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The Lockheed F-117 Nighthawk is a retired American single-seat, subsonic, twin-engined, stealth attack aircraft developed by Lockheed's secretive Skunk Works division and operated by the United States Air Force (USAF). It was the first operational aircraft to be designed with stealth technology.
The F-117 while having sufficient stealth, also had a low visual signature. Even still, if the F-117 was visually acquired, it, like all aircraft, were subject to visual air-to-air interception. This was easily circumvented by flying at night. [39] The F-22 Raptor, is an American fifth-generation stealth air superiority fighter
Lockheed F-117A Nighthawk Lockheed Have Blue was the code name for Lockheed 's proof of concept demonstrator for a stealth fighter. Have Blue was designed by Lockheed's Skunk Works division, and tested at Groom Lake , Nevada .
McDonnell Douglas F-4 Phantom II fighter-bomber: 1958: retired 2016: 5,195 [notes 2] 8,500: McDonnell Douglas F/A-18 Hornet fighter/attack aircraft: 1978: operational: 1,480: 6,200: North American A-5 Vigilante reconnaissance bomber: 1958: retired 1980: 156: 6,200: North American AJ/A-2 Savage nuclear attack bomber: 1948: retired 1964: 143: 5,400
F-117 is the Lockheed F-117 Nighthawk, an American stealth attack aircraft. F-117 or F117 may also refer to: Pratt & Whitney PW2000 (military designation F117), a turbofan jet engine; HMS Ashanti (F117), a British Royal Navy Tribal-class frigate; HMS Misoa (F117), a British Royal Navy Maracaibo-class LST Mk.I tank landing ship
Improved models of the A-7 would be developed, typically adopting more powerful engines and increasingly capable avionics. American A-7s would be used in various major conflicts, including the Invasion of Grenada, Operation El Dorado Canyon, and the Gulf War. The type was also used to support the development of the Lockheed F-117 Nighthawk.
On 27 March 1999, during the NATO bombing of Yugoslavia, a Yugoslav Army unit shot down a Lockheed F-117 Nighthawk stealth ground attack aircraft of the United States Air Force by firing a S-125 Neva/Pechora surface-to-air missile. It was the first ever shootdown of a stealth technology airplane.
One means to reduce IR signature is to have a non-circular tail pipe (a slit shape) to minimize the exhaust cross sectional area and maximize the mixing of hot exhaust with cool ambient air (see Lockheed F-117 Nighthawk, rectangular nozzles on the Lockheed Martin F-22, and serrated nozzle flaps on the Lockheed Martin F-35).