Upgraded Su-57 fifth-generation fighter made its first flight from the airfield in Zhukovsky. Flight lasted 56 minutes and passed without any faults. Aircraft is now undergoing tests of a complex of onboard equipment with expanded functionality, intelligent crew support and the ability to use a wide range of new types of weaponry. There are only three serial fighters of the fifth generation in the world - the American F-35, the Russian Su-57 and the Chinese J-20.