GR 9

GR 9
Name	GR 9
Type	Strike aircraft
National origin	United Kingdom
Manufacturer	British Aerospace
Introduction	2004
Status	In service
Primary user	Royal Air Force
Developed from	BAE Systems Harrier II

GR 9. The BAE Systems Harrier GR 9 was an upgraded variant of the Harrier jump jet family, serving as the primary strike aircraft for the Royal Air Force in the early 21st century. Developed from the Harrier GR7, it incorporated significant avionics and weapons system enhancements to extend the operational capability of the United Kingdom's V/STOL fleet. The GR 9 played a central role in operations over Afghanistan and was the final Harrier variant operated by the RAF before the type's retirement.

Overview

The GR 9 program was initiated to modernize the existing Harrier GR7 fleet, ensuring its relevance in contemporary combat environments characterized by network-centric warfare. Key improvements focused on integrating advanced precision-guided munitions and upgrading the aircraft's core avionics architecture. This upgrade was part of a broader collaboration between British Aerospace (later BAE Systems) and the United States-based Boeing, leveraging technology from the AV-8B Harrier II. The aircraft served prominently with units such as No. 1 Squadron RAF and No. IV Squadron RAF.

Design and development

The design and development of the GR 9 centered on the Joint Update and Maintenance Programme (JUMP), which was managed by BAE Systems at its facilities in Warton and Dunsfold. Primary modifications included the installation of a new open architecture mission computer, compatible with Link 16 datalinks, and enhanced cockpit displays similar to those in the Eurofighter Typhoon. Weapons integration was a major focus, with the aircraft certified to employ the AGM-65 Maverick missile and Paveway IV guided bomb. The upgrade also involved structural improvements to the airframe and the Rolls-Royce Pegasus engine to support increased payloads and sortie rates.

Operational history

The GR 9 entered operational service with the Royal Air Force in 2004, achieving initial operating capability with RAF Cottesmore. Its most significant combat deployment was in support of NATO-led operations in Afghanistan, where aircraft from RAF Kandahar conducted close air support and reconnaissance missions for International Security Assistance Force troops. The type also participated in major exercises like Exercise Red Flag at Nellis Air Force Base. The GR 9 fleet was hastily retired in 2010 following the Strategic Defence and Security Review 2010, with many airframes subsequently sold to the United States Navy for use as spares for the AV-8B fleet operated by the United States Marine Corps.

Variants

The primary variant was the GR 9A, which featured further avionics refinements and an upgraded Rolls-Royce Pegasus 107 engine. A dedicated two-seat trainer version, the T12, was also converted from earlier Harrier T10 models to retain pilot proficiency. Several airframes were designated as GR 9s with specific reconnaissance pods for surveillance tasks. Proposals for a more extensive GR 9B upgrade, potentially integrating AESA radar technology, were cancelled following the type's withdrawal from service.

Operators

The sole primary operator was the Royal Air Force. Key operational stations included RAF Cottesmore, RAF Wittering, and the forward operating base at RAF Kandahar. Following retirement, a number of airframes were transferred to the United States Navy at Naval Air Station Patuxent River for testing and cannibalization. No other national air forces operated the GR 9, though the upgrade program shared technology commonality with the Italian Air Force's AV-8B Harrier II fleet and the Spanish Navy's EAV-8B Matador.

Specifications (GR 9)

* **Crew:** 1 * **Length:** 14.12 m (46 ft 4 in) * **Wingspan:** 9.25 m (30 ft 4 in) * **Height:** 3.55 m (11 ft 8 in) * **Powerplant:** 1 × Rolls-Royce Pegasus 105 turbofan * **Maximum speed:** 1,065 km/h (662 mph) * **Range:** 1,200 km (750 mi) * **Service ceiling:** 15,000 m (49,000 ft) * **Armament:** 2 × 25 mm Aden cannon pods; up to 5,600 kg (12,300 lb) of ordnance on five hardpoints, including AIM-9 Sidewinder, AGM-65 Maverick, Paveway IV, and CRV7 rockets. * **Avionics:** GEC-Marconi avionics suite, BAE Systems mission computer, Thales Group head-up display, and Raytheon targeting pods.

Category:Military aircraft of the United Kingdom Category:Harrier jump jet Category:2000s British attack aircraft