Iran in August 2018 began test flights of another jet fighter made by reverse-engineering F-5s delivered to Iran prior to Shah Mohammed Reza Pahlavi’s abdication in January 1979, the HESA Kowsar. Despite having been touted by Iranian state media as 100 percent indigenously made, the only novel features of the Kowsar include digital data networks, a glass cockpit, a heads-up display (HUD), ballistic computers and smart mobile mapping systems, and like the Azarakhsh and Saeqeh (also derived from the F-5), the Kowsar uses a reverse-engineered J85 turbojet (powerplant for F-5) dubbed the Owj.

HESA has also built a jet trainer, the Yasin, which resembles the CASA C-101 in many respects and also is powered by the Owj turbojet.

Therefore, the Islamic Republic of Iran Air Force in some respects still uses American- and European-supplied jet aircraft built before the Islamic Revolution but in other respects operates either Russian-supplied aircraft or locally made aircraft based on reverse-engineered F-5s. It has recently transpired that the Bell 212 helicopter used by the IRIAF which crashed this month in northern Iran and took Ebrahim Raisi’s life was built in the 1990s and delivered to Iran in the early 2000s.

https://en.wikipedia.org/wiki/HESA_Kowsar

https://en.wikipedia.org/wiki/HESA_Yasin

https://www.aljazeera.com/news/2018/11/iran-starts-mass-producing-local…

https://iranpress.com/iran-s-army-unveils-yasin-jet-trainer

https://www.reuters.com/world/middle-east/what-we-know-about-crashed-he…