wikipedia:WikiProject Military history/Style guide#Popular culture]] before adding any "Popular culture" items.

Please do not add the many minor appearances of the aircraft. This section is only for major cultural appearances where the aircraft plays a MAJOR part in the story line, or has an "especially notable" role in what is listed. A verifiable source proving the appearance's notability may be required. Random cruft, including ALL Ace Combat, Battlefield, and Metal Gear Solid appearances, and ALL anime/fiction lookalike speculation, WILL BE removed.

If your item has been removed, please discuss it on the talk page FIRST. A verifiable source proving the appearance's notability may be required. If a consensus is reached to include your item, a regular editor of this page will add it back. Thank you for your cooperation.-->

==See also==
{{Portal|United Kingdom|Aviation}}
{{aircontent
|see also=
* [[Aircraft in fiction#Harrier family|Aircraft in Fiction – the Harrier]]
|related=
* [[British Aerospace Harrier II]]
* [[British Aerospace Sea Harrier]]
* [[Hawker Siddeley P.1127]]/Kestrel
* [[McDonnell Douglas AV-8B Harrier II]]
|similar aircraft=
* [[Rockwell XFV-12]]
* [[Yakovlev Yak-38]]
}}

==References==

===Notes===
{{reflist|group=N}}

===Citations===
{{Reflist|25em|refs=
<ref name="XZ450">[https://www.naval-history.net/F63-Falklands-British_aircraft_lost.htm Naval-History.net: Sea Harrier XZ450 lost 4 May 1982]</ref>
<ref name="XZ452">[https://www.naval-history.net/F63-Falklands-British_aircraft_lost.htm Naval-History.net: Sea Harrier XZ452 lost 6 May 1982]</ref>
<ref name="XZ453">[https://www.naval-history.net/F63-Falklands-British_aircraft_lost.htm Naval-History.net: Sea Harrier XZ453 lost 6 May 1982]</ref>
<ref name="XZ972">[https://www.naval-history.net/F63-Falklands-British_aircraft_lost.htm Naval-History.net: Harrier GR.3 XZ972 shot down 21 May 1982]</ref>
<ref name="ZA192">[https://www.naval-history.net/F63-Falklands-British_aircraft_lost.htm Naval-History.net: Sea Harrier ZA192 crashed 23 May 1982]</ref>
<ref name="XZ988">[https://www.naval-history.net/F63-Falklands-British_aircraft_lost.htm Naval-History.net: Harrier GR.3 XZ988 shot down 27 May 1982]</ref>
<ref name="ZA174">[https://www.naval-history.net/F63-Falklands-British_aircraft_lost.htm Naval-History.net: Sea Harrier ZA174 accident 29 May 1982]</ref>
<ref name="XZ963">[https://www.naval-history.net/F63-Falklands-British_aircraft_lost.htm Naval-History.net: Harrier GR.3 XZ963 crash 30 May 1982]</ref>
<ref name="XZ456">[https://www.naval-history.net/F63-Falklands-British_aircraft_lost.htm Naval-History.net: Sea Harrier XZ456 shot down 1 June 1982]</ref>
<ref name="XZ989">[https://www.naval-history.net/F63-Falklands-British_aircraft_lost.htm Naval-History.net: Harrier GR.3 XZ989 damaged on landing 8 June 1982]</ref>
}}

