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https://en.wikipedia.org/wiki/Sukhoi_Su-47 The Sukhoi Su-47 Berkut (Russian: ????? ??-47 ??????, lit. 'Golden Eagle') (NATO reporting name Firkin), also designated S-32 and S-37 (not to be confused with the twin-engined delta canard design offered by Sukhoi in the early 1990s under the designation...