Board Thread:General Discussion/@comment-26855942-20150814223211/@comment-26928960-20150827022954

Sukhoi Su-37 Terminator. In fact, this plane was always experimental, and the Su-37 itself was never mass-produced (actually, when it crash-landed all support for this "technology-demonstrator fighter" ended)... so, maybe it can be considered a Prototype (although old), as it was never used by nearly any other nation except Russia herself.

Until sum1 proves otherwise, i say it's a Prototype. (Unless such aircraft is not within topic, which i must say... apologies)