===Bibliography===
* Bishop, Chris and Chris Chant. ''Aircraft Carriers''. Grand Rapids, Michigan, US: Zenith Imprint, 2004. {{ISBN|0-7603-2005-5}}.
* Braybrook, Roy. [https://books.google.com/books?id=ZUjMYkfr-pwC ''Battle for the Falklands: Air Forces''.]{{Dead link|date=July 2024 |bot=InternetArchiveBot |fix-attempted=yes }} Oxford, UK: Osprey Publishing, 1982. {{ISBN|0-85045-493-X}}.
* Brown, Kevin. [https://books.google.com/books?id=qNgDAAAAMBAJ&pg=PA80 "The Plane That Makes Airfields Obsolete."] ''Popular Mechanics'', 133(6), June 1970, pp.&nbsp;80–83.
* Bull, Stephen. ''Encyclopedia of Military Rechnology and Innovation''. Westport, Connecticut, US: Greenwood Publishing, 2004. {{ISBN|1-57356-557-1}}.
* Burke, David J. ''Harriers and Close Air Support''. [[Air Enthusiast]] 115, January–February 2005, p.&nbsp;75 {{ISSN|0143-5450}}
* Burr, Lawrence and Peter Bull. ''US Fast Battleships 1938–91: The Iowa Class''. New York, US: Osprey Publishing, 2010. {{ISBN|1-84603-511-2}}.
* Buttler, Tony. ''British Secret Projects: Jet Fighters Since 1950''. Hinckley, UK: Midland Publishing, 2000. {{ISBN|1-85780-095-8}}.
* {{cite book |last=Carpenter |first=William M. |author2=Wiencek, David G. |title=Asian Security Handbook 2000 |publisher=M. E. Sharpe |year=2000 |isbn=978-0-7656-0715-7 |url=https://books.google.com/books?id=_Dc665HSo_0C}}
* Chant, Chris. ''Air War in the Falklands 1982 (Osprey Combat Aircraft #28)''. Oxford, UK: Osprey Publishing, 2001. {{ISBN|978-1-84176-293-7}}.
* Congress Committee on Appropriations. "Department of Defense Appropriations for 1979: Part 5". Washington D.C., US: U.S. Government Printing Office, 1979.
* Davies, Peter and Anthony M. Thornborough. ''The Harrier Story''.  Annapolis, Maryland, US: Naval Institute Press, 1997. {{ISBN|978-1-55750-357-2}}.
* Ellis, Ken. ''Wrecks & Relics, 21st edition''. Manchester, UK: Crécy Publishing, 2008. {{ISBN|978-0-85979-134-2}}.
* Evans, Andy. ''BAe/McDonald Douglas Harrier''. Ramsbury, UK: The Crowood Press, 1998. {{ISBN|1-86126-105-5}}.
* Freedman, Lawrence. ''The Official History of the Falklands Campaign. Volume II: War and Diplomacy''. London, UK: Routledge, 2007. {{ISBN|978-0-415-41911-6}}.
* Friedman, Norman. ''U.S. Aircraft Carriers: an Illustrated Design History''. Annapolis, Maryland, US: Naval Institute Press, 1983. {{ISBN|0-87021-739-9}}.
* {{cite journal |last1=Goodrum|first1=Alastair|title=Down Range: Losses over the Wash in the 1960s and 1970s|journal=Air Enthusiast |date=January–February 2004 |issue=109 |pages=12–17 |issn=0143-5450}}
* Gunston, W.T. [http://www.flightglobal.com/pdfarchive/view/1977/1977%20-%200201.html "Pegasus updating prospects".] ''Flight International'', 22 January 1977, pp.&nbsp;189–191.
* Jackson, Paul. "British Aerospace/McDonnell Douglas Harrier". ''World Air Power Journal'', Volume 6, Summer 1991. pp.&nbsp;46–105.
* Jefford, C.G., ed. [https://web.archive.org/web/20110105084744/http://www.rafmuseum.org.uk/research/documents/Journal%2035A%20-%20Seminar%20-%20the%20RAF%20Harrier%20Story.pdf ''The RAF Harrier Story'']. London, UK: Royal Air Force Historical Society, 2006. {{ISBN|0-9530345-2-6}}.
* Jenkins, Dennis R. ''Boeing / BAe Harrier''. North Branch, Minnesota, US: Specialty Press, 1998. {{ISBN|1-58007-014-0}}.
* Layman, R D and Stephen McLaughlin. ''The Hybrid Warship''. London: Conway, 1991. {{ISBN|0-85177-555-1}}.
* Markman, Steve and Bill Holder. ''Straight Up: A History of Vertical Flight''. Atglen, PA: Schiffer Publishing, 2000. {{ISBN|0-7643-1204-9}}.
* Mason, Francis K. ''Harrier''. Wellingborough, UK: Patrick Stephens Limited, Third edition, 1986. {{ISBN|0-85059-801-X}}.
* Mason, Francis K. ''Hawker Aircraft since 1920''. London, UK: Putnam, 1991. {{ISBN|0-85177-839-9}}.
* Miller, David M.O. and Chris Miller. "Modern Naval Combat". Crescent Books, 1986. {{ISBN|0-517-61350-6}}.
* Moxton, Julian. [http://www.flightglobal.com/pdfarchive/view/1982/1982%20-%202681.html "Supersonic Harrier: One Step Closer".] ''Flight International'', 4 December 1982, pp.&nbsp;1633–1635.
* Nordeen, Lon O. ''Harrier II, Validating V/STOL''. Annapolis, Maryland, US: Naval Institute Press, 2006. {{ISBN|1-59114-536-8}}.
* Spick, Mike, ed. ''The Great Book of Modern Warplanes''. St. Paul, Minnesota, US: MBI Publishing, 2000. {{ISBN|0-7603-0893-4}}.
* Sturtivant, Ray. ''Fleet Air Arm Fixed-Wing Aircraft since 1946''. Tonbridge, Kent, UK: [[Air-Britain]] (Historians), 2004. {{ISBN|0-85130-283-1}}.
* Sturtivant, Ray. ''RAF Flying Training and Support Units since 1912''. Tonbridge, Kent, UK: [[Air-Britain]] (Historians), 2007. {{ISBN|0-85130-365-X}}.
* [[John W. R. Taylor|Taylor, John W.R.]] ''Jane's All The World's Aircraft 1988–89''. Coulsdon, UK: Jane's Defence Data, 1988. {{ISBN|0-7106-0867-5}}.
* Vann, Frank. ''Harrier jump jet''. New York, US: Bdd Promotional Book Co, 1990. {{ISBN|0-7924-5140-6}}.

