EW radar   Early Warning radar.

FAB    Fugasnaya Awiatsyonna Bomba -- Russian
    designation for "general purpose bomb."
fatigue life    The length of time that a material can be
    acted upon by a constant force and remain structurally
    intact.
fighter jock   Slang for a fighter pilot.
fire and forget   Designates a self-guided weapon.
Fishbed   MiG-21. 
flak   Anti-aircraft fire -- from the German word
    Fliegerabwehrkanone.
Flanker   Su-27. 
flaperon   A combination flap and aileron.
FLIR   Forward-Looking Infrared.
Flogger-B    MiG-23.
Flogger-D, -J   MiG-27.
FLOLS    Fresnel Lens Optical Landing System.  The
    primary optical landing aid aboard an aircraft carrier,
    called the "ball".
fly-by-wire   A design whereby all the controls of an