Saab JAS 39 Gripen

JAS 39 Gripen
Swedish Air Force JAS 39 Gripen
Role	Fighter, attack and reconnaissance aircraft
Manufacturer	Saab Group
Design group	Industrigruppen JAS, FMV
First flight	9 December 1988
Introduction	1 November 1997
Status	In service
Primary users	Swedish Air Force South African Air Force Czech Air Force Hungarian Air Force
Produced	1987–present
Number built	Approx. 247

The Saab JAS 39 Gripen (griffin) is a lightweight single-engine multirole fighter aircraft manufactured by the Swedish aerospace company Saab. It was designed to replace the Saab 35 Draken and 37 Viggen in the Swedish Air Force (Flygvapnet). The Gripen has a delta wing and canard configuration with relaxed stability design and fly-by-wire flight controls. It is powered by the Volvo RM12, and has a top speed of Mach 2. Later aircraft are modified for NATO interoperability standards and to undertake in-flight refuelling.

In 1979, the Swedish government began development studies for an aircraft capable of fighter, attack and reconnaissance missions to replace the Saab 35 Draken and 37 Viggen. A new design from Saab was selected and developed as the JAS 39, first flying in 1988. Following two crashes during flight development and subsequent alterations to the aircraft's flight control software, the Gripen entered service with the Swedish Air Force in 1997. Upgraded variants, featuring more advanced avionics and adaptations for longer mission times, began entering service in 2003.

In order to market the aircraft to export customers, Saab has formed several partnerships and collaborative efforts with multiple overseas aerospace companies. One example of such efforts was Gripen International, a joint partnership between Saab and BAE Systems formed in 2001. Gripen International was responsible for marketing the aircraft, and was heavily involved in the successful export of the type to South Africa; the organization was later dissolved amidst allegations of bribery being employed to secure foreign interest and sales. On the export market, the Gripen has achieved moderate success in sales to nations in Central Europe, South Africa and Southeast Asia. As of 2013, more than 247 Gripens have been built.

A further version, designated Gripen JAS 39 E/F, is under development as of 2014; it has been referred to as Gripen NG or Super-JAS. The changes include the adoption of a new powerplant, the General Electric F414G, an active electronically scanned array radar, and significantly increased internal fuel capacity. Saab has proposed other derivatives, including a navalised Sea Gripen for carrier operations and an optionally-manned aircraft for unmanned operations. Sweden has ordered the Gripen NG and Brazil and Switzerland selected it for procurement.

Development

Origins

By the late 1970s, Sweden needed a replacement for its ageing Saab 35 Draken and Saab 37 Viggen. The Swedish Air Force required an affordable Mach 2 aircraft with good short-field performance for a defensive dispersed basing plan in the event of invasion; the plan included 800  m long by 9  m wide rudimentary runways as stated in the Base 90 directives. One goal was for the aircraft to be smaller than the Viggen while equalling or improving on its payload-range characteristics. Early proposals included the Saab 38, also called B3LA, intended as an attack aircraft and trainer, and the A 20, a development of the Viggen that would have capabilities as a fighter, attack and sea reconnaissance aircraft. Several foreign designs were also studied, including the General Dynamics F-16 Fighting Falcon, the McDonnell Douglas F/A-18 Hornet, the Northrop F-20 Tigershark and the Dassault Mirage 2000. Ultimately, the Swedish government opted for a new fighter to be developed by Saab (Svenska Aeroplan Aktiebolag).

In 1979, the government started a study calling for a versatile platform capable of "JAS", standing for Jakt (air-to-air), Attack (air-to-surface), and Spaning (reconnaissance), indicating a multirole, or swingrole, fighter aircraft that can fulfill multiple roles during the same mission. A number of Saab designs were accordingly reviewed, with the most promising being "Project 2105" (redesignated "Project 2108" and, later, "Project 2110"), recommended to the government by the Defence Materiel Administration (Försvarets Materielverk, or FMV). In 1980, Industrigruppen JAS (IG JAS, "JAS Industry Group") was established as a joint venture by Saab-Scania, LM Ericsson, Svenska Radioaktiebolaget, Volvo Flygmotor and Försvarets Fabriksverk, the industrial wing of the Swedish armed forces.

The preferred aircraft was a single-engine, lightweight single-seater, embracing fly-by-wire technology, canards, and an aerodynamically unstable design. The powerplant selected was the Volvo-Flygmotor RM12, a license-built derivative of the General Electric F404-400; engine development priorities were weight reduction and lowering component count. On 30 June 1982, with approval from the Riksdag, the FMV issued contracts to prime contractor Saab covering five prototypes and an initial batch of 30 production aircraft. To test avionics intended for the JAS 39, such as the fly-by-wire controls, a Viggen was converted to operate as a test aircraft, flying by January 1983. Through a public competition, the JAS 39 received the name Gripen (griffin), which is the heraldry on Saab's logo.

Testing, production and improvements

External videos
Ground footage of the 1989 Gripen crash

In 1982, Sweden placed the fixed-price order, worth SEK25.7 billion, for five prototypes and 30 JAS 39A single-seaters. The first Gripen was rolled out on 26 April 1987, marking Saab's 50th anniversary. Originally planned to fly in 1987, the first flight was delayed by 18 months due to issues with the flight control system. On 9 December 1988, the first prototype (serial number 39-1) took its 51-minute maiden flight with pilot Stig Holmström at the controls. During the test programme, concern surfaced about the aircraft's avionics, specifically the fly-by-wire flight control system (FCS), and the relaxed stability design configuration. On 2 February 1989, this issue was dramatically highlighted with the crash of the prototype during an attempted landing at Linköping, after which test pilot Lars Rådeström walked away with only a broken elbow. The cause of the crash was identified as pilot-induced oscillation, caused by problems to the FCS's pitch-control routine.

To rectify the problem, Saab and US firm Calspan introduced major software improvements to the aircraft. A modified Lockheed NT-33A was used to test these improvements, which allowed flight testing to resume within 15 months following the accident. The programme was again hindered when, on 8 August 1993, production aircraft 39102 was destroyed in an accident during an aerial display in Stockholm. Test pilot Rådeström lost control of the aircraft during a roll at low altitude, and the aircraft rapidly stalled, forcing him to eject. Saab later found the problem to be high amplification of the pilot's quick and significant stick command inputs. The ensuing investigations and flaw rectification delayed test flying by several months, resuming in December 1993.

