F-117 NIGHTHAWK
F 177 Nighthawk is the first operational aircraft specifically designed around stealth technology. Stealth aircrafts are designed to avoid detection using a variety of technologies that reduce reflection/emission of radar, infrared, visible light, radio frequency spectrum and audio, collectively known as stealth technology. ROLE - Stealth attack aircraft NATIONAL ORIGIN - United States MANUFACTURERE - Lockheed Corporation FIRST FLIGHT - 18 June 1981 INTRODUCTION - October 1983 RETIRED - 22 April 2008 PRIMARY USER - United States Air Force NUMBER BUILT - 64 ( 5 YF-117 , 59 F-117 ) UNIT COST - US $ 42.6 million (flyaway cost) , US $ 111.2 million (average cost) DEVELOPED FROM - Lockheed Have Blue WINGSPAN - 13m HEIGHT - 3.8m TOP SP