==Further reading==
{{refbegin}}
* Farley, John OBE. ''A View From The Hover: My Life in Aviation''. Bath, UK: Seager Publishing/Flyer Books, 2010, first edition 2008. {{ISBN|978-0-9532752-0-5}}.
* [[Bill Gunston|Gunston, Bill]] and Mike Spick. ''Modern Air Combat: The Aircraft, Tactics and Weapons Employed in Aerial Warfare Today''. New York: Crescent Books, 1983. {{ISBN|0-517-41265-9}}.
* Mason, Francis. ''Hawker Aircraft since 1920''. London: Putnam Publishing, 1971. {{ISBN|0-370-00066-8}}.
* Polmar, Norman and Dana Bell. ''One Hundred Years of World Military Aircraft''. Annapolis, Maryland, US: Naval Institute Press, 2003. {{ISBN|1-59114-686-0}}.
{{refend}}

==External links==
{{Commons}}
* [http://www.harrier.org.uk Harrier history website] (see [https://web.archive.org/web/20090402071911/http://harrier.org.uk/welcome/index.htm archive])
* [http://www.naval-history.net/F63braircraftlost.htm Harriers lost in the Falklands]
* [http://www.afwing.com/gallery/beijing.htm Harrier GR.3 in Beijing Aviation Museum, China] {{Webarchive|url=https://web.archive.org/web/20190612025319/http://www.afwing.com/gallery/beijing.htm |date=12 June 2019 }}
* [http://www.flightglobal.com/pdfarchive/view/1967/1967%20-%202128.html "Harrier – World's First Fixed-wing V/STOL Weapons System"] a 1967 article in ''Flight''
* [http://www.flightglobal.com/pdfarchive/view/1969/1969%20-%203336.html "Harriers for the United States?"] 1969 ''Flight'' article on the USMC case for the Harrier
* [http://www.flightglobal.com/pdfarchive/view/1972/1972%20-%201202.html "Woodland Warfare"] a 1972 ''Flight'' article on Harrier dispersed operations
* [http://www.flightglobal.com/pdfarchive/view/1972/1972%20-%202593.html "V for Two"] a 1972 ''Flight'' article on the two-seat Harrier T.2
* [http://www.flightglobal.com/pdfarchive/view/1973/1973%20-%201501.html "In the Air – Harrier"] a 1973 ''Flight'' article on flying the Harrier
* [https://aircraftsale.co.uk/hawker-siddeley-harrier/ Hawker Siddeley Harrier] - Performance Specifications

{{Hawker Aircraft aircraft}}
{{BAE aircraft}}
{{McDonnell Douglas aircraft}}
{{Harrier variants}}
{{US attack aircraft}}
{{US STOL and VTOL aircraft}}
{{Spanish VTOL aircraft}}
{{Thai fighter designations}}
{{British military aircraft since World War II}}

{{good article}}
{{Authority control}}

[[Category:1960s British fighter aircraft]]
[[Category:Hawker Siddeley aircraft|Harrier]]
[[Category:V/STOL aircraft by thrust vectoring]]
[[Category:Single-engined jet aircraft]]
[[Category:High-wing aircraft]]
[[Category:Harrier Jump Jet]]
[[Category:Aircraft first flown in 1967]]
[[Category:Third-generation jet fighters]]
[[Category:Aircraft with retractable bicycle landing gear]]