The first order also included an option for another 110, which became a firm order in June 1992. Batch II consisted of 96 one-seat JAS 39As and 14 two-seat JAS 39Bs. The JAS 39B variant is 66 cm (26 in) longer than the JAS 39A to accommodate a second seat, which also necessitated the deletion of the cannon and a reduced internal fuel capacity. By April 1994, five prototype Gripens and two series-production aircraft had been completed; the only major decision remaining was to select a beyond-visual-range missile (BVR).

A third batch of Gripens was ordered in June 1997, composed of 50 upgraded single-seat JAS 39Cs and 14 JAS 39D two-seaters, developed as the ‘Turbo Gripen’ for exports, with NATO compatibility. Batch III aircraft, delivered between 2002 and 2008, possess more powerful and updated avionics, in-flight refuelling capability via retractable probes on the aircraft's starboard side, and an on-board oxygen-generating system for longer missions. To test the viability of in-flight refuelling, Flight Refuelling outfitted a prototype (39‐4), successfully tested with a Royal Air Force VC10 in 1998.

Teaming agreements

Czech Gripen deploying defensive flares, 2011

During the 1995 Paris Air Show, Saab Military Aircraft and British Aerospace (BAe, now BAE Systems) announced the formation the joint-venture company Saab-BAe Gripen AB with the goal of adapting, manufacturing, marketing and supporting Gripen worldwide. The deal involved the conversion of the A and B series aircraft to the "export" C and D series, which developed the Gripen for compatibility with NATO standards. This cooperation was extended in 2001 with the formation of Gripen International to promote export sales. In December 2004, Saab and BAE Systems announced that BAE was to sell a large portion of its stake in Saab, and that Saab would take full responsibility for marketing and export orders of the Gripen. In June 2011, Saab announced that an internal investigation revealed evidence former partner BAE Systems had performed acts of corruption, including money laundering, in South Africa, a customer of the Gripen.

On 26 April 2007, Norway signed a NOK150 million joint-development agreement with Saab to cooperate in the development programme of the Gripen, including the integration of Norwegian industries in the development of future versions of the aircraft. In June of the same year, Saab also entered an agreement with Thales Norway A/S concerning the development of communications systems for the Gripen fighter; this order was the first to be awarded under the provisions of the Letter of Agreement signed by the Norwegian Ministry of Defence and Gripen International in April 2007. As a result of the United States diplomatic cables leak in 2010, it was revealed that US diplomats had become concerned with cooperation between Norway and Sweden on the topic of the Gripen, and had sought to exert pressure against a Norwegian purchase of the aircraft.

In December 2007, as part of Gripen International's marketing efforts in Denmark, a deal was signed with Danish technology supplier Terma A/S which allows them to participate in an industrial cooperation programme over the next 10–15 years. The total value of the programme is estimated at over DKK10 billion, and is partly dependent on a procurement of the Gripen by Denmark.

Controversies, scandals, and costs

Developing an advanced multi-role fighter was a major undertaking for Sweden. The predecessor Viggen, despite being less advanced and less expensive, had been criticized for occupying too much of Sweden's military budget and was branded "a cuckoo in the military nest" by critics as early as 1971. At the 1972 party congress of the Social Democrats, the dominant party in Swedish politics since the 1950s, a motion was passed to stop any future projects to develop advanced military aircraft. In 1982, the project passed in the Riksdag by a narrow of margin of 176 for and 167 against, with the entire Social Democratic voting against the proposal due to demands for more studies. A new bill was introduced in 1983 and a final approval was given in April 1983 with the condition that the project was to have a predetermined fixed-price contract, a decision that would later be criticized as unrealistic due to later cost overruns.

According to Annika Brändström, in the aftermath of the crashes in 1989 and 1993 during the aircraft's development, the Gripen project risked loss of credibility and the weakening of its public image. There was public speculation that failures to address the technical problems exposed in the first crash had directly contributed to the second crash and thus would have been avoidable. Brändström observed that elements of the national media had called for greater public accountability and explanation of the project; ill-informed media analysis had also proved to distort public knowledge of the Gripen. The sitting Conservative government was quick to initiate efforts to maintain political support for the Gripen and endorse the aircraft – Minister of Defense Anders Björck issued a public reassurance that the project was very positive for Sweden.

In relation to the marketing efforts of the Gripen to multiple countries, including South Africa, Austria, the Czech Republic and Hungary, there were media reports of widespread bribery and corruption by BAE Systems and Saab. In 2007, Swedish journalists reported that BAE had paid bribes equivalent to millions of dollars, and was followed by investigative reporting on BAE Systems in the UK and South Africa. Following criminal investigations in eight countries, only one individual in Austria, Alfons Mensdorf-Pouilly, was prosecuted for bribery. The scandal tarnished the international reputation of the Gripen, BAE Systems, Saab, and Sweden.

The Gripen's cost has been subject to frequent attention and speculation. In 2008, Saab announced reduced earnings for that year, partly attributing this to increased marketing costs for the aircraft. In 2008, Saab disputed Norway's cost calculations for the Gripen NG as overestimated and in excess of real world performance with existing operators. A 2007 report by the European Union Institute for Security Studies stated the total research and development costs of Gripen to be €1.84 billion. According to a white paper produced by Jane's Information Group in 2012, the Gripen's operational cost was the lowest among a flightline of modern fighters, estimated to cost $4,700 per flight hour. According to the Swedish Ministry of Defense, the cost estimation of the full system, comprising 60 Gripen E/F, amounts to SEK 90 billion distributed over the period 2013–42. The Swedish Armed Forces estimates that the option of maintaining 100 aircraft of the C/D-model until 2042 would cost SEK 60 billion, while the option of buying aircraft from a foreign supplier would cost SEK 110 billion.

Further developments

Saab Gripen NG demonstrator at RIAT 2010

A two-seat aircraft, designated "Gripen Demo", was ordered in 2007 as a testbed for various upgrades. It was powered by the General Electric F414G, a development of the Boeing F/A-18E/F Super Hornet's engine. The Gripen NG's maximum take off weight was increased from 14,000 to 16,000 kg (30,900–35,300 lb), internal fuel capacity was increased by 40 per cent by relocating the undercarriage, which also allowed for two hardpoints to be added on the fuselage underside. Its combat radius was 1,300 kilometres (810 mi) when carrying six AAMs and drop tanks. The PS-05/A radar is replaced by the new Raven ES-05 active electronically scanned array (AESA) radar, which is based on Selex ES's Vixen AESA radar family. The Gripen Demo's maiden flight was conducted on 27 May 2008. On 21 January 2009, the Gripen Demo flew at Mach 1.2 without reheat to test its supercruise capability. The Gripen Demo served as a basis for the Gripen E/F, also referred to as the Gripen NG (Next Generation) and MS 21.

