Iran's 'New' Fighter Jet Provokes Derision, As Observers Note Likeness To U.S. Jet From The '60s

Other analysts also suggested the age of the original aircraft would be a factor. “Yes, it’s a modernised F-5, first designed in the 1950s and in service since the 60s. One can get a lot out of modernising older airframes but this is pushing it,” said Justin Bronk, research fellow for airpower and technology at the Royal United Services Institute.