The F-117A Nighthawk is a stealth fighter attack aircraft was developed by Lockheed Martin after work on stealth technology, and also the predecessor test demonstrator aircraft, Have Blue, was applied in secret from 1975.
The F-117A Nighthawk was the world's first operational aircraft designed to take advantage of low-observable stealth technology. The F-117A was a single-seat attack and defense suppression aircraft for the Air Force. The F-117 was designed to penetrate dense threat environments also as attack high value targets with pinpoint accuracy.
The F-117A is powered by two low-bypass F404-GE-F1D2 turbofan engines from General electric. the rectangular air intakes on each side of the fuselage are covered by gratings, that are coated with radar-absorbent material.
The wide and flat structure of the engine exhaust area reduces the infrared and radar detectability of the aft section of the engine. the two large tail fins slant slightly outwards to produce an obstruction to the infrared and radar returns from the engine exhaust area.