Saab performed study work on an variant of the Gripen capable of operating from aircraft carriers in the 1990s. In 2009, Saab launched the Sea Gripen project in response to India's request for information on a carrier-borne aircraft. Brazil may also potentially require new carrier aircraft. Following a meeting with Ministry of Defence (MoD) officials in May 2011, Saab agreed to establish a development center in the UK to expand on the Sea Gripen concept. In 2013, Saab's Lennart Sindahl stated that development of an optionally-manned version of the Gripen E capable of flying unmanned operations was being explored by the firm; further development of the optionally-manned and carrier versions would require the commitment of a customer.

Sweden awarded Saab a four-year contract in 2010 to improve the Gripen's radar and other equipment, integrate new weapons, and lower its operating costs. In June 2010, Saab stated that Sweden planned to order the Gripen NG, designated as JAS 39E/F, and was to enter service in 2017 or earlier dependent on export orders. On 25 August 2012, following Switzerland's decision to buy 22 of the E/F variants, Sweden announced it planned to buy 40–60 Gripen E/Fs. The Swedish government approved the decision to purchase 60 Gripen Es on 17 January 2013, with the first deliveries pushed back to 2018. In July 2013, construction begun on pre-production aircraft.

Design

Overview

Underside of a Gripen in flight, 2012

The Gripen is a multirole fighter aircraft, designed to be a lightweight and agile aerial platform while incorporating advanced and highly-adaptable avionics systems. In order to deliver a high level of manoeuvrability in conjunction with good short takeoff and landing performance, Saab chose to develop an aerodynamic delta wing-canard design with low drag. The design also employs digital fly-by-wire flight controls allowing for a relaxed stability design for considerable agility. The Gripen has good short takeoff performance, capable of maintaining a high sink rate and is strengthened to withstand the stresses of conducting short landings; the canards also decrease landing distance when angled downwards to act as air brakes.

In order to enable the Gripen to have a long service life, projected to be roughly 50 years, the aircraft was designed to have low maintenance requirements; major systems such as the RM12 engine and PS-05/A radar are of a modular construction, this approach was to reduce operating cost and increase reliability. The Gripen was designed to be flexible as it had been anticipated that newly developed sensors, computers, and armaments would need to be integrated as technology advances. The aircraft was estimated to be roughly 67% sourced from Swedish or European suppliers and 33% from the United States.

One key aspect of the Gripen program that Saab have been keen to emphasize has been technology-transfer agreements and industrial partnerships with export customers. The Gripen is typically customized to customer requirements, enabling the routine inclusion of local suppliers in the manufacturing and support processes. A number of South African firms provide components and systems – including the communications suite and electronic warfare systems – for the Gripens operated by South African Air Force. Operators also have access to the Gripen's source code and technical documentation, allowing for upgrades and new equipment to be independently integrated. Some export customers intend to domestically assemble the Gripen; it has been proposed that Brazilian aerospace manufacturer Embraer may produce Gripens for other export customers as well.

Aerodynamics

Main article: relaxed stability

The Gripen was designed for intentional instability in order to improve manœuvrability. Thus its prominent canard wing.

A canard wing gives a positive lift force contribution at all speeds, compared with a tail positioned stabilizer which, at high speeds, results in a negative lift that must be compensated with increased lift on the main wing, leading to increased induced drag. A common drawback of delta and canard wings is the severe restrictions on the centre of gravity of the aircraft, to keep it stable. For example, in the Saab 37 Viggen the engine's placement in the fuselage had to be far enough forward that the centre of gravity is in front of aircraft’s aerodynamic center, which gave it its characteristic appearance. Airframe abrupt termination shortly after the trailing edge adversely affects the transonic air resistance because of an uneven area distribution and necessitates a more powerful engine. By allowing the Gripen to be aerodynamically unstable, it was freed from many of the flight mechanics restrictions, including placing the engine further back in the body, resulting in a favourable area distribution and reducing drag. The computerized fly-by-wire control system makes the pilot perceive the plane as stable. In an emergency, one lets the canard free to move with the wind: its lift contribution disappears, the aerodynamic centre moves backwards and the plane becomes stable.

Avionics and sensors

All of the Gripen's avionics are fully integrated using total of five MIL-STD 1553B digital data buses, described as 'sensor fusion'. The total integration of the avionics makes the Gripen a "programmable" aircraft, allowing software updates to be introduced over time to increase performance and additional operational roles and equipment. The ADA programming language was adopted for the Gripen, and is used for the primary flight controls on the final prototypes from 1996 onwards and all subsequent production aircraft. The Gripen's software is continuously being improved to add new capabilities, as compared to the preceding Viggen which was updated only in an 18-month schedule.

Much of the data generated from the onboard sensors and by cockpit activity is digitally recorded throughout the length of an entire mission. This information can be replayed in the cockpit or easily extracted for detailed post-mission analysis using a this data transfer unit that can also be used to insert mission data to the aircraft. The Gripen, like the Viggen, was designed to operate as one component of a networked national defence system, which allows for automatic exchange of information in real-time between Gripen aircraft and ground facilities. According to Saab, the Gripen features "the world's most highly developed data link". The Gripen's Ternav tactical navigation system combines information from multiple onboard systems such as the air data computer, radar altimeter, and GPS to continuously calculate the Gripen's location.

The Gripen entered service using the PS-05/A pulse-doppler X-band multi-mode radar, developed by Ericsson and GEC-Marconi, which is based on the latter's advanced Blue Vixen radar for the Sea Harrier that also served as the basis for the Eurofighter's CAPTOR radar. The all-weather radar is capable of locating and identifying targets 120 km (74 mi) away, and automatically tracking multiple targets in the upper and lower spheres, on the ground and sea or in the air. It can guide several beyond visual range air-to-air missiles to multiple targets simultaneously. Saab stated the PS-05/A is able to handle all types of air defense, air-to-surface, and reconnaissance missions.

