Sukhoi Su-47 Berkut
(also designated S-32 and S-37)

The Su-47 was primarily a technology demonstrator for future Russian fighters. Originally known as the S-37, Sukhoi redesignated its advanced test aircraft as the Su-47 in 2002. Officially nicknamed Berkut (the Russian word for the golden eagle). The project was launched in 1983 on order from the Soviet Air Force. But when the USSR dissolved, funding was frozen and development continued only through funding by Sukhoi. Only one aircraft was produced and it's first flight was on 25 September 1997.