The jet has many defects. The engine, exhaust, the fat wings and the sloppy frame/body, the overall size. Its nothing but a propaganda for public consumption. Japan with all its mighty capability still struggling to come up with a 5th gen western like fighter jet.I believe Iran is just trying to show off that it can build aircraft but look at their aviation industry it's a failure almost. they barely build aircraft and the ones they do build are in limited numbers. I wouldn't be shocked if they parade this around to show KSA, Qatar, Turkey, USA etc. they can build a 5th gen jet but in reality I see them going to Russia or China for a future fighter.