Don't know if anyone here remembers the SAIA-90. Argentina's stealth fighter program.
The
FMA SAIA 90 was an
air superiority aircraft designed by the FMA (
Fabrica Militar de Aviones) with the collaboration of
Dornier in the mid-1980s. The SAIA 90 which was the last stage of the ACA (Avión Caza Argentino) project, which was started by the
Proceso de Reorganización Nacional to develop an Argentine fighter aircraft.
The three stages of the project were:
Phases of the project
By the middle of 1980 the Fabrica Militar de Aviones and Dornier had a flowing relationship as a result of the combined development of the IA 63, and both contemplated a cooperation agreement for the production of future airplanes. This agreement called to both parties to establish a common office in the city of
Córdoba, Argentina within the year for the production, marketing and associated support services of their products.
The development of a trainer was the first step of three in the strategy of
Fabrica Militar de Aviones, elaborated after the development of the
IA 58 Pucará by the middle of those ' 60, the steps of this strategy contemplated: Nro.1, the Pampa, Nro.2, an airplane of light transport and Nro.3, a combat airplane.
This way, the German maker gave some sketches of the preliminary design, which contemplated generic aspects for a combat airplane, that then the air force should adapt to its own requirements.
The study of the Germans foresaw some analyses that allowed to formulate those basic requirements as being: air combat under imaginary operative conditions, and characteristic of the weapons that this aircraft probably have. This way it could be defined the call of
field of aerial fight
Acting in combat
Taking as reference the conflict in
Vietnam, the combats were carried out in inferior bench marks than the 8000 mts and most pilots tried to neutralize the threat of
SAM. Although in both sides they had Mach 2 airplanes, the combats got rid to speeds of among Mach 0.5 and 0.9, overcoming few times the supersonic speed.
It is probable that to those regimens they were achieved the best turn speed and the pilots surely found in those ranges a high yield of their airplane.
These parameters were taken into account in the design of the airplane to achieve high values of Mach, for what achieves a more enlarged curve of the régime of sustained turn, but the maximum values are conserved in the region
transonic, in this aspect it also takes into account the load factors determined by the pilot that can define the régime of instantaneous turn.
Characteristics
According to this analysis the margins of design of the airplane should be: sustained turn speed of Mach 0.9 at 6000m of height; great capacity of acceleration among Mach 0.9 at 1.5 to 9000 m: high deceleration, independent of the relative speed; reasonable combat autonomy with integral deposits; and minimum radar silhouettes and to IR (Stealth).
Possible armament
- 1
Mauser 27mm
Gun with 150 cartridges.
- 2
AAM InfraRed (type
AIM-9 Sidewinder) - 4
AAM radar guided located under the fuselage. - Up to 5000 kg of air to surface armament.
The avionics
Air to air radar on board in way to be able to detect 5m2 targets at a distance of 90km without been detected by the enemy
CME, and it should also have capacity to make the multiple pursuit of 6 targets that could be identified with an associate
IFF. For the way it attacks, air-earth, was convenient a radar able to capture the profile of the earth.
Configuration
Although it was desirable to achieve a combination of the advantages that a very loaded wing delta and little weight offers; the turn capacity to régime transonic/subsonic of one darted with small lengthening, the stability of a wing delta without line plane and the character
STOL of a wing of arrow variable, was impossible to gather all these qualities in a wing.
The opposing solution of commitment for the pattern, was the continuation of the border of attack of the wings that generated a vortex of high energy (
apex) and it improved the
aerodynamic yield notably in big angles of incidence. Another characteristic of the design was the artificial longitudinal stability that allowed equilibrating the airplane by means of the application of positive forces on the line planes.
This way a direct wing was configured with big arrow angles, continuations in the union wing-fuselage and a double derives located before the stabilizers that it keeps certain likeness to the
F/A-18C Hornet.
Motors: 2 turbofan of 5600kg of push (possibly GE F-404) Maximum speed: About Mach 2 Weigh (empty): 7.800kg
The weight calculated for the airship was reasonably low, achieved by means of the use of compound materials. The experience of
Dornier in these materials was wide (
Alpha Jet and
Do 228). In the proposal for this airplane suggested the use in the wing of 65% reinforced plastics with fibers of carbon (PRFC), 20% aluminum and the rest in several materials as the titanium, the front fuselage would have 60% of PRFC, the central 18% and the bottom 10%, being completed with other materials employees in the wing, and the horizontal empenaje would have 55% of
PRFC, while the vertical one would take 70%, the same materials would be used for the admission nozzles and the landing train. (aeroespacio 1982/83)
Terms of the project
The
Fábrica Militar de Aviones estimated in about 12 to 15 years until crystallizing it from the moment the specifications they were approved, that in 1987 they were very high. In that time, the airplane would be able to replace the existent fighter fleet. The first flight of the prototype was foreseen later for 1989 and the deliveries two years later
Looking for partners
By the middle of 1980
Fábrica Militar de Aviones, it already faced serious financial difficulties, with a deficit of U$S 50 annual millions and it was in the search of partners to face diverse business that they allowed him to survive giving 49% of their property.
It was evident that the factory could not face the project by itself and it maintained diverse contacts, such as
Aermacchi-
Aeritalia,
McDonnell Douglas and
Fairchild, with the intention of attracting a partner with the one who to share the project.
Although the intention of the air force was to add
McDonnell Douglas, which maintained negotiations for a possible license of production of the
A-4M Skyhawk II (now, the
A-4AR Fightinghawk) and another one of seats eyectables for the trainer
IA 63 Pampa, but the Americans desisted of assuming the risk, because its offer of fighters was covered.
Another possibility was explored then with
Aeritalia-
Aermacchi, but the financial problems that it crossed the country they made finally shipwreck to the project.
Specifications
Role:
multirole.
Crew: 1, although there also would have been a 2-seat trainer version.
Length: 15.53 m.
Height: 3.96 m.
Wing span: 10.95 m.
Wing area: 30 m˛.
Wheelbase: 6.60 m.
Empty weight: 7,800 kg.
Max take-off weight: 14,500 kg.
Max wing loading: 266.67 kg/m˛.
Max speed: Mach 2.25.
Max climb rate: 15,000 m/min. Ceiling: 15,000 m.
Range: 3380 km.
Engine: 2
GE F404 turbofan.
Armament: 11 hardpoints for a total of 5.000kg : 4 under the fuselage, 2 under each wing, 2 wingtip and 1 central harpoint. It'd also had one revolver cannon 27 mm.
Avionics: air to air radar capable to detect 5m2 targets in a range of 90 km, 6-target multiple pursuit, 3D air to surface radar capable to receive the earth shape, digital flight control system, multi-function nav/attack system and secure communications.
Cost: unknown but cheaper than
4.5th generation aircraft.
Conclusion
The benefits for
Argentina that this project would represent, as being the obtaining of machineries and technologies, and regarding structures and compound materials, such as the fibers of carbon and the titanium, they had served as industrial base to the project and
Fábrica Militar de Aviones.
From Wikipedia:
http://en.wikipedia.org/wiki/FMA_SAIA_90
Originally Posted by Ordie
Posting Permissions
Reply With Quote
