The second generation of fighter planes were jet fighters with
no missiles or complicated avionics.
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Depends what type of fighter jet it is
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If RAF refers to Russian air force, then yes, they have built one by the name Sukhoi PAK FA t50 . The name of the Indian version would be Sukhoi-HAL FGFA. (Sukhoi Hindustan Aeronautics Limited Fifth Generation Fighter Aircraft).