Su-57 Deployment in Syria

http://www.thedrive.com/the-war-zone/18693/did-russia-just-send-some-of-its-su-57-stealth-fighters-to-syria

https://twitter.com/WaelAlHussaini/status/966456661308248065

 Few reports showed RuAF deployed their newest Stealth jet in the Syria. 

 Still, this jet is in development phase, and it means these jets have limited capability than the others.

Purpose of the deployment is probably not more than testing. 

(Every body knows Syrian do not have serous challenger even for Su-35S)

 Few past demonstration of the Su-57 showed its aerodynamic characteristic was almost proved, however things related to avionics, system integration, tactics, ground-support, and weapon delivery capability is not certain. 

 As you know, US' counterpart, the F-22, is also operating in Syria to counter the IS, and a few month ago, F/A-18E shoot down Syrian Su-22 using its AIM-120 missile. 

Sukhoi or Russians, they want Su-57 to be real counterpart, threat, or challenger for F-22; then, we could expect that sending Su-57 is some kind of test for 'Countering F-22'. It does not mean Su-57 engage the F-22 with real missile or guns. The deployed Su-57 and other Russian assets try to sense and gather data of F-22 which will preciously be used for Su-57 development. 

On the other hand, US also glad the chance to do same things on the Russian's new fighter jet.