The Su-47 "Berkut" fighter, built in a single prototype, determined the future of domestic aviation. The composite materials used in the combat aircraft were further developed in the civilian airliner MC-21-310, according to the press service of the Union of Machine Builders of Russia.
About half of the "Berkut" wing was made of carbon fiber, the share of which in the entire airframe reached 13%. The ONPP "Tekhnologiya" named after Romashin participated in the creation of the "black wing".
The accumulated experience was not wasted. Engineering developments were used in the creation of the Su-57, and methods for manufacturing composite structures received further development, including in the MC-21 passenger program.
Recall that the Su-47 "Berkut" did not go into production, but became a flying laboratory for testing promising technologies — including digital control and internal weapon placement.
As for composites in the MC-21-310, there are a great many of them in the airliner, as noted by Yakovlev. These include wings, panels, spars, empennage, fin-stabilizer, flap rails, elevators, and much more.