First prototype of the PAK FA fighter T-50-1, 29th January 2010.
First prototype of the Sukhoi T-50-1 (PAK FA) future fighter in April 2010.
After a few flights, main flight tests begin in LII (Gromov Flight Research Institute) @ Zhukovsky...
T-50-1 first flight: 29th January 2010.
T-50-2 first flight: 3rd March 2011.
T-50-3 first flight: 22 November 2011.

Experimental Sukhoi Su-47 in 1997 and in 1999.