On 25 September 1997 the S-37 Berkut (royal eagle) made its maiden flight from the flight test centre airfield at Zhukhovskii. The S-37 (sometimes referred as the .
The Sukhoi Su-47 Berkut (Russian: Су-47 Беркут - Golden Eagle), also designated S-32 and S-37 during initial development, is an experimental supersonic jet .
On 25 September 1997 the S-37 Berkut (royal eagle) made its maiden flight from the flight test centre airfield at Zhukhovskii. The S-37 (sometimes referred as the .
