Hawker Siddeley Harrier

Hawker Siddeley Harrier
Name	Hawker Siddeley Harrier
Type	VTOL ground-attack and fighter aircraft
Manufacturer	Hawker Siddeley Aviation
First flight	1967
Introduced	1969
Primary user	Royal Air Force
Produced	1967–1988
Number built	~824

Hawker Siddeley Harrier The Hawker Siddeley Harrier was a British-designed vertical/short takeoff and landing (V/STOL) jet developed in the 1960s and deployed by several armed forces. It combined vectored-thrust technology, jet engine innovation, and carrier-based adaptations to operate from unconventional sites associated with the Royal Navy, Royal Air Force, United States Marine Corps, Indian Navy, and export customers such as the Spanish Air Force. The Harrier influenced later aircraft programs and defense procurement debates in contexts including the Falklands War, Cold War, and NATO planning.

Development

Development traces to work at Bristol Aeroplane Company and research sponsored by the Ministry of Aviation that built on concepts from Rolls-Royce and national research centers. Early studies involved wind-tunnel tests at Royal Aircraft Establishment, collaboration with Harold B. Brown-type designers and engineers who had ties to English Electric and de Havilland. The jump jet concept matured into the P.1127 project under Stanley Hooker and others, leveraging the innovative Rolls-Royce Pegasus turbofan from Frank Whittle-era lineages. Political decisions by figures in the Heath Ministry and procurement reviews in the Whitehall complex shaped funding, while industrial consolidation led to production under Hawker Siddeley Aviation and later British Aerospace.

Flight-testing programs involved trials at RAF Boscombe Down, carrier assessments with HMS Ark Royal (1955), and operational evaluations influenced by doctrine from Royal Navy aviation planners and NATO staff at Supreme Headquarters Allied Powers Europe. Export negotiations engaged representatives from the United States Department of Defense, Indian Ministry of Defence, and specialists linked to the Spanish Ministry of Defense.

Design and Features

The platform centered on a single Rolls-Royce Pegasus vectored-thrust engine, derived from studies at Rolls-Royce plc facilities and incorporating issues addressed by engineers from Bristol Siddeley and Armstrong Siddeley. The airframe used aluminum alloys developed by Alcoa suppliers and manufacturing techniques influenced by Short Brothers and Vickers. Flight-control integration borrowed avionics concepts from systems used on English Electric Lightning and tactical navigation suites similar to those in McDonnell Douglas F-4 Phantom II exports. Weapons systems interfaced with stores management influenced by BAE Systems integration work and mounting options compatible with ordnance used by NATO partners including the United States Navy.

Key features included reaction control valves for hover stability, a swiveling nozzle assembly enabling transition between vertical lift and conventional flight, and a high-mounted wing to facilitate short-field operations analogous to concepts explored aboard aircraft carriers such as HMS Hermes (1953). Cooling and thermal management reflected lessons from Avro Vulcan operations, while maintainability drew on standards from RAF Maintenance Command.

Operational History

Operational deployment began with squadrons formed under Royal Air Force units and Royal Navy Fleet Air Arm commands, culminating in operational conversion units at RAF Wittering and HMS Siskin-type shore establishments. The Harrier saw notable combat in the Falklands War where elements from No. 1 Squadron RAF and No. 800 Naval Air Squadron conducted strike and reconnaissance missions from HMS Hermes (R12) and improvised forward operating bases, engaging targets associated with Argentine units such as those from Fuerza Aérea Argentina.

Later service included deployments to NATO exercises in West Germany, air policing tasks relating to tensions involving the Soviet Union, and expeditionary operations tied to coalitions that included the United States Marine Corps and forces under United Nations mandates. Lessons from combat experience influenced upgrades that paralleled developments in air-to-ground munitions used by contemporaries like General Dynamics F-16 Fighting Falcon operators and iterated compatibility with targeting pods similar to those applied to Northrop F-5 modernization efforts.

Variants

Production and prototype variants emerged through numbered increments including initial developmental P.1127 prototypes, evaluation Harrier GR.1 models fielded by RAF, sea-adapted Sea Harrier conversions influenced by Fleet Air Arm requirements, and subsequent GR.3 upgrades with enhanced engine control and avionics paralleling trends in 1970s tactical jet evolution. Further iterations incorporated lessons from international operators, culminating in two-seat trainers and specialized reconnaissance versions adopted by air arms like Indian Navy aviation and experimental platforms trialed at DSTL and related institutions. Internationally, modified examples were integrated with equipment interoperable with NATO allies such as those from Spain and trialed alongside USMC AV-8 variants that shared Pegasus lineage.

Operators and Service Use

Primary operators included the Royal Air Force, the Royal Navy, and the United States Marine Corps through purchases or license-built derivatives. Export customers and evaluated users included the Indian Navy, the Spanish Air Force, and training or evaluation units within agencies such as Royal Australian Air Force assessment teams. Units were stationed at bases such as RAF Wittering, RAF Cottesmore, HMS Ark Royal (R07)-related carrier deployments, and forward operating sites improvised during the Falklands War; integrated logistics and sustainment involved contractors with ties to Rolls-Royce and BAE Systems supply chains.

Survivors and Preservation

Numerous airframes are preserved in museums and collections, with examples displayed at institutions like the Imperial War Museum, the Fleet Air Arm Museum, and aerospace exhibits in venues associated with Royal Air Force Museum facilities. Restored machines appear at air shows linked to organizations such as the Aero Club community and in static collections maintained by trusts connected to former operators like No. 1 Squadron RAF and Fleet Air Arm Heritage Trust. Preservation activities often involve partnerships with heritage contractors that previously supported Hawker Siddeley and British Aerospace programs.

Category:British military aircraft