A further development of the Su-47, the Su-50 is a Russian response to the F-22 Raptor. The Flapjack uses the same fuselage as the Berkut tech demonstrator. Rather than using a forward swept wing design Sukhoi engineers decided on a more conventional wing. Forward canards were kept to add to the Su-50's maneuverability. New electronics, materials, and radar was added to the design. To keep the radar cross section low, the Flapjack can carry weapons internally. Like the JSF additional hardpoints can be added to the wings to carry more weapons.
So far the Su-50s have been attached to air defense regiments inside Russia under the control of Strany-PVO. An export version of the Flapjack was made available shortly after entering serivice with Russia. India has purchased the most Su-50s. Indian Air Force commanders saw the Flapjack as a cheap and easy way to acquire a 5th Generation fighter. Indian Su-50s known as the Su-50IKs have local electronics and computer upgrades. Iran has a squadron of Flapjacks while Venezuela is only now receiving their own Sukhois after a failed deal with China for their 5th Gen aircraft.
My take on the Russian TA-50 project. It is a Russian program by Sukhoi to create a 5th Generation fighter. I decided to mod an Su-47. According to reports the Russians were not satisfied with the forward swept wings and were looking to moving back to a conventional layout. After that just colored it in Su-27 Flanker colors. The side view is a Su-47 outline slightly modified.