first aircraft with reduced rcs [radar cross section}

F-117 NIGHT HAIt was the first aircraft designed to reduce its radar cross section[RCS] .The resulted in an unusual design. It has a very low rcs. It surprised and puzzled experienced pilots; a Royal Air Force pilot, who flew it as an exchange officer while it was still a secret project, stated that when he first saw a photograph of the F-117, he "promptly giggled and thought to [himself] 'this clearly can't fly'".

Early stealth aircraft were designed with a focus on minimal radar cross-section (RCS) rather than aerodynamic performance. Highly-stealthy aircraft like the F-117 Nighthawk are aerodynamically unstable in all three aircraft principal axesand require constant flight corrections from a fly-by-wire (FBW) flight system to maintain controlled flight.[36] It is shaped to deflect radar signals and is about the size of an F-15 Eagle.

It cam be clearly seen the nose dose not have any space to have a radar ....therefore it could not perform air -aiir combot and also drop guided bombs and after the arival of B2 .It was decommisioned.