Siberian Aeronautical Research Institute named after S. A. Chaplygin is the largest research institute located in the eastern part of Russia. Here they assemble the An-2, the A-57, the Su-26 and the Su-27, and carry out fatigue tests of more then 200 types of aircrafts, including the supersonic Tu-144, the aerospace vehicle 'Buran', the Tu-204, and the Su-27.
Right now they are testing the SSJ-100, the T-50 and the MS-21. Here they also construct flying testbeds, project the Il-476, and test the reconstructed legendary attack plane Il-2.
The Sukhoi Superjet 100 (SSJ 100) is a Russian passenger aircraft, made by Sukhoi Civil Aircraft Company in cooperation with a number of other foreign companies.
The first flight of its prototype took place on May 19th, 2008. The start of operation was on April 21st, 2011.