Northrop Tacit Blue | |
|---|---|
| Pays | Usa |
| Rôle | Démonstrateur furtif |
| Premier vol | 5 février 1982 |
| Construit | 1 |
Lla Northrop Tacit Bleu était un avion de démonstration technologique créé pour démontrer qu’un avion de surveillance furtif à faible observabilité avec une faible probabilité d’interception radar et d’autres capteurs pouvait opérer près de la ligne de bataille avancée avec un haut degré de capacité de survie.
| Northrop Tacit Blue Promenade autour | |
|---|---|
| Photographes | John Heck, Vladimir Yakubov |
| Localisation | Inconnu |
| Photos | 64 |
Voir aussi :
General Characteristics and Role
The Northrop Tacit Blue was a highly classified technology demonstrator aircraft developed by the US Air Force and DARPA during the Cold War. Nicknamed « La baleine » Ou « Alien School Bus » due to its unusual, bulbous shape, its main purpose was to prove that a stealthy surveillance aircraft could operate safely close to the forward line of battle. It was revolutionary for being the first stealth aircraft to successfully use curved, Gaussian surfaces to achieve a low radar cross-section, a concept later used in the B-2 Spirit bomber. It was part of the Battlefield Surveillance Aircraft, eXperimental (BSAX) program and was designed around a large Side-Looking Array Radar (SLAR) system.
| Property | Typical Value (Tacit Blue) |
|---|---|
| Type | Stealth Technology Demonstrator / Surveillance Aircraft |
| National Origin | États-Unis |
| Fabricant | Northrop Corporation |
| First Flight | 5 février 1982 |
| Crew | 1 (Pilot) |
| Gross Weight | 13,608 kg (30,000 lb) |
| Length | 17.02 m (55 ft 10 in) |
| Envergure | 14.68 m (48 ft 2 in) |
Powerplant and Flight Control
- Engines: 2 x Garrett ATF3-6 high-bypass turbofan engines (buried in the aft fuselage to reduce heat signature).
- Thrust: 24.2 kN (5,440 lbf) each.
- Design Operational Speed: 460 km/h (290 mph or 250 knots).
- Operating Altitude: 7,600–9,100 m (25,000–30,000 ft) (designed for loitering).
- Stealth Features: Curved fuselage surfaces, V-tail, and a single flush inlet on the dorsal fuselage to minimize radar return.
- Flight Stability: The aircraft was highly aerodynamically unstable, necessitating a quadruple-redundant digital fly-by-wire flight control system to keep it stable.
- Armament: None; it was purely a reconnaissance testbed.
Operational History and Legacy
- Status: Classified Black Project from 1982 to 1985; declassified and revealed to the public in 1996.
- Flight Testing: Logged 135 test flights over three years in Area 51, Nevada.
- Technology Transfer: The data gathered from the Tacit Blue was instrumental in developing two critical US Air Force aircraft:
- The Northrop B-2 Spirit stealth bomber (for its curved surface stealth technology).
- The E-8 Joint STARS surveillance aircraft (for its low-probability-of-intercept (LPI) SLAR radar technology).
- Historical Significance: Tacit Blue is considered one of the most successful technology demonstrator programs in Air Force history, fundamentally changing the approach to stealth aircraft design by demonstrating the feasibility of curved stealth shaping.
Vues : 2594
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