Russian 5th-generation fighter to make maiden flight on Friday

Russia is set to hold the first test of its futuristic fifth-generation fighter jet on Friday, a source at the country's largest aircraft producer said on Thursday.

"The [test] flight was initially scheduled for Thursday, but has been postponed," the source at the Gagarin KNAAPO company, a subsidiary of aircraft holding Sukhoi, said.

Russia's only known fifth-generation project is Sukhoi's PAK FA and the current prototype is the T-50. It is designed to compete with the U.S. F-22 Raptor, so far the world's only fifth-generation fighter, and the F-35 Lightning II, but has yet to take to the skies.

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