The future Gripen E/F shall make use of a new active electronically scanned array (AESA) radar, Raven ES-05, based on Selex ES's Vixen AESA radar family. Amongst other improvements, the new radar is to be capable of scanning over a greatly increased field of view and improved range. In addition, the new Gripen integrates the Skyward-G infrared search and track (IRST) sensor, which is capable of passively detecting thermal emissions from air and ground targets in the aircraft's vicinity.

Cockpit

A pilot seated in the open cockpit of a Gripen, 2006

The primary flight controls are compatible with the HOTAS control principle – the centrally mounted stick, in addition to flying the aircraft, also controls the cockpit displays and weapon systems. A triplex, digital fly-by-wire system is employed on the Gripen's flight controls, with a mechanical backup for the throttle. Additional functions, such as communications, navigational and decision support data, can be accessed via the up front control panel, directly above the central cockpit display.

The Gripen includes the EP-17 cockpit display system, developed by Saab to provide pilots with a high level of situational awareness and reduces pilot workload through intelligent information management. The Gripen features a sensor fusion capability, information from onboard sensors and databases is combined, automatically analysed, and useful data is presented to the pilot via a wide field-of-view head-up display, three large multi-function colour displays, and optionally a helmet mounted display system (HMDS).

Of the three multi-function displays (MFD), the central display is for navigational and mission data, the display to the left of the center shows aircraft status and electronic warfare information, and the display to the right of the center has sensory and fire control information. In two-seat variants, the rear seat's displays can be operated independently of the pilot's own display arrangement in the forward seat, Saab has promoted this capability as being useful during electronic warfare and reconnaissance missions, and while carrying out command and control activities. In May 2010, Sweden began equipping their Gripens with additional onboard computer systems and new displays. The MFDs are interchangeable and designed for redundancy in the event of failure, flight information can be presented on any of the displays.

Saab and BAE developed the Cobra HMDS for use in the Gripen, based on the Striker HMDS used on the Eurofighter. By 2008, the Cobra HMDS was fully integrated on operational aircraft, and is available as an option for export customers; it has been retrofitted into older Swedish and South African Gripens. The HMDS provides control and information on target cueing, sensor data, and flight parameters, and is optionally equipped for night time operations and with chemical/biological filtration. All connections between the HMDS and the cockpit were designed for rapid detachment, for safe use of the ejection system.

Engine

A technician visually inspecting a Gripen's RM-12 engine in-situ

Further information: Volvo RM12

All in-service Gripens as of January 2014 are powered by the Volvo RM12 turbofan engine, a license-manufactured derivative of General Electric F404 ; changes include increased performance and improved reliability to meet single engine use safety criteria, as well as a greater resistance to bird strike incidents. Several subsystems and components were also redesigned to reduce maintenance demands. By November 2010, the Gripen had accumulated over 143,000 flight hours without a single engine-related failure or incident; Rune Hyrefeldt, head of Military Program management at Volvo Aero, stated "I think this must be a hard record to beat for a single-engine application".

The JAS 39E and F variants currently under development are to adopt the F414G powerplant, a variant of the General Electric F414. The F414G can produce 20% greater thrust than the current RM12 engine, enabling the Gripen to supercruise (maintain speed beyond the sound barrier without the use of afterburners) at a speed of Mach 1.1 while carrying an air-to-air combat payload. In 2010, Volvo Aero stated it was capable of further developing its RM12 engine to better match the performance of the F414G, and claimed that developing the RM12 would be a less expensive option. Prior to Saab's selection of the F141G, the Eurojet EJ200 had also been under consideration for the Gripen; proposed implementations included the use of thrust vectoring.

Equipment and armaments

The Gripen is compatible with a number of different armaments, beyond the aircraft's single 27 mm Mauser BK-27 cannon (deleted on two-seat variants), including air-to-air missiles such as the AIM-9 Sidewinder, air-to-ground missiles such as the AGM-65 Maverick, and anti-ship missiles such as the RBS-15. In 2010, the Swedish Air Force's Gripen fleet completed the MS19 upgrade process, enabling compatibility with a range of weapons, including the long-range MBDA Meteor missile, the short-range IRIS-T missile and the GBU-49 laser-guided bomb. Speaking on the Gripen's selection of armaments, Saab's campaign director for India Edvard de la Motte stated that: "If you buy Gripen, select where you want your weapons from. Israel, Sweden, Europe, US… South America. It’s up to the customer".

In flight, the Gripen is typically capable of carrying up to 14,330 lb (6.50 t) of assorted armaments and equipment. Equipment includes external sensor pods for reconnaissance and target designation, such as Rafale's LITENING targeting pod, Saab's Modular Reconnaissance Pod System, or Thales' Digital Joint Reconnaissance Pod. The Gripen has an advanced and integrated electronic warfare suite, capable of operating in an undetectable passive mode or to actively jam hostile radar; a missile approach warning system passively detects and tracks incoming missiles. Equipment for performing long range missions, such as an aerial refueling probe and onboard oxygen generation system (OBOGS), was integrated upon the Gripen C/D.

Saab describes the Gripen as a "swing-role aircraft", stating that it is capable of "instantly switching between roles at the push of a button". The human/machine interface changes when switching between roles, being optimized by the computer in response to new situations and threats. The Gripen is also equipped to use a number of different communications standards and systems, including SATURN secure radio, Link-16, ROVER, and satellite uplinks.

Usability and maintenance

Gripen during takeoff in snowy conditions, 2012

During the Cold War, the Swedish Armed Forces were to be ready to defend against a possible invasion from the Soviet Union. This scenario required combat aircraft to be dispersed in order to maintain an air defence capacity. Thus, a key design goal during the Gripen's development was the ability to take off from snow-covered landing strips of only 800 metres (2,600 ft); furthermore, a short-turnaround time of just ten minutes, during which a team composed of a technician and five conscripts would be able to re-arm, refuel, and perform basic inspections and servicing inside that time window before returning to flight.

During the design process, great priority was placed on facilitating and minimising the maintenance the aircraft; in addition to a maintenance-friendly layout, many subsystems and components require little or no maintenance at all. Each aircraft is fitted with a Health and Usage Monitoring Systems (HUMS) that monitors and records the performance of various systems, and provides information to technicians to assist in servicing it. Additionally, the manufacturer operates a continuous improvement programme for the Gripen; towards this end, information from the HUMS and other Gripen systems can be submitted for analysis. According to Saab, the Gripen provides "50% lower operating costs than its best competitor".

A 2012 Jane's Aerospace and Defense Consulting study compared the operational costs of a number of modern combat aircraft aircraft, concluding that Gripen had the lowest cost per flight hour (CPFH) when fuel used, pre-flight preparation and repair, and scheduled airfield-level maintenance together with associated personnel costs were combined. Then next cheapest, the Block 40/50 F-16, had a 49% higher CPFH at an estimated $7,000 per hour, with the twin-engine aircraft costing at least double that.

Operational history

Sweden

The Swedish Air Force placed a total order for 204 Gripens in three batches. The first delivery occurred on 8 June 1993, when 39102 was handed over to the Flygvapnet during a ceremony at Linköping; the last was handed over on 13 December 1996. The air force received its first Batch II example on 19 December 1996. Instead of the fixed-price agreement of Batch I, Batch II aircraft were paid as a "target price" concept: any cost under/overruns would be split between FMV and Saab.

Gripen taking off, 2004

The JAS 39 entered service with the F 7 Wing (F 7 Skaraborgs Flygflottilj) on 1 November 1997. The final Batch three aircraft was delivered to FMV on 26 November 2008. This was accomplished at 10% less than the agreed-upon price for the batch, putting the JAS 39C flyaway cost at under US$30 million. This batch of Gripens was equipped for in-flight refuelling by specially equipped TP84s (known internationally as the C-130 Hercules) already in service. In 2007, a programme was started to upgrade 31 of the air force's JAS 39A/B fighters to JAS 39C/Ds. The SAF has a combined 134 JAS 39s in service in January 2013.

On 29 March 2011, the Swedish parliament approved the Swedish Air Force for a 3-month deployment to support the UN-mandated no-fly zone over Libya. Deployment of eight Gripens, ten pilots, and other personnel began on 2 April. Sweden's role to the no-fly zone involved conducting only aerial reconnaissance. On 8 June 2011, the Swedish government announced an agreement to extend the deployment for five of the Gripens. By October 2011, Gripens have flown more than 650 combat missions, almost 2,000 flight hours, and delivered approximately 2,000 reconnaissance reports to NATO. Journalist Tim Hepher suggested that operations over Libya may stimulate sales of several modern aircraft, such as the Gripen.

In November 2012, Lieutenant Colonel Lars Helmrich of the Swedish Air Force testified to the Riksdag regarding the Gripen E. He stated that the current version of the Gripen would be outdated in air to air combat by 2020. With 60 Gripens having been judged to be the minimum required to defend Swedish Airspace, the Swedish Air Force wants to have 60–80 Gripens upgraded to the E/F standard by 2020.

On 25 August 2012, the Swedish government announced that a procurement of 40–60 JAS 39E/F Gripens was expected, and planned to be in service by 2023. On 11 December 2012, the Riksdag approved the purchase of 40 to 60 JAS 39E/Fs, but with an option to cancel if at least 20 aircraft are not ordered by other customers. The government approved the deal for 60 Gripen Es on 17 January 2013, with deliveries scheduled from 2018 to 2027.

Czech Republic

A pair of Czech Air Force Gripens in flight, 2010

When the Czech Republic became a NATO member in 1999, the need to replace their existing Soviet-built MiG-21 fleet with aircraft compatible with NATO interoperability standards became apparent. In 2000, the Czech Republic began evaluating a number of aircraft, including the F-16, F/A-18, Mirage 2000, Eurofighter Typhoon and the Gripen. One major procurement condition was the industrial offset agreement, set at 150% of the expected purchase value. In December 2001, having reportedly been swayed by Gripen International's generous financing and offset programme, the Czech Government announced that the Gripen had been selected. In 2002, the deal was delayed until after parliamentary elections had taken place; alternative means of air defense were also studied, including leasing the aircraft.

On 14 June 2004, it was announced that the Czech Republic was to lease 14 Gripen aircraft, modified to comply with NATO standards. The agreement also included the training of Czech pilots and technicians in Sweden. The first six were delivered on 18 April 2005. The lease was for an agreed period of 10 years at a cost of €780 million; the 14 ex-Swedish Air Force aircraft included 12 single-seaters and two JAS 39D two-seat trainers. In September 2013, the Defence and Security Export Agency announced that a follow-up agreement with the Czech Republic had been completed to extend the lease by 14 years, until 2029; the leased aircraft shall also undergo an extensive modernisation process, including the adoption of new datalinks. The lease also has an option of eventually acquiring the fighters outright.

Hungary

Following Hungary's membership of NATO in 1999, there were several proposals to achieve a NATO-compatible fighter force. Considerable attention went into studying second-hand aircraft options as well as modifying the nation's existing MiG-29 fleet. In 2001, Hungary received several offers of new and used aircraft from various nations, including Sweden, Belgium, Israel, Turkey, and the United States. Although the Hungarian government initially intended to procure the F-16, in November 2001 it was in the process of negotiating a 10-year lease contract for 12 Gripen aircraft, with an option to purchase the aircraft at the end of the lease period.

Hungarian Air Force Gripen during inverted flight, 2007

As part of the procurement arrangements, Saab had offered an offset deal valued at 110 per cent of the cost of the 14 fighters. Initially, Hungary had planned to lease several Batch II aircraft; however, the inability to conduct aerial refuelling and weapons compatibility limitations had generated Hungarian misgivings. The contract was renegotiated and was signed on 2 February 2003 for a total of 14 Gripens, which had originally been A/B standard and had undergone an extensive upgrade process to the NATO-compatible C/D 'Export Gripen' standard. The last aircraft deliveries took place in December 2007.

While the Hungarian Air Force operates a total of 14 Gripen aircraft under lease, in 2011, the country reportedly intended to purchase these aircraft outright. However, the Hungarian Nepszabadsag newspaper announced in January 2012 that the Hungarian and Swedish governments agreed to extend the lease period for a further ten years; according to Hungarian Defence Minister Csaba Hende, the agreement represented considerable cost savings.

South Africa

A South African Air Force JAS 39C Gripen in flight

In 1999, South Africa signed a contract with BAE/Saab for the procurement of 26 Gripens (C/D standard) with minor modifications to meet their requirements. Deliveries to the South African Air Force commenced in April 2008. By April 2011, 18 aircraft (nine two-seater aircraft and nine single-seaters) had been delivered. While the establishment of a Gripen Fighter Weapon School at Overberg Air Force Base in South Africa had been under consideration, in July 2013 Saab ruled out the option due to a lack of local support for the initiative; Thailand is an alternative location being considered.

Between April 2013 and December 2013, South African contractors held prime responsibility for maintenance work on the Gripen fleet as support contracts with Saab had expired; this arrangement led to fears that extended operations may not be possible due to a lack of proper maintenance. In December 2013, Armscor awarded Saab a long-term support contract for the company to perform engineering, maintenance, and support services on all 26 Gripens through 2016. On 13 March 2013, South African Defense Minister Nosiviwe Mapisa-Nqakula stated that "almost half of the SAAF Gripens" have been stored because of insufficient budget to keep them flying. In September 2013, the SAAF decided not to place a number of its Gripens in long-term storage; instead all 26 aircraft would be rotated between flying cycles and short-term storage. Speaking in September 2013, Brigadier-General John Bayne testified that the Gripen met the SAAF's minimum requirements, as the country faced no military threats.

Thailand

Saab JAS 39 Gripen of the Royal Thai Air Force

In 2007, Thailand's Parliament authorized the Royal Thai Air Force to spend up to 34 billion baht (US$1.1 billion) as part of an effort to replace Thailand's existing Northrop F-5 fleet. In February 2008, the Thai Air Force ordered six Gripens (two single-seat C-models and four two-seat D-models) from Saab; deliveries began in 2011. Thailand ordered six more Gripen Cs in November 2010; deliveries began in 2013. Thailand may eventually order as many as 40 Gripens. In 2010, Thailand selected the Surat Thani Airbase as the main operating base for its Gripens. The first of the six aircraft were delivered on 22 February 2011.

Saab delivered three Gripens in April 2013, and three more in September 2013. In September 2013, Air Force Marshal Prajin Jantong stated that Thailand is interested in purchasing six aircraft more in the near future, pending government approval. Thai Supreme Commander General Thanasak Patimapragorn has stated that the air force intends for the Gripen's information systems to be integrated with Army and Navy systems; the armed forces will officially inaugurate the Gripen Integrated Air Defense System during 2014.

United Kingdom

The Empire Test Pilots' School (ETPS) in the United Kingdom has used the Gripen for advanced fast jet training of test pilots since 1999.

Potential and future operators

Brazil

In October 2008, Brazil selected three finalists for its F-X2 fighter programme: the Dassault Rafale B/C, the Boeing F/A-18E/F Super Hornet, and the Saab JAS 39E/F Gripen NG. The Brazilian Air Force had initial plans to procure at least 36 and possibly up to 120 later, to replace its current Northrop F‐5EM and AMX fighter, attack and training aircraft. The Brazilian Navy intends to form a complement of Sea Gripen carrier-based fighters to replace its Douglas A-4KU Skyhawks.

The decision was expected on 2 October 2009. On 2 February 2009, Saab submitted a tender for 36 Gripen NGs to the Brazilian Air Force Command. On 5 January 2010, the media reported that the final evaluation report by the Brazilian Air Force placed the Gripen ahead of the other two contenders. The decisive factor was reportedly the overall cost of the new fighters, both in terms of unit cost, and operating and maintenance costs. Amid delays due to financial constraints, there were reports in 2010 that say the Defense Ministry had chosen the Rafale, before reporting that President Dilma Rousseff had selected the F/A-18 in 2011. On 18 December 2013, President Roussef announced the selection of the Saab Gripen; a contract for 36 Gripen NG fighters is expected to be finalised in 10–12 months. According to Saab, Brazil is expected to order 28 single-seat (Gripen E) and 8 twin-seat (Gripen F) fighters.

Key factors in the decision were the possibility of internalising parts of manufacturing, as well as participating in the final years of development of the JAS 39E Gripen NG and Sea Gripen variants and exporting them to Africa, Asia and specially to Latin America, where it may have an easier market than Sweden would have directly.

As Brazil retired its Dassault Mirage 2000C fleet at the end of 2013, and deliveries are expected to begin only in 2018, it intends to lease from six to twelve Gripen C aircraft to supplement its current fleet of Northrop F‐5EM Tiger IIs.

Denmark

In 2007, Denmark signed a Memorandum of Understanding between the Defence Ministers of Sweden and Denmark to evaluate the Gripen as a replacement for Denmark's fleet of 48 F-16s. Denmark also requested the development of Gripen variants featuring more powerful engines, larger payloads, longer range, and additional avionics; this request contributed to Saab's decision to go ahead with development of the Gripen JAS E/F. Denmark has repeatedly delayed the purchase decision; in 2013, Saab indicated that the Gripen was one of four contenders for the Danish purchase. The others are Boeing's Super Hornet, Lockheed Martin's F-35 Joint Strike Fighter, and the Eurofighter. Denmark is a level-3 partner in the JSF programme, and has already invested US$200 million. The final selection will be in mid-2015 where 24 to 30 fighters are expected.

Netherlands

In July 2008, the Netherlands announced it would evaluate Gripen NG together with four other competitors; in response, Saab offered 85 aircraft to the Royal Netherlands Air Force in August 2008. On 18 December 2008, it was reported that the Netherlands had evaluated the F-35 as having a better performance-price relation than the Gripen NG. On 13 January 2009, NRC Handelsblad claimed that, according to Swedish sources, Saab had offered to deliver 85 Gripens for €4.8 billion, including pilot training and maintenance to the Dutch Air Force for 30 years, about 1 billion euro cheaper than budgeted for the F-35.

Switzerland

In January 2008, the Swiss Defence Material Administration invited Gripen International to submit bids to replace the nation's ageing F-5 fleet. Saab responded with an initial proposal on 2 July 2008; other contenders were the Dassault Rafale and Eurofighter Typhoon. On 30 November 2011, the Swiss government announced its decision to buy 22 Gripen NG aircraft for 3.1 billion Swiss francs. In 2012, a confidential report of the Swiss Air Force's 2009 tests of the three contenders was leaked, which had rated the Gripen as performing substantially below both the Rafale and the Eurofighter. The Gripen was assessed as satisfactory for reconnaissance but unsatisfactory for combat air patrol and strike missions. The JAS 39C/D had been evaluated, while the Gripen NG had been bid. The parliamentary security commission found that the Gripen offered the most risks, but voted to go ahead as it was the cheapest option.

On 25 August 2012, the plan to order was confirmed by both the Swedish and Swiss authorities. The aircraft are expected to be delivered from 2018 to 2021 at a fixed price of CHF 3.126 billion ($3.27 billion) which includes development costs, mission planning systems, initial spares and support, training, and certification. The Swedish government also guaranteed the price, performance and operational suitability of the aircraft. 8 JAS 39Cs and 3 JAS 39Ds are to be leased from 2016 to 2020 to train Swiss pilots and allow the retirement of the F-5s. In 2013, Saab moved to increase Swiss industry offsets above 100% of the deal value after the Swiss parliament's upper house voted down the deal's financing. On 27 August 2013, the National Council's Security Commission approved the purchase, followed by the approval of the lower and upper houses of the parliament in September 2013. A national referendum on the order is to be held on 18 May 2014; analysts expected it to pass, even if a question of Swedish interference in the vote arose.

Others

Other nations that have expressed interest in Gripen include Finland, Oman, Slovakia, Croatia, Bulgaria, Serbia, and the Philippines.

Saab's Head of exports Eddy de La Motte has stated that the Gripen's chances have improved as nations waver in their commitments to the F-35. Richard Aboulafia of the Teal Group has attributed difficulty securing export sales to the Swedish government's inability to offer the same sort of strategic partnership as some rival aircraft manufacturing nations. Speaking in September 2013, Saab's CEO Håkan Buskhe stated that he envisioned Gripen sales to reach 400 or 450 aircraft.

Failed bids

Austria

2003 the Gripen was one of the candidates to replace the aged Saab 35 Draken of the Austrian Airforce. Finally the Eurofighter Typhoon won.

India

Saab Gripen at Aero India 2011, Yelahanka Air force Base Bangalore

The Gripen was a contender for the Indian MRCA competition for 126 multirole combat aircraft. In April 2008, Gripen International offered the Next Generation Gripen for India's tender and opened an office in New Delhi in order to support its efforts in the Indian market. On 4 February 2009, Saab announced that it had partnered with India's Tata Group to develop the new Gripen variant to fit India's needs.

The Indian Air Force (IAF) conducted extensive field trials and evaluated Gripen's flight performance, logistics capability, weapons systems, advanced sensors and weapons firing. In April 2011, the IAF rejected Gripen's bid in favour of the Eurofighter Typhoon and the Dassault Rafale. Senior Indian Air Force officials, while happy with the improved capabilities of Gripen NG, identified its high reliance on US-supplied hardware, including electronics, weaponry and the GE F414 engine, as a factor that may hamper its export potential.

Poland

The Gripen C/D was one of contenders in competition for 48 new multirole fighters for the Polish Air Force started in 2001, the government previously planned to purchase 64 F-16A/B MLU. On 27 December 2002, the Polish Defence Minister announced the selection of the F-16C/D Block 50/52+. The third candidate was the Dassault Mirage 2000-5 Mk 2. According to Stephen Larrabee, the choice to go with the F-16 was heavily influenced by a lucrative offset agreement by Lockheed Martin, and the political emphasis placed on the strategic relationship between Poland, the US, and NATO. The Lockheed Martin's offer was valued at $3.5 billion and 170% offset, while the Swedish-British bid at €3.2 billion with 146% offset. Both Gripen International and Dassault Aviation described the decision as political. According to a former Polish military defence vice-minister, the JAS 39 offer was better, and had included research participation proposals.

Norway

On 18 January 2008, the Norwegian Ministry of Defence issued a Request for Binding Information (RBI) to the Swedish Defence Material Administration, who responded in April 2008 with an offer for 48 Gripens. On 20 November 2008, the Norwegian government announced that the F-35 Lightning II had been selected for the Royal Norwegian Air Force, stating that the F-35 is the only candidate meeting all of its operational requirements; media reports have claimed the requirements were tilted in the F-35's favour.

Saab and the Swedish defence minister Sten Tolgfors have criticised the selection, stating that there were flaws in Norway's cost calculations for the Gripen NG. The offer was for 48 aircraft over 20 years, but Norway had extrapolated it to operating 57 aircraft over 30 years, thus doubling the cost; Norway's operational cost projections also failed to relate to the operational costs of Sweden's Gripens. Norway also calculated with more attrition losses than what Sweden considered reasonable. According to Tolgfors, Norway's decision would complicate further export deals for the Gripen. In December 2010 leaked United States diplomatic cables revealed that the United States deliberately delayed Sweden's request for access to a US AESA radar until after Norway's selection. The cables also indicated that Norwegian consideration of the Gripen "was just a show" and that Norway had decided to purchase the F-35 due to "high-level political pressure" from the US.

Variants

JAS 39 Gripen taxiing in after display, Farnborough 2006

• JAS 39A: initial version that entered service with the Swedish Air Force in 1996. A number have been upgraded to the C standard.
• JAS 39B: two-seat version of the 39A for tactical weapons training, more specialised missions and type conversion. To fit the second crew member and life support systems, the internal cannon and one internal fuel tank were removed and the airframe lengthened 0.66 m (2 ft 2 in).
• JAS 39C: NATO-compatible version of Gripen with extended capabilities in terms of armament, electronics, etc. Can be refuelled in flight.
• JAS 39D: two-seat version of the 39C, with similar alterations as the 39B.
• Gripen NG: improved version tested with the two-seat technology demonstrator, named Gripen Demo, for the NG program. Changes from the JAS 39C/D are the more powerful F414G engine, Raven ES-05 AESA radar, increased fuel capacity and payload, two additional hardpoints, and other improvements.
• JAS 39E: single-seat production version developed from the Gripen NG program. Sweden has ordered the variant, with Switzerland and Brazil expected to place orders.
• JAS 39F: proposed two-seat version of the E variant. Eight to be ordered by Brazil.
• Sea Gripen: proposed carrier-based version based on the Gripen NG; its development was underway in 2011.
• Gripen UCAV: proposed unmanned combat aerial vehicle (UCAV) variant of the Gripen E.

Operators

Gripen users in blue, aircraft to be ordered in green, 2013

Saab JAS 39 Gripen of the Czech Air Force

There were 186 Gripens in service with military users as of January 2013.

Czech Republic

The Czech Air Force has 14 Gripens on lease; these include 12 single-seat C models and two two-seat D models, in operation in January 2013.

Hungary

The Hungarian Air Force operates 14 Gripens (12 C-models and two D-models) on a lease-and-buy arrangement as of January 2013.

South Africa

The South African Air Force (SAAF) ordered 26 aircraft; 17 single-seat C-models and nine two-seater D-models. The first delivery, a two-seater, took place on 30 April 2008. The South African Air Force has nine single-seaters and nine two-seaters in use as of January 2013.

Sweden

The Swedish Air Force originally ordered 204 aircraft, including 28 two-seaters. Sweden leases 28 of the aircraft, to the Czech and Hungarian Air Forces. The SwAF has 134 JAS 39s, including 50 JAS 39As, 13 JAS 39Bs, 60 JAS 39Cs and 11 JAS 39D Gripens in inventory in January 2013, with approximately 100 JAS 39C/D Gripens in operational use (including 31 A models refitted to the C level). The 60 original JAS 39Cs are to be retrofitted to the E level by 2023.

Thailand

The Royal Thai Air Force has ordered 12 JAS 39 Gripens (eight single-seat JAS 39C and four JAS 39D two-seaters). It had six JAS 39s, including four JAS 39Cs, and two JAS 39Ds in use as of January 2013. Nine were delivered in April 2013. Another three were delivered in September 2013. On 18 October, the Thai government announced their intentions to purchase another six Gripens.

United Kingdom

The Empire Test Pilots' School operates Gripens for training. ETPS instructor pilots and students undergo simulator training with the Swedish Air Force, and go on to fly the two-seater Gripen at Saab in Linköping, in two training campaigns per year (Spring and Autumn). The agreement was renewed in 2008.

Aircraft on display

Saab JAS 39 Gripen on display at the F 7 Såtenäs wing

• Second prototype JAS 39-2 is on display at the Swedish Air Force Museum, Linköping.
• Single seat JAS 39 serial 39113 is displayed at the F 7 Såtenäs wing.
• The Swedish government has donated one Swedish Air Force JAS 39A to Thailand for display at the Royal Thai Air Force Museum in Don Mueang, Bangkok.

Accidents and incidents

Main article: Accidents and incidents involving the JAS 39 Gripen

As of July 2011, the Gripen has been involved in eight incidents, including five hull-loss accidents, with no loss of life.

The first two crashes, in 1989 and 1993 respectively, occurred while displaying the Gripen to the wider public and resulted in considerable negative reporting in media. The first crash was filmed by a news crew from Sveriges Television and led to calls from previous critics of the project to cancel development altogether. The second crash resulted in a minor scandal since it occurred during the 1993 Stockholm Water Festival in central Stockholm with tens of thousands of spectators present. A human tragedy was narrowly avoided as the aircraft crashed in an empty area on the island of Långholmen. The pilot ejected in time and was unscathed, but one woman received burns that required hospitalization and 14 other individuals reported injuries of a "psychological nature". The event led to media criticizing the decision to display Gripen over large crowds and brought back memories of the embarrassing 1989 crash. Both the 1989 and 1993 crashes were related to flight control software issues.

Specifications (JAS 39C/D Gripen)

Gripen engine nozzle

External image
A detailed and labeled cutaway drawing of the Gripen from Saab

Data from Spick 2000, p. 431; Williams 2003, p. 90; Saab, Czech Air Force

General characteristics

• Crew: 1 (2 for JAS 39D)Wheel track: 2.4 m (7 ft 10 in)

Performance

• Thrust/weight: 0.97

Armament

• Guns: 1× 27 mm Mauser BK-27 Revolver cannon with 120 rounds (single-seat models only)
• Hardpoints: 8 (three on each wing and two under fuselage) , with provisions to carry combinations of:
  • Rockets: 4× rocket pods, 13.5 cm rockets
  • Missiles:
    
    • 6× AIM-9 Sidewinder (Rb.74) or IRIS-T (Rb 98)
    • 4× AIM-120 AMRAAM (Rb.99) or MICA
    • 4× Meteor (under development)
    • 4× AGM-65 Maverick (Rb.75)
    • 2× KEPD.350
    • 2× Rbs.15F anti-ship missile
  • Bombs:
    
    • 4× GBU-12 Paveway II laser-guided bomb
    • 2× Bk.90 cluster bomb
    • 8× Mark 82 bombs

See also

• Flygsystem 2020

Related lists

• List of fighter aircraft
• List of military aircraft of Sweden

References

Bibliography

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• "Gripen flies unstable". Flight International. London, UK: Flight global: 3. 11–17 December 1988. ISSN 0015-3710. Archived from the original on 12 January 2014. Retrieved 12 January 2013. {{cite journal}}: Unknown parameter |deadurl= ignored (|url-status= suggested) (help)
• "Saab/Gripen prototype crashes". Flight International. London, UK: Reed Business Information: 2–3. 11 February 1989. ISSN 0015-3710. Archived from the original on 13 November 2012. Retrieved 12 December 2013. {{cite journal}}: Unknown parameter |deadurl= ignored (|url-status= suggested) (help)
• "Resonance problem hits Gripen Engine". Flight International. 145 (4406). London, UK: Reed Business Information: 15. 2–8 February 1994. ISSN 0015-3710. Archived from the original on 16 December 2013. Retrieved 16 December 2013. {{cite journal}}: Unknown parameter |deadurl= ignored (|url-status= suggested) (help)
• "BAe offers Gripen to Oman to replace Jaguar". Flight International. 151 (4567). London, UK: Reed Business Information: 10. 26 March – 1 April 1997. ISSN 0015-3710. Archived from the original on 16 December 2013. Retrieved 16 December 2013. {{cite journal}}: Unknown parameter |deadurl= ignored (|url-status= suggested) (help)
• "Saab JAS 39 Gripen: um herdeiro da tradição nórdica". Aviões de combate a jacto (in Portuguese). 17. Saab JAS 39 Gripen (Suécia). Portugal: Altaya, Planeta de Agostini: p. 197. 2011. ISBN 978-989-651-217-0. {{cite journal}}: |page= has extra text (help); Unknown parameter |trans_title= ignored (|trans-title= suggested) (help).
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External links

• "Gripen fighter system", Air (official Website), Saab
• "Gripen". Army. Czech Armed Forces.
• Template:Dmoz