Su-47 Berkut fighter

The Su-47 Berkut (Golden Eagle) was the leading candidate for the Russian fifth-generation fighter program and perhaps the best fighter designed by Russian engineers before the collapse of the Soviet Union. Originally thought to be only a testbed for developing fifth-generation fighter technologies, it was considered for a time as the primary basic design for a next-generation fighter. The first two prototypes were designated S-32, while later versions were called S-37. It was...