Saab JAS 39 Gripen
The Saab JAS 39 Gripen is a light single-engine supersonic multirole fighter aircraft manufactured by the Swedish aerospace and defence company Saab AB. The Gripen has a delta wing and canard configuration with relaxed stability design and fly-by-wire flight controls. Later aircraft are fully NATO interoperable., more than 280 Gripens of all models, A–F, have been delivered.
In 1979, the Swedish government began development studies for "an aircraft for fighter, attack, and reconnaissance" to replace the Saab 35 Draken and 37 Viggen in the Swedish Air Force. A new design from Saab was selected and developed as the JAS 39. The first flight took place in 1988, with delivery of the first serial-production airplane in 1993. It entered service with the Swedish Air Force in 1996. Upgraded variants, featuring more advanced avionics and adaptations for longer mission times, began entering service in 2003.
To market the aircraft internationally, Saab formed partnerships and collaborative efforts with overseas aerospace companies. On the export market, early models of the Gripen achieved moderate success, with sales to nations in Central Europe, South Africa, and Southeast Asia. Bribery was suspected in some of these procurements, but Swedish authorities closed the investigation in 2009.
A major redesign of the Gripen series, previously referred to as Gripen NG or Super JAS, now designated JAS 39E/F Gripen began deliveries to the Swedish Air Force and Brazilian Air Force in 2019. Changes from the JAS C to JAS E include a larger fuselage, a more powerful engine, increased weapons payload capability, and new cockpit, avionics architecture, electronic warfare system and other improvements.
Development
Origins
In the late 1970s, Sweden sought to replace its aging 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 17 m wide rudimentary runways that were part of the Bas 90 system. 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.In 1979, the government began a study calling for a versatile platform capable of "JAS", standing for Jakt, Attack, and Spaning, indicating a multirole, or swingrole, fighter aircraft that could fulfill multiple roles during the same mission. Several Saab designs were reviewed, the most promising being "Project 2105", recommended to the government by the Defence Materiel Administration. In 1980, Industrigruppen JAS was established as a joint venture by Saab-Scania, LM Ericsson, Svenska Radioaktiebolaget, Volvo Flygmotor and Försvarets Fabriksverk, the industrial arm 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 licence-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 worth SEK 25.7 billion to Saab, covering five prototypes and an initial batch of 30 production aircraft. By January 1983, a Viggen was converted to a flying test aircraft for the JAS 39's intended avionics, such as the fly-by-wire controls. The JAS 39 received the name Gripen via a public competition, which is the heraldry on Saab's logo.
Testing, production, and improvements
Saab rolled out the first Gripen on 26 April 1987, marking the company'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 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, and the relaxed stability design. On 2 February 1989, this issue led to the crash of the prototype during an attempted landing at Linköping; the test pilot Lars Rådeström walked away with a broken elbow. The cause of the crash was identified as pilot-induced oscillation, caused by problems with the FCS's pitch-control routine.In response to the crash, Saab and US firm Calspan introduced software modifications to the aircraft. A modified Lockheed NT-33A was used to test these improvements, which allowed flight testing to resume 15 months after the accident. On 8 August 1993, production aircraft 39102 was destroyed in an accident at an aerial display for the Stockholm Water Festival. Test pilot Lars Rådeström lost control of the aircraft during a roll at low altitude when the aircraft stalled, forcing him to eject. Saab later found the problem was high amplification of the pilot's quick and significant stick command inputs. The ensuing investigation and flaw correction further delayed test flying by several months, resuming in December 1993.
The first order included an option for another 110, which was exercised 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 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 prototypes and two series-production Gripens had been completed; but a beyond-visual-range missile had not yet been selected. A third batch was ordered in June 1997, composed of 50 upgraded single-seat JAS 39Cs and 14 JAS 39D two-seaters, known as 'Turbo Gripen', with NATO compatibility for exports. 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 duration missions. In-flight refuelling was tested via a specially equipped prototype used in successful trials with a Royal Air Force VC10 in 1998.
Teaming agreements
During the 1995 Paris Air Show, Saab Military Aircraft and British Aerospace announced the formation of 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 co-operation 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 of acts of corruption by BAE Systems, including money laundering in South Africa, one of the Gripen's customers.On 26 April 2007, Norway signed a NOK150 million joint-development agreement with Saab to co-operate 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 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 co-operation 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 that let them participate in an Industrial Co-operation programme over the next 10–15 years. The total value of the programme was estimated at over DKK10 billion, and was partly dependent on a procurement of the Gripen by Denmark. Subsequently, Denmark elected to procure the F-35 Joint Strike Fighter.
Controversies and scandals
Developing an advanced multi-role fighter was a major undertaking for Sweden. The predecessor 37 Viggen 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 Socialdemokraterna, 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 Gripen project passed in the Riksdag by a margin of 176 for and 167 against, with the entire Social Democratic party 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 1989 and 1993 crashes, the Gripen risked a loss of credibility and the weakening of its public image. There was public speculation that failures to address technical problems exposed in the first crash had directly contributed to the second crash, which thus had been avoidable. Brändström observed that media elements had called for greater public accountability and explanation of the project; ill-informed media analysis had also distorted public knowledge of the Gripen. The sitting Conservative government quickly endorsed and supported the Gripen – Minister of Defense Anders Björck issued a public reassurance that the project was very positive for Sweden. In connection to the Gripen's marketing efforts to multiple countries, including South Africa, Austria, the Czech Republic and Hungary, there were 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. 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.