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F-22 is ATF(Advance Tactical Fighter) researched as a succession machine of F-15 and F-16. United State air force adopted it as a main force fighter century 21.It has the feature of speed of Mach 2.5 or more, Cruise speed of Super sonic without the afterburner, Long flying time, high mobility etc.Moreover, it is a design that considers stealth as the most important function.
