Saab reveals full Gripen E design, cost savings
Saab has started fuselage assembly work on its first of three Gripen E test aircraft and revealed its detailed design for the future variant, which it says will beat the development and operational cost performance of the C-model fighter now flown by five air forces.
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Saab is adopting a stand-off strategy with regard to the Swiss Gripen Fund Law referendum, says campaign director Richard Smith. The Swiss air force project has a fixed price of just over Swfr3.1 billion ($3.6 billion), with Saab’s stake worth Swfr2.2 billion, and a weapons and sensors package valued at Swfr300 million. Offsets linked to the purchase will total Swfr2.5 billion, to be placed within 10 years of a deal being signed.
Switzerland’s Armasuisse procurement agency has so far approved offset proposals worth Swfr250 million, against an agreed pre-contract goal of Swfr300 million. Saab has recently contracted RUAG Aviation to manufacture electronic warfare pylons for installation on the wing leading edge, and this year also wants to select Swiss-based suppliers for the Gripen E’s rear fuselage, tail cone and airbrakes. “We’ve delivered a good offset package, and I believe we’ll get the majority we need,” says Smith.
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While externally similar, the slightly larger E will have five through-fuselage, aluminium-lithium frames at the heart of its structure, which will support its airframe through to its inner-wing weapons pylons. Its tail section has been redesigned to accommodate the General Electric F414G-39E turbofan engine, and a new intake has been added at the base of the tail for a second environmental control system, which is needed to cool its Selex ES Raven ES-05 active electronically scanned array radar and electronic warfare equipment.
The Gripen’s air intake design has also been enlarged, and new landing gear installed. The latter includes a larger, single nose wheel and main gear which retracts into the wing, freeing fuselage space and enabling a 40% increase in internal fuel capacity. Two additional weapon stations have also been introduced beneath the fuselage.
Maximum take-off weight will be 16.5t, with the type’s empty airframe weight accounting for just 20% of this, at around 3t.
Referring to the aircraft’s sensor configuration, which also includes the Selex Skyward-G infrared search and track (IRST) turret and an advanced interrogation friend-or-foe suite, Saab's Sindahl says: “It will be the best in the world when we ship the first one in 2018. We have really picked the best things.
”Risk-reduction work is being conducted using a modified Gripen D demonstrator, now referred to as aircraft 39-7. This should be flown with the IRST sensor later this month, while a new version of its ES-05 radar (file image below) is currently being shipped to Linköping.
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Lars Ydreskog, Saab’s head of aerospace operations, says the company’s use of a model-based design technique based aroundDassault Systemes’ CATIA software is generating huge benefits for the E project. “You can show the operator how they will do something in 2023, before you’ve done anything in the development,” he notes. Combined with a reduced parts count – for example, a single machined part is now used to construct the radar frame, versus more than 20 on the C – and reduced lead times, the new version will be cheaper to produce. Compared against 2009 prices, “it’s going to be a 50% productivity increase”, Ydreskog says. The E-model demonstrator activity using aircraft 39-7 has also been performed for just 40% of its initial projected cost, he adds.
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The global fleet of Gripens now operated by the Czech Republic, Hungary, South Africa, Sweden and Thailand has logged 203,000 flight hours, according to Saab. The Swedish air force lists its current per-hour operating cost with the type as being around SKr48,000 ($7,560).
In addition to its current favoured position in Brazil and Switzerland, Saab is also currently offering the Gripen to Malaysia, either for buy or lease, and believes Thailand could acquire a further batch to expand its 12-strong fleet. Further sales prospects listed by Sindahl include Belgium, Botswana, Denmark, Estonia, Finland, Indonesia, Latvia, Lithuania, Peru, the Philippines, Portugal and Slovakia.
The company also expects the Czech Republic to sign a contract in April to extend its lease deal for 14 C/Ds until at least 2026, mirroring a decision approved by Hungary in 2011.
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