Russia on Friday unveiled a new fighter aircraft touted as a rival of the US F-22 stealth jet and developed amid the highest secrecy as part of a plan to modernize the armed forces.

The fifth generation fighter, manufactured by the Sukhoi company and known as the PAK FA, made a maiden flight of just over 45 minutes at the firm’s home base of Komsomolsk-on-Amur in the Far East region.

“The flight lasted 47 minutes during which all the aircraft’s systems were tested. It was successful,” Sukhoi spokeswoman Olga Kayukova told AFP. “This is the first time it has been unveiled.”

“The aircraft performed well in all stages of the flight programme. It is easy and comfortable to pilot,” said Sergei Bogdan, the pilot for the flight, in comments published on the Sukhoi website.

The first flight of the PAK FA (Prospective Aviation System of Frontline Aviation) is being seen in Russia as a major boost for the military after the project was hit by repeated delays over the last years.

“There is no doubt that the plane is needed,” the ex-commander of the Russian air force, Anatoly Kornukov, told the Interfax news agency.

“Our Su-27 and MiG-29 planes are good but have aged. They are 20 or more years old and it’s time to have something as a replacement,